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If you're seeking unparalleled clarity and color fidelity in your photography, the 67mm X4 Circular Polarizer Filter with MRC16 and nanotec Coating Layers is the pinnacle of polarizing filter technology. Crafted with precision, this filter boasts an American-made CPL film, developed exclusively by Breakthrough Photography, to deliver the most color-neutral results possible. Unlike standard filters that often impart a yellow cast due to their off-the-shelf CPL film, the X4 CPL filter features a meticulously engineered transmission curve that ensures warm, vibrant images without unwanted color shifts.The X4 CPL's superior design is evident in its robust brass traction frame, which provides exceptional durability and ease of use for photographers in the field. This design has been rigorously tested and proven by outdoor photography enthusiasts, ensuring reliability in even the most challenging environments.Spectrometer testing confirms the X4 CPL's claim to fame as the world's most color-neutral circular polarizer. Its unique manufacturing process results in a controlled decline in IR transmission across the visible spectrum, maintaining color fidelity throughout the infrared range. This attention to detail means that the X4 CPL filter can enhance your camera's dynamic range, allowing you to capture scenes with greater vibrancy, contrast, and detail that would otherwise be obscured by glare.The X4 CPL is not only about color accuracy but also about optical excellence. It features SCHOTT Superwhite B270 optical glass, renowned for its high purity and exceptional light transmission across the ultraviolet, visible, and infrared spectrums. The glass surface is primed for Breakthrough Photography's advanced MRC and nanotec coatings, which are designed to repel water and resist smearing.Breakthrough Photography's proprietary multi-resistant coating (MRC) is applied to both sides of the glass, enhancing the filter's durability and reducing reflections. This results in improved image contrast and color saturation by preventing stray light from washing out the scene. With 8 layers of MRC on each side, the filter achieves an optimal balance of light transmission and flare reduction, culminating in MRC16.In addition to its optical prowess, the X4 CPL is weather-sealed to endure extreme conditions, from high winds and saltwater to dust and abrasive elements. This resilience is backed by Breakthrough Photography's 25 Year Ironclad Guarantee, supported by US-based customer service through phone, email, and live chat.For photographers who demand the best in color neutrality, durability, and optical clarity, the 67mm X4 Circular Polarizer Filter with MRC16 and nanotec Coating Layers is an investment that promises to elevate the quality of your imagery for years to come.

It is 1919, and Elizabeth Hughes, the 11-year-old daughter of America's most distinguished jurist and politician, Charles Evans Hughes, has been diagnosed with juvenile diabetes. It is essentially a death sentence. The only accepted form of treatment—starvation—whittles her down to 45 pounds of skin and bones. Miles away, Canadian researchers Frederick Banting and Charles Best manage to identify and purify insulin from animal pancreases—a miracle soon marred by scientific jealousy, intense business competition, and fist fights. In a race against time and a ravaging disease, Elizabeth becomes one of the first diabetics to receive insulin injections—all while its discoverers and a little-known pharmaceutical company struggle to make it available to the rest of the world. Relive the heartwarming true story of the discovery of insulin as it has never before been told, written with authentic detail and suspense, and featuring walk-ons by William Howard Taft, Woodrow Wilson, and Eli Lilly, among many others.

A hand-inspected Used copy of "Conformation and Performance" by Nancy S. Loving. Ships directly from Textbooks.com

With the 82mm X4 Circular Polarizer Filter, experience the pinnacle of advanced photography technology. This high-quality, durable filter, designed by Breakthrough Photography, is crafted with an innovative American-made CPL film and a robust brass traction frame, offering unparalleled design and durability.The X4 CPL stands out as the world's most color-neutral CPL, a testament to Breakthrough Photography's commitment to innovation and quality. Unlike other filters that use off-the-shelf CPL film designed for LCD panels, the X4 CPL utilizes a unique, internally developed film manufactured in California. This ensures a gradual transmission decrease from 600nm onward, resulting in warm, lively images without the typical yellow color cast.This effective and versatile filter is also equipped with a transmission curve spectrometer, an optical instrument that measures wavelength or intensity. While no CPL filter can claim perfect neutrality, the X4 CPL guarantees the most color-neutral performance among all CPL filters. This is achieved by controlling the IR transmission across the visible spectrum, thereby expanding your dynamic range in-camera.Designed with outdoor photographers in mind, the X4 CPL is built to withstand extreme conditions, from high winds to salt water and dust. Its state-of-the-art nanotec Nano Coatings Technology repels water and other elements, ensuring the filter's longevity and performance. The X4 CPL features SCHOTT Superwhite B270 optical glass, an ultra-clear crown glass known for its excellent transmission in the ultraviolet, visible, and infrared spectrums. This high surface quality glass is coated with Breakthrough Photography's proprietary multi-resistant coating (MRC), which reduces reflection and increases surface durability. This results in improved contrast and color, and reduced green flaring and low light transmission.In conclusion, the 82mm X4 Circular Polarizer Filter with MRC16 & nanotec Coating Layers is an innovative, effective, and versatile tool for any photographer looking to enhance their image quality and expand their creative possibilities.

Are you in search of a high-quality circular polarizer filter that delivers superior color neutrality and optimal optical clarity? Look no further than the 77mm X4 Circular Polarizer Filter with MRC16 & nanotec Coating Layers. This advanced filter, crafted by Breakthrough Photography, is a game-changer in the world of photography.The X4 CPL is not just any circular polarizer. It's a product of innovative American engineering, featuring an all-new brass traction frame for unmatched design and durability. This filter is the epitome of Breakthrough Photography's commitment to excellence, boasting the world's most color-neutral CPL film, manufactured right here in California.Unlike other filters that use off-the-shelf CPL film designed for LCD panels, the X4 CPL employs a unique approach. It uses a proprietary CPL film that ensures a gradual transmission decrease from 600nm onward, controlling transmission into IR without the curve spike. The result? Warm, vibrant images without the typical yellow color cast.The X4 CPL's color neutrality is further confirmed by spectrometer tests. While no CPL filter can claim perfect neutrality, the X4 CPL comes closest, guaranteeing the most color-neutral performance among all CPL filters. This is achieved by reducing the predictable transmission increase at 650nm and controlling the IR range, a feat made possible by Breakthrough Photography's innovative manufacturing methods.The X4 CPL is also a powerful tool for expanding your camera's dynamic range. It allows you to control the amount of polarization, adding vibrancy, contrast, and revealing details that are otherwise unseen. This is particularly useful for outdoor photographers dealing with challenging lighting conditions.The design of the X4 CPL is a testament to Breakthrough Photography's dedication to durability and functionality. Built to withstand extreme conditions like wind, salt water, and dust, it's the ideal companion for field work. It also features state-of-the-art nanotec Nano Coatings Technology, which repels water and other elements, preventing smearing and ensuring optimal performance.The X4 CPL is not just durable, but also guarantees optimal optical clarity and color neutrality for 25 years, even in the harshest conditions. This is backed by Breakthrough Photography's 25 Year Ironclad Guarantee with US-based support.The X4 CPL is crafted with SCHOTT Superwhite B270 optical glass, an ultra-clear crown glass known for its excellent transmission in the ultraviolet, visible, and infrared spectrums. It's coated with Breakthrough Photography's proprietary MRC coating on both surfaces of the glass disk, reducing reflection, increasing surface durability, and improving contrast and color. In conclusion, the 77mm X4 Circular Polarizer Filter with MRC16 & nanotec Coating Layers is a top-tier choice for photographers seeking to enhance their images' quality and color neutrality. It's a testament to Breakthrough Photography's commitment to innovation,...

Find the perfect companion for your photography endeavors in the 82mm X2 Circular Polarizer Filter. Crafted with critically sharp AGC glass from Japan, this filter offers unparalleled color neutrality, making it the top choice for professional photographers seeking the best circular polarizer on the market. The X2 CPL filter, proudly made in the USA by Breakthrough Photography, features an innovative traction frame design. Unlike traditional flat black polarizers with smooth surfaces that are often challenging to rotate, this filter incorporates CNC machined traction directly into the sides of the frame. This unique design allows for easy and secure attachment and removal of the filter, as well as effortless rotation with just one finger - a significant advantage when a lens hood is attached.The state-of-the-art 8-layer multi-resistant coating on this filter effectively eliminates flaring and ghosting, enhancing your image quality. Moreover, the nanotec nano coating layers serve as a protective shield, repelling dust, water, and other elements, making the filter faster and easier to clean. Constructed with environmentally friendly aluminum, the X2 CPL filter is not only incredibly durable but also astonishingly light. Its weather-sealed construction ensures your lens remains protected from the elements, while the double-threaded design allows for easy filter stacking. The X2 CPL filter is fully compatible with all your lens caps, making it a versatile addition to your photography equipment. Experience the difference in image quality with the 82mm X2 Circular Polarizer Filter, designed for the discerning photographer who values high-quality, effective, and professional equipment.

A revolutionary innovation in the world of photography, the 67mm 3-Stop Dark Circular Polarizer Filter from Breakthrough Photography is a unique combination of ND (Neutral Density) and CPL (Circular Polarizer) filters. This high-quality, durable filter is designed to enhance your outdoor photography experience by eliminating the common issue of vignetting at 16mm on a full-frame setup. Known as a 'Dark CPL', this versatile filter merges the features of the X4 ND and X4 CPL into one, effectively reducing the need for stacking multiple filters. The result is an improved image quality with reduced reflections and glare, thanks to its multi-coated coating. The rounded design of the filter allows for more light to pass through, ensuring a brighter image with less loss of detail.This easy-to-use Dark CPL filter is compatible with a wide range of camera and lens systems, including but not limited to Leica, Carl Zeiss lenses, Schneider Xenon, Canon Cinema and L lenses, Nikon, Sony, and Fuji. It's an effective tool for photographers aiming to increase contrast and saturation, while also reducing lens flare and ghosting. Whether you're a professional photographer or a passionate hobbyist, the 67mm 3-Stop Dark Circular Polarizer Filter is a valuable addition to your photography gear, designed to enhance the overall quality of your images.

Explore the exceptional capabilities of the Breakthrough Photography X2 49mm UV Traction Filter, a must-have tool for professional photographers. Crafted with high-grade AGC glass from Japan, this filter is designed to enhance your photography experience by delivering stunning image quality and critically sharp resolution. The X2 UV Traction Filter boasts an 8-Layer Multi-Resistant Coating (MRC8), a state-of-the-art process that hardens both optical surfaces, increases light transmission, and reduces reflections. This innovative coating achieves true color neutrality while maximizing contrast fidelity, ensuring your images are as vibrant and true-to-life as possible. Constructed with durability in mind, the X2 filter features a unique Traction frame, precisely engineered for easy, secure attachment and removal. This filter is CNC machined with narrow and precise tolerances, guaranteeing the highest level of craftsmanship in every piece. The X2 filter also incorporates Breakthrough's nanotec Nano Coating layer, a technology that repels dirt, water, and other elements by beading rather than absorbing. This makes cleaning your filter faster and easier than ever before, ensuring you can focus on capturing the perfect shot. The ultra-slim 3.5mm double-threaded Traction Frame design eliminates vignetting on wide-angle full-frame setups, reducing light falloff and ensuring a secure fit for lens caps. Laser engraved lettering on the X2's traction frame guarantees that the lettering won't fade or come off, even after consistent use. Each X2 Traction Frame is engraved with a unique serial number, allowing Breakthrough to provide personalized support and verify the authenticity of the filter. This UV filter is also weather-sealed, providing an additional layer of protection for your lens against dust and water, as recommended by leading camera manufacturers like Canon, Nikon, and Sony. Experience the difference with the Breakthrough Photography X2 49mm UV Traction Filter, a high-quality, effective, and innovative solution for professional photographers.

You can elevate your photography to new heights with the Breakthrough Photography 77mm X2 ND Traction Filter. This professional-grade filter, designed with a 3-stop weather-sealed traction frame, is the perfect tool for photographers aiming to capture stunning images in varying light conditions. Constructed with high-quality AGC glass from Japan, this filter ensures superior optical performance. It is layered with MRC-8 and nano-coating layers that repel water and dust, preserving the integrity of your images and the durability of the filter itself. The X2 ND filter is not just effective, but also user-friendly. Its weather-sealed traction frame simplifies the process of attaching and detaching the filter, making it a reliable companion for your photography adventures. The state-of-the-art multi-resistant coating (MRC) applied to each side of the optical disk enhances the filter's durability by increasing scratch resistance. This results in a total of 8 MRC layers, making the filter structurally harder than the glass itself. The X2 ND filter is meticulously CNC machined with narrow tolerances and subjected to a strict quality control process. This ensures that each filter is built to last, promising a lifespan of at least 25 years. The 3.5mm ultra-slim double-threaded Traction frame profile eliminates vignetting on wide-angle full-frame setups, ensuring that your images are captured in their full glory. The frame is laser engraved with lettering and a unique serial number, ensuring the longevity of the filter's identification even after consistent use. This filter also enhances the weather-sealing of your lens, as recommended by leading camera brands like Canon, Nikon, and Sony. Without a filter, your lens is susceptible to dust and water damage, but with the X2 ND filter, you can protect your lens and maintain its out-of-box optical performance for as long as possible. In summary, the Breakthrough Photography 77mm X2 ND Traction Filter is a durable, high-quality, and effective tool for professional photographers seeking to enhance their photography skills and protect their valuable equipment.

With the Breakthrough Photography X1 UV Flat Black Filter, you can enhance your photography experience, whether you're a professional or an amateur. This high-quality, 58mm UV filter is designed to effectively filter out ultraviolet light, reducing UV haze and significantly improving image quality. The X1 UV filter is part of Breakthrough Photography's latest X-Series lineup, featuring an innovative Traction frame design, state-of-the-art optics, and advanced multi-resistant coatings. The filter's ultra-slim 3.5mm standard flat black frame is equipped with MRC4, a multi-resistant coating applied to each side of the optical disk. This results in a total of MRC-4, which not only makes the filter structurally harder than glass but also enhances light transmittance and prevents common optical issues such as flaring, ghosting, and low contrast. Ideal for outdoor photography, the X1 UV filter is weather-sealed for durability in harsh conditions. It also serves as a protective layer for your lens, helping to maintain its optical performance and complete its weather-sealing. The X1 UV filter is thin, lightweight, and robust. Its 3.5mm ultra-slim double-threaded frame profile eliminates vignetting on wide-angle full-frame setups. The frame is laser engraved with lettering and a unique serial number, ensuring its longevity even with consistent use. In addition to its functional benefits, the X1 UV filter also adds a layer of protection to your lens. Without a filter, your lens is susceptible to dust and water damage. With the X1 UV filter, you can safeguard your lens and maintain its out-of-box optical performance for a longer period. Experience the difference with the Breakthrough Photography X1 UV Flat Black Filter, a reliable, effective, and professional choice for photographers aiming for the highest quality images.

Under the banner of world-class photographic equipment, we present the 100x150mm 3-Stop Hard Reverse X4 Graduated Neutral Density Filter, the pinnacle of our X4 ND filter technology. This filter, crafted from tempered SCHOTT B270 optical glass from Germany, stands as the world's sharpest and most color-neutral Graduated Neutral Density (GND) filter.A GND filter is a rectangular tool that significantly enhances your camera's dynamic range. It is particularly effective when capturing sunrise or sunset images, transforming photographs with blown-out highlights into stunning shots with incredible dynamic range. This transformation happens in-camera, eliminating the need for post-processing techniques like Photoshop, stacking multiple frames, or HDR.Outdoor photographers often grapple with dynamic range issues. While the human eye can perceive a dynamic range of over 20-stops, a mid-day outdoor scene may range between 15-18 stops. Professional camera systems typically offer a range between 12-14 stops. The X4 GND filter bridges this gap, expanding your camera's dynamic range to more closely match what the human eye can see.The X4 GND filter works by decreasing highlight zones, akin to how the Zone System by Ansel Adams operates in the darkroom. While post-processing techniques like HDR can mimic expanded dynamic range, they often sacrifice the long exposure element that is crucial to capturing the best sunset scenes.The X4 GND filter is a new generation of GND, building on the legacy of American-made Singh-Ray GND filters, known for their unparalleled color neutrality and high-quality CR-39 optical resin. The X4 GND filter takes this a step further, introducing SCHOTT B270 optical glass for superior durability and resolving power. This tempered glass GND filter is incredibly robust, resisting breakage even when dropped onto hard surfaces.The X4 GND filter also boasts impressive structural hardness, preventing warping - a common issue with traditional resin filters over time, especially when not stored flat. This structural integrity ensures no distortion, even on wide-angle full-frame setups.Each X4 GND filter features our state-of-the-art MRC16 and nanotec coatings on both sides of the optical surface. These coatings reduce surface reflection and make handling and cleaning the glass surface a breeze. The nanotec coatings also allow the X4 GND filter to glide smoothly in the holder. The edges of each X4 GND are milled smooth and coated with a protective layer for added durability.Every X4 GND filter comes with a protective diamond case. These cases are sturdy, user-friendly, and prevent damage when stored in your bag. They also come in unique colors for easy identification. Experience the difference with the 100x150mm 3-Stop Hard Reverse X4 Graduated Neutral Density Filter, the world's sharpest and most color-neutral GND filter.

Make your photography stand out with the unparalleled clarity of the 52mm X4 UV Filter, renowned as the world's sharpest protection filter. Guaranteed to elevate your image quality, the X4 UV filter by Breakthrough Photography is engineered with state-of-the-art MRC16 and nanotec nano coating layers, ensuring that every shot meets the exacting standards of professional outdoor photographers.Crafted with the critically acclaimed SCHOTT Ultrawhite B270 optical glass from Germany, the X4 UV filter boasts an exceptional optical resolution. The advanced multi-resistant coating, featuring 16 layers (MRC16), not only enhances light transmission to an impressive 99.4% but also fortifies the filter with a protective layer that surpasses the hardness of the glass itself.Innovation doesn't stop there; the nanotec Nano Coating technology on both sides of the filter actively repels dirt, water, and other elements by beading rather than absorbing. This cutting-edge feature ensures that maintenance is quicker and more efficient, allowing you to focus on capturing the perfect shot.Breakthrough Photography has reimagined the design of the traditional UV filter to meet the demands of modern photography. The X4 UV filter is meticulously machined from brass, a material chosen for its superior strength compared to aluminum. This choice ensures less binding and jamming when used with lenses or other filters, providing a solid, reliable attachment to your camera gear.The X4 UV filter's innovative traction frame design is a game-changer for photographers. The full traction texture encircling the filter allows for effortless, secure attachment and removal, even when stacking with additional filters. This thoughtful design addresses the practical needs of photographers who frequently adjust their gear in dynamic environments.With its ultra-slim, double-threaded 3.2mm Traction Frame, the X4 UV filter promises no vignetting or light falloff, even on full-frame wide-angle setups. It's compatible with all your lens caps and additional filters, ensuring a seamless integration into your photography kit.Elevate your lens protection and image quality with the 52mm X4 UV Filter, a testament to Breakthrough Photography's commitment to innovation, quality, and the needs of professional photographers.

The 82mm X4 UV Traction Filter, with its brass frame, Schott glass, and Nanotec coating, is a testament to superior optical technology. This high-quality filter is renowned for its unparalleled optical resolution, surpassing all other protection filters in the market. Engineered by Breakthrough Photography, the X4 UV filter incorporates state-of-the-art MRC16 and nanotec nano coating layers. These uniformly applied layers enhance light transmission up to 99.4%, creating a protective shield that's structurally harder than the glass itself. This innovative design ensures the filter can withstand the rigors of professional outdoor photography.The X4 UV filter features SCHOTT Ultrawhite B270 optical glass, made in Germany, known for its critically sharp imaging capabilities. This durable glass offers high optical clarity and resistance to scratches and abrasions, making it an effective tool for photographers.The nanotec Nano Coating layer, built into both sides of the filter, repels dirt, water, and other elements by beading rather than absorbing. This makes cleaning the filter faster and easier than ever before, ensuring you can focus on capturing the perfect shot.The X4 UV filter's design is a breakthrough in filter technology. It features a full traction texture around its entire circumference, making it easier to securely attach and remove. This filter is machined from brass, stronger than aluminum, providing a more reliably solid feel and less binding and jamming on lenses and with other filters.The X4 UV filter also features an ultra-slim double-threaded 3.2mm Traction Frame. This eliminates vignetting and light falloff on full-frame wide-angle setups, while still being compatible with all your lens caps. The double-threaded traction frame will accept all of your filters and existing lens caps, making it a versatile addition to your photography equipment.Every X4 UV filter comes with a unique serial number laser engraved onto the interior frame. This allows Breakthrough Photography to provide personalized support and confirm the authenticity of the product. With every purchase, Breakthrough Photography also contributes 5% directly to non-profits, demonstrating their commitment to making the world a better place. In summary, the 82mm X4 UV Traction Filter is a professional, innovative, and high-quality tool designed to enhance your photography experience and protect your camera lens from the harmful effects of UV light.

Just when you thought your landscape photography couldn't get any more breathtaking, the 77mm 15-Stop X4 Neutral Density Filter by Breakthrough Photography elevates your craft to new heights. This high-quality ND filter is the epitome of innovation, combining meticulous research with advanced manufacturing techniques to deliver the most color-neutral results for the discerning photographer.Crafted with SCHOTT Superwhite B270 optical glass, renowned for its ultra-clear properties and superior light transmission across the ultraviolet, visible, and infrared spectrums, this filter ensures exceptional image quality. The continuous draw glass manufacturing process results in a high surface quality that is perfectly compatible with our state-of-the-art MRC and nanotec coatings.Our proprietary MRC16 coating, applied to both surfaces of the glass, enhances durability and reduces reflections. This multi-resistant coating is structurally harder than the glass itself, ensuring less light is lost and stray light is minimized. The outcome is a noticeable improvement in image contrast and color fidelity, setting your work apart from the rest.The X4 ND filter is not just effective; it's also built to last. Designed as a workhorse for fieldwork, it's engineered to endure extreme environmental conditions, from gusty winds and saltwater to dust and debris. The weather-sealed construction guarantees that your filter will remain reliable in even the most challenging shooting scenarios.Incorporating our cutting-edge nanotec Nano Coatings Technology, the X4 ND ensures that water and other elements bead rather than absorb and smear, maintaining the pristine quality of your images. This attention to detail is what makes the X4 ND filter a versatile and essential tool for photographers and videographers alike.Our commitment to excellence is backed by a 25 Year Ironclad Guarantee, supported by US-based customer service through phone, email, and live chat. We stand firmly behind the performance and durability of our filters.The X4 ND filter boasts the flattest transmission curve of any ND filter on the market, ensuring the most color-neutral results. Unlike traditional ND filters that often exhibit a blue or magenta cast, especially at higher densities, our alternative manufacturing method has overcome this common pitfall, delivering a filter that maintains a controlled and flat transmission throughout the visible spectrum and into IR.A breakthrough in design, the filter frame has been reimagined from the ground up. The high-quality brass CNC machined frame with our signature traction design allows for easy attachment and removal, even in cold conditions while wearing gloves.Choose the 77mm 15-Stop X4 Neutral Density Filter for its unparalleled color neutrality, high surface quality, and robust construction. It's the reliable choice for photographers who demand the best in color fidelity and image clarity, no matter where their passion takes them.

With the 49mm 6-Stop X4 Neutral Density Filter, you can capture the world in its true colors. This filter, a result of our groundbreaking research and innovative manufacturing methods, is the most color-neutral ND filter designed for the discerning landscape photographer. The X4 ND filter is crafted with SCHOTT Superwhite B270 optical glass, an ultra-clear crown glass produced by melting high-purity raw materials and using the continuous draw process. This process ensures excellent transmission in the ultraviolet, visible, and infrared spectrums, and a high surface quality that accepts our state-of-the-art MRC and nanotec coatings exceptionally well. Our proprietary MRC16, a multi-resistant coating, is applied to both surfaces of the glass disk to reduce reflection and increase surface durability. This coating is structurally harder than the glass itself, and the reduced reflections improve efficiency as less light is lost. The result is better contrast and color in your images, thanks to the elimination of stray light. The X4 ND filter is not just about superior image quality; it's also built to last. We designed this filter to be a workhorse for field work, capable of withstanding extreme wind, salt water, dust, and other abrasive conditions and elements. Incorporating our state-of-the-art nanotec Nano Coatings Technology, the X4 ND filter repels water and other elements rather than absorbing and smearing them. This feature ensures your filter stays clean and functional, even in challenging weather conditions. Unlike many neutral density filters on the market that exhibit a strong blue or magenta cast, the X4 ND filter offers the most color-neutral performance. This is achieved through an alternative manufacturing method to the conventional oven process. The X4 ND filter also boasts a flat transmission curve, indicating a perfectly color-neutral result. While no ND filter can claim to be perfectly neutral, the X4 ND filter guarantees the most color-neutral and flattest transmission curve of any ND filter. The X4 ND filter's design is a breakthrough in itself. The high-quality brass CNC machined frame, with our signature traction frame, makes the filter easy to attach and remove securely, even in cold conditions with gloves on. In conclusion, the 49mm 6-Stop X4 Neutral Density Filter is not just a tool, but a promise of optimal clarity and color neutrality for 25 years, even in the harshest of conditions.

Before you embark on your next landscape photography adventure, consider the 52mm 6-Stop X4 Neutral Density Filter, a product of our innovative research and alternative manufacturing methods. This ND filter, renowned for its unparalleled color neutrality, is a must-have for discerning photographers seeking to capture the world in its truest hues. The X4 ND filter is not just about color accuracy. We've reimagined the filter frame, creating a design that's as practical as it is durable. The result is the world's sharpest ND filter, guaranteed. At the heart of the X4 ND filter lies SCHOTT Superwhite B270 optical glass. This ultra-clear crown glass is crafted by melting high-purity raw materials and using the continuous draw process. The outcome is a filter with exceptional transmission in the ultraviolet, visible, and infrared spectrums, and a high surface quality that readily accepts our advanced MRC and nanotec coatings. Our proprietary MRC16 is a state-of-the-art multi-resistant coating applied to both surfaces of the glass disk. This coating reduces reflection, increases surface durability, and enhances efficiency by minimizing light loss. The reduction of reflections also eliminates stray light, resulting in improved contrast and color in your images. Designed to be a workhorse for field work, the X4 ND filter is weather-sealed to withstand extreme wind, salt water, dust, and other abrasive conditions. Our state-of-the-art nanotec Nano Coatings Technology ensures that water and other elements bead rather than smear, maintaining the filter's clarity and performance. Unlike many neutral density filters on the market that exhibit a strong blue or magenta cast, the X4 ND filter boasts the most color neutral performance. This is achieved through an alternative manufacturing method to the conventional oven process. The X4 ND filter also stands out for its flat transmission curve, a testament to its color neutrality. While no ND filter can claim perfect neutrality, the X4 ND filter guarantees the flattest transmission curve of any ND filter. The filter frame of the X4 ND filter is a breakthrough design, constructed of high-quality brass and CNC machined with our signature traction frame. This makes the filter easy to attach and remove securely, even in cold conditions with gloves on. In conclusion, the 52mm 6-Stop X4 Neutral Density Filter is more than just an accessory; it's a commitment to optimal clarity and color neutrality for 25 years, even in the harshest of conditions.

Breakthrough Photography X2 CPL features critically sharp AGC glass made in Japan, the most color neutral performance of any circular polarizer available and their all-new traction frame design. • Critically sharp AGC glass made in Japan • State-of-the-art 8-layer multi-resistant coating eliminates flaring and ghosting • Made in the USA, Breakthrough Photography polarizing film has the most color neutral results of any CPL filter • nanotec nano coating layers repel dust, water and other elements making it faster to clean • Unique ultra-slim traction frame design with edge traction with the smoothest rotation of any CPL • 25 Year Ironclad Guarantee with U.S-based support Edge Traction Traditional standard flat black polarizers have smooth surfaces and are often difficult to rotate, so when Breakthrough Photography set out to design a circular polarizer they wanted to make it as easy as possible to rotate the front ring, without having excess play. Breakthrough Photography found that by CNC machining traction directly into the sides of the filter frame photographers could easily get filters on and off securely. But with polarizers the primary problem is the ease of rotation. To make rotation as effortless as possible they experimented with many different prototypes and the prototypes with edge traction won photographers over. By having edge traction it's a lot easier to rotate with just one finger, which can be especially useful when a lens hood is attached. Durable By Design Like Breakthrough Photography X2 ND and UV, the X2 CPL is CNC machined with environmentally friendly aluminum to be incredibly durable, yet from the moment you pick it up you'll notice how astonishingly light it is. Weather-sealed construction means your lens stays protected from the elements and with their nanotec coating water, dust and other elements repel rather than stick. The X2 CPL is also double-threaded which allows for easy filter stacking and is fully compatible with all of your lens caps.

For professional landscape photographers seeking the pinnacle of optical precision, the 46mm 6-Stop X4 Neutral Density (ND) Filter represents the zenith of color fidelity and durability. Developed through groundbreaking research and innovative manufacturing techniques, this ND filter boasts an unparalleled color neutrality, ensuring that your captured images reflect true-to-life hues without the unwanted color casts that often plague lesser quality filters.At the heart of the X4 ND's superior performance is the SCHOTT Superwhite B270 optical glass. This ultra-clear crown glass is crafted through a meticulous continuous draw process, using high-purity raw materials to achieve exceptional transmission across the ultraviolet, visible, and infrared spectrums. The result is a filter with a pristine surface quality that is perfectly primed to receive our advanced MRC and nanotec coatings.Our MRC16 coating is a testament to our commitment to excellence. Applied to both surfaces of the glass, this multi-resistant coating significantly diminishes reflections and augments surface durability, surpassing the hardness of the glass itself. By minimizing lost light due to reflections, the MRC16 coating enhances image efficiency, contrast, and color, delivering a noticeable improvement in image quality.Durability is a cornerstone of the X4 ND filter design. Engineered to be a reliable companion for fieldwork, it is resilient against the most challenging environmental conditions, including extreme wind, saltwater, dust, and other abrasive elements. The nanotec Nano Coatings Technology further fortifies the filter by repelling water and resisting smearing, ensuring that your photography is never compromised by the elements.Our 25 Year Ironclad Guarantee underscores our confidence in the X4 ND filter. We provide comprehensive US-based support through phone, email, and live chat, ensuring that you have the assistance you need for a quarter of a century.The quest for the world's most color-neutral ND filter culminated in a radical departure from conventional oven-based manufacturing. Our alternative method has produced a filter with the flattest transmission curve, as verified by spectrometer testing. Unlike traditional ND filters, which often exhibit a pronounced infrared transmission starting at 700nm, the X4 ND maintains a consistent and controlled transmission throughout the visible spectrum and into the infrared range.Innovation extends to the physical design of the X4 ND filter. The high-quality brass frame, CNC machined with our signature traction frame, offers unparalleled ease of attachment and removal, even in challenging weather conditions. The traction design ensures a secure grip, allowing for quick and effortless filter changes.In summary, the 46mm 6-Stop X4 Neutral Density Filter is not just a tool but a testament to the relentless pursuit of optical perfection. It is designed to empower photographers to capture the world with absolute color accuracy...

You'll experience unparalleled optical clarity with the X4 Circular Polarizer Filter, a pinnacle of innovation from Breakthrough Photography. This high-quality 72mm filter boasts an American-made CPL film, meticulously crafted in California to ensure the most color-neutral results possible. Unlike standard filters that often impart a yellow cast due to their transmission properties, the X4 CPL's film is engineered to deliver a controlled transmission decrease from 600nm onward, maintaining color fidelity throughout the infrared spectrum.The X4 CPL's superior design is evident in its brass traction frame, which not only enhances durability but also provides best-in-class handling for photographers in the field. Despite some users noting the ring's stiffness in varying temperatures, the filter's construction is solid, with machined notches that facilitate easy adjustments, even with deep lens hoods.Breakthrough Photography's commitment to excellence is further demonstrated by their use of SCHOTT Superwhite B270 optical glass. This ultra-clear glass ensures excellent light transmission across the ultraviolet, visible, and infrared spectrums, while the surface quality is optimized for the application of Breakthrough Photography's advanced MRC and nanotec coatings.The state-of-the-art multi-resistant coating (MRC16) applied to the X4 CPL filter enhances its effectiveness by reducing reflections and increasing surface durability. This innovative coating is harder than the glass itself, ensuring that less light is lost and the contrast of your images is significantly improved. The nanotec Nano Coatings Technology further protects the filter by repelling water and other elements, preventing absorption and smearing.Designed for the outdoor photographer, the X4 CPL is a versatile tool that expands your camera's dynamic range in-camera. It allows you to control glare, add vibrancy, and reveal hidden details in your shots that would otherwise remain unseen. The filter's weather-sealed construction ensures it can withstand extreme conditions, from wind and saltwater to dust and abrasive elements.Backed by Breakthrough Photography's 25 Year Ironclad Guarantee, the X4 CPL filter is supported by US-based customer service, offering phone, email, and live chat assistance. This durable, effective, and innovative filter is guaranteed to be the world's sharpest CPL filter, ensuring that your images are warm, lively, and free of color cast.Choose the X4 Circular Polarizer Filter for its unparalleled color neutrality and robust construction, making it an essential addition to any photographer's gear for capturing the true essence of the world around them.