19 products were found matching your search for Astigmatism in 3 shops:

Under the banner of enhancing your astronomical viewing experience, the DIOPTRX Astigmatism Correcting Lens - 3.50 is a revolutionary product designed to compensate for astigmatism. This innovative accessory is specifically engineered to attach and lock onto the tops of more than 20 long eye-relief Tele Vue eyepieces, ensuring the sharpest full-field viewing possible. The DIOPTRX models are available in precise 1/4 diopter increments, ranging from 1/4 up to 3.5 diopters. These lenses are rotatable, allowing you to adjust them to the best orientation for your viewing comfort. A series of engraved letters on the barrel serves as a guide to monitor orientation. To select the perfect DIOPTRX model, simply match it with your eyeglass prescription for astigmatism. Each lens is crafted from multi-coated glass, housed in anodized aluminum with rubber eyeguards for durability and comfort. Tele Vue has a long-standing commitment to overcoming the limitations that hinder the visual experience in astronomy. This includes the limitations of the observing location, the telescope, the eyepiece, and our eyesight. The DIOPTRX Astigmatism Correcting Lens - 3.50 is a testament to this commitment, designed to overcome the common issue of astigmatism. Just as Dobsonian owners experienced enhanced performance with the installation of the Paracorr to compensate for mirror coma, the DIOPTRX Astigmatism Correcting Lens - 3.50 offers a similar solution for those with astigmatism. This accessory is designed to extract the maximum visual performance by matching your eyesight to the eyepiece. The DIOPTRX lenses are compatible with all long eye-relief Tele Vue eyepieces recommended for digiscoping, including the 31mm Nagler type 5, 26mm Nagler type 5, 35mm Panoptic, 27mm Panoptic, 22mm Panoptic, 55mm Plossl, 40mm Plossl, 32mm Plossl, all Radians (18mm through 3mm), all Nagler type 4 (22mm, 17mm, 12mm), and the 8 - 24mm Dioptrx Ready Zoom Eyepiece. In conclusion, the DIOPTRX Astigmatism Correcting Lens - 3.50 is a game-changer for astronomy enthusiasts, offering a solution to astigmatism and enhancing the overall viewing experience.

Discover the pinnacle of visual clarity with the Tele Vue DIOPTRX Astigmatism Correcting Lens - 3.00, a precision-engineered optical accessory designed to enhance your astronomical viewing experience. This innovative lens is specifically crafted to correct astigmatism, allowing you to achieve the sharpest full-field viewing possible through your telescope.The DIOPTRX lens is a testament to Tele Vue's commitment to high-quality, user-friendly, and durable astronomy equipment. It seamlessly attaches and securely locks onto the tops of over 20 long eye-relief Tele Vue eyepieces, ensuring a stable and optimized viewing session. With its versatile design, the DIOPTRX lens is rotatable, enabling fine-tuning to the best orientation for your unique vision needs. Engraved letters on the barrel provide a convenient reference to monitor this alignment with ease.Crafted from multi-coated glass housed in anodized aluminum with a comfortable rubber eyeguard, the DIOPTRX lens is built to last and designed for the discerning astronomer who demands the best in optical performance. The lens is available in 1/4 diopter increments, ranging from 1/4 up to 3.5 diopters, allowing you to select the model that precisely matches your eyeglass prescription for astigmatism correction.Tele Vue's DIOPTRX lenses are compatible with a wide array of eyepieces, including the renowned Nagler, Panoptic, Plossl, Radian, and the versatile 8 - 24mm Dioptrx Ready Zoom Eyepiece. This compatibility ensures that whether you're digiscoping or simply stargazing, you can enjoy an uncompromised visual experience.By addressing the common issue of astigmatism, Tele Vue's DIOPTRX Astigmatism Correcting Lens - 3.00 empowers you to transcend the limitations of your eyesight, offering a solution that was once only achievable with prescription eyewear. Experience the universe with newfound clarity and immerse yourself in the wonders of the night sky with this essential accessory for any serious astronomer.

Under the banner of Tele Vue, a brand renowned for its high-quality optical products, comes the DIOPTRX Astigmatism Correcting Lens - 2.25. This innovative lens is designed to correct astigmatism, a common issue that can cause blurry or distorted images when using optical instruments. Unlike your telescope's focuser, which compensates for near- or far-sightedness, the DIOPTRX lens specifically targets astigmatism. It securely attaches and locks onto the tops of over 20 long eye-relief Tele Vue eyepieces, ensuring the sharpest full-field viewing experience possible. Available in 1/4 diopter steps, from 1/4 up to 3.5 diopters, the DIOPTRX models are rotatable for optimal orientation. A series of engraved letters on the barrel aids in monitoring the orientation. Simply select the DIOPTRX model that aligns with your eyeglass prescription for astigmatism. Constructed with multi-coated glass encased in anodized aluminum housings, these lenses are both durable and reliable. They come equipped with rubber eyeguards for added comfort. Tele Vue has always been committed to overcoming the limitations of astronomical viewing. This includes the limitations of the observing location, the telescope, the eyepiece, and our eyesight. The DIOPTRX Astigmatism Correcting Lens is a testament to this commitment, specifically designed to overcome the limitation of astigmatism. The DIOPTRX lenses can be attached to the top of all long eye-relief Tele Vue eyepieces, including those recommended for digiscoping. This includes the 31mm Nagler type 5, 26mm Nagler type 5, 35mm Panoptic, 27mm Panoptic, 22mm Panoptic, 55mm Plossl, 40mm Plossl, 32mm Plossl, all Radians (18mm thru 3mm), all Nagler type 4 (22mm, 17mm, 12mm), and the 8 - 24mm Dioptrx Ready Zoom Eyepiece. Experience the difference with the DIOPTRX Astigmatism Correcting Lens - 2.25, and unlock the maximum visual performance from your eyepiece.

Your telescope's focuser is used to compensate for your near- or far-sightedness;DIOPTRX compensates for your astigmatism. These units attach and lock onto the tops of over 20 long eye-relief Tele Vue eyepieces to achieve the sharpest full-field viewing possible. DIOPTRX models are available in 1/4 diopter steps, from 1/4 up to 3.5 diopters, and are rotatable for tuning to the best orientation. A series of engraved letters on the barrel helps to monitor orientation. Simply choose the DIOPTRX model that matches your eyeglass prescription for astigmatism. All lenses are multi-coated glass in anodized aluminum housings with rubber eyeguardsThe visual experience in astronomy is maximized by stripping away limitations:• the limitations of the observing location (dark skies and steady seeing)• the limitations of the telescope (aperture, field, resolution and contrast)• the limitations of the eyepiece (field, resolution and contrast)• the limitations of our eyesight (e.g., astigmatism)Tele Vue has historically been dedicated to overcoming the first three of these limitations:• with wide angle, flat field telescopes easily portable for traveling to great observing locations• matching ultra-wide angle eyepieces with full field image quality to generate what we call "spacewalk" viewing• and a variety of long eye relief eyepieces to allow eyeglass wearers to enjoy the maximum visual experienceTo overcome the fourth limitation (astigmatism), Tele Vue has developed a corrector which fits directly onto the eyepiece. Just as Dobsonian owners could not fully appreciate the performance of Tele Vue eyepieces until installing the Paracorr to compensate for mirror coma, the majority of the population (which has some eyesight limitations due to astigmatism) had no way to correct for this except by wearing eyeglasses. That is, until now. Introducing the DIOPTRX Astigmatism Correcting Lens Accessory, which extracts the maximum visual performance from matching eyesight to eyepiece.Tele Vue DIOPTRX lenses attach to the top of all long eye-relief Tele Vue eyepieces to compensate for eyesight astigmatism and are available in 1/4 diopter steps, from 1/4 diopter up to 3.5 diopters.DIOPTRX lenses will apply to all Tele Vue eyepieces recommended for digiscoping (because of their long eye relief):• 31mm Nagler type 5• 26mm Nagler type 5• 35mm Panoptic• 27mm Panoptic• 22mm Panoptic• 55mm Plossl• 40mm Plossl• 32mm Plossl• All Radians (18mm thru 3mm) _• All Nagler type 4 (22mm, 17mm, 12mm)• 8 - 24mm Dioptrx Ready Zoom Eyepiece

While your telescope's focuser adjusts for near- or far-sightedness, the DIOPTRX Astigmatism Correcting Lens - 1.50 is designed to compensate for astigmatism, enhancing your visual experience. This innovative lens accessory securely attaches to over 20 long eye-relief Tele Vue eyepieces, enabling the sharpest full-field viewing possible. Available in 1/4 diopter increments, ranging from 1/4 to 3.5 diopters, the DIOPTRX models are rotatable, allowing for fine-tuning to the optimal orientation. The barrel features a series of engraved letters to assist in monitoring the orientation. Simply select the DIOPTRX model that aligns with your eyeglass prescription for astigmatism. Each lens is crafted from multi-coated glass housed in anodized aluminum with rubber eyeguards, ensuring durability and high-quality performance. Tele Vue, a trusted name in the field of astronomy, has developed this astigmatism corrector to overcome the limitations of eyesight, enhancing the visual experience for astigmatism sufferers. The DIOPTRX Astigmatism Correcting Lens - 1.50 is designed to maximize visual performance by matching your eyesight to your eyepiece. It fits directly onto all long eye-relief Tele Vue eyepieces, including those recommended for digiscoping due to their long eye relief. This includes the 31mm Nagler type 5, 26mm Nagler type 5, 35mm Panoptic, 27mm Panoptic, 22mm Panoptic, 55mm Plossl, 40mm Plossl, 32mm Plossl, all Radians (18mm through 3mm), all Nagler type 4 (22mm, 17mm, 12mm), and the 8 - 24mm Dioptrx Ready Zoom Eyepiece. Experience the difference with the DIOPTRX Astigmatism Correcting Lens - 1.50, the ultimate solution for astigmatism correction in the world of astronomy.

You can now enhance your stargazing experience with the Dioptrx Astigmatism Correcting Lens - 0.50. This innovative product from Tele Vue, a brand synonymous with high-quality optical products, is designed to correct astigmatism, a common issue with eyepieces. Unlike your telescope's focuser, which compensates for near- or far-sightedness, the DIOPTRX lens specifically targets astigmatism. This durable and user-friendly accessory can be easily attached and locked onto the tops of over 20 long eye-relief Tele Vue eyepieces. This ensures the sharpest full-field viewing possible, enhancing your visual experience in astronomy.Available in 1/4 diopter steps, from 1/4 up to 3.5 diopters, these effective lenses are rotatable, allowing you to tune to the best orientation. The barrel features a series of engraved letters to help monitor the orientation. Simply select the DIOPTRX model that matches your eyeglass prescription for astigmatism.Each lens is made from multi-coated glass housed in anodized aluminum, complete with rubber eyeguards. This astigmatism correcting lens accessory is designed to maximize your visual performance by matching your eyesight to the eyepiece. The DIOPTRX lenses are compatible with all long eye-relief Tele Vue eyepieces recommended for digiscoping. This includes the 31mm Nagler type 5, 26mm Nagler type 5, 35mm Panoptic, 27mm Panoptic, 22mm Panoptic, 55mm Plossl, 40mm Plossl, 32mm Plossl, all Radians (18mm thru 3mm), all Nagler type 4 (22mm, 17mm, 12mm), and the 8 - 24mm Dioptrx Ready Zoom Eyepiece.With the DIOPTRX Astigmatism Correcting Lens - 0.50, you can overcome the limitations of astigmatism and enjoy the maximum visual experience that Tele Vue eyepieces offer.

Take your stargazing experience to new heights with the Tele Vue Adapter, meticulously designed to seamlessly integrate Dioptrx Astigmatism Correcting Lenses with your favorite eyepieces. This durable and high-quality adapter is the perfect solution for astronomers who require astigmatism correction to achieve crystal-clear celestial views. It is specifically engineered to fit the 24mm Panoptic, 19mm Panoptic, and 20mm Nagler Type 5 eyepieces, ensuring a snug and secure connection that maintains the exceptional optical performance Tele Vue is known for.Crafted with innovation in mind, this user-friendly adapter allows for quick and easy attachment of Dioptrx lenses, enhancing your viewing comfort without compromising on eye relief. The adapter is particularly effective during nighttime observations when your pupil dilates, allowing for an immersive and uninterrupted gaze into the cosmos.While designed to accommodate the use of Dioptrx lenses in binoviewer applications, it's important to note that the "nose-relief" may be limited when using the 24mm and 19mm Panoptics. However, this versatile adapter can remain permanently affixed to your eyepiece, providing the option to use it with or without the Dioptrx lenses. When not in use with Dioptrx, the adapter maintains a comfortable viewing experience with the larger eyeguard included.Choose the Tele Vue Adapter for its unparalleled compatibility and the assurance of a reputable brand committed to enhancing your astronomical pursuits. Whether you're a seasoned astronomer or a hobbyist seeking to refine your view of the night sky, this innovative adapter is an essential accessory for your astrophotography toolkit.

Your telescope's focuser is used to compensate for your near- or far-sightedness;DIOPTRX compensates for your astigmatism. These units attach and lock onto the tops of over 20 long eye-relief Tele Vue eyepieces to achieve the sharpest full-field viewing possible. DIOPTRX models are available in 1/4 diopter steps, from 1/4 up to 3.5 diopters, and are rotatable for tuning to the best orientation. A series of engraved letters on the barrel helps to monitor orientation. Simply choose the DIOPTRX model that matches your eyeglass prescription for astigmatism. All lenses are multi-coated glass in anodized aluminum housings with rubber eyeguardsThe visual experience in astronomy is maximized by stripping away limitations:• the limitations of the observing location (dark skies and steady seeing)• the limitations of the telescope (aperture, field, resolution and contrast)• the limitations of the eyepiece (field, resolution and contrast)• the limitations of our eyesight (e.g., astigmatism)Tele Vue has historically been dedicated to overcoming the first three of these limitations:• with wide angle, flat field telescopes easily portable for traveling to great observing locations• matching ultra-wide angle eyepieces with full field image quality to generate what we call "spacewalk" viewing• and a variety of long eye relief eyepieces to allow eyeglass wearers to enjoy the maximum visual experienceTo overcome the fourth limitation (astigmatism), Tele Vue has developed a corrector which fits directly onto the eyepiece. Just as Dobsonian owners could not fully appreciate the performance of Tele Vue eyepieces until installing the Paracorr to compensate for mirror coma, the majority of the population (which has some eyesight limitations due to astigmatism) had no way to correct for this except by wearing eyeglasses. That is, until now. Introducing the DIOPTRX Astigmatism Correcting Lens Accessory, which extracts the maximum visual performance from matching eyesight to eyepiece.Tele Vue DIOPTRX lenses attach to the top of all long eye-relief Tele Vue eyepieces to compensate for eyesight astigmatism and are available in diopter steps, from 1/4 diopter up to 3.5 diopters.DIOPTRX lenses will apply to all Tele Vue eyepieces recommended for digiscoping (because of their long eye relief):• 31mm Nagler type 5• 26mm Nagler type 5• 35mm Panoptic• 27mm Panoptic• 22mm Panoptic• 55mm Plossl• 40mm Plossl• 32mm Plossl• All Radians (18mm thru 3mm) _• All Nagler type 4 (22mm, 17mm, 12mm)• 8 - 24mm Dioptrx Ready Zoom Eyepiece

Your telescope's focuser is used to compensate for your near- or far-sightedness;DIOPTRX compensates for your astigmatism. These units attach and lock onto the tops of over 20 long eye-relief Tele Vue eyepieces to achieve the sharpest full-field viewing possible. DIOPTRX models are available in 1/4 diopter steps, from 1/4 up to 3.5 diopters, and are rotatable for tuning to the best orientation. A series of engraved letters on the barrel helps to monitor orientation. Simply choose the DIOPTRX model that matches your eyeglass prescription for astigmatism. All lenses are multi-coated glass in anodized aluminum housings with rubber eyeguardsThe visual experience in astronomy is maximized by stripping away limitations:• the limitations of the observing location (dark skies and steady seeing)• the limitations of the telescope (aperture, field, resolution and contrast)• the limitations of the eyepiece (field, resolution and contrast)• the limitations of our eyesight (e.g., astigmatism)Tele Vue has historically been dedicated to overcoming the first three of these limitations:• with wide angle, flat field telescopes easily portable for traveling to great observing locations• matching ultra-wide angle eyepieces with full field image quality to generate what we call "spacewalk" viewing• and a variety of long eye relief eyepieces to allow eyeglass wearers to enjoy the maximum visual experienceTo overcome the fourth limitation (astigmatism), Tele Vue has developed a corrector which fits directly onto the eyepiece. Just as Dobsonian owners could not fully appreciate the performance of Tele Vue eyepieces until installing the Paracorr to compensate for mirror coma, the majority of the population (which has some eyesight limitations due to astigmatism) had no way to correct for this except by wearing eyeglasses. That is, until now. Introducing the DIOPTRX Astigmatism Correcting Lens Accessory, which extracts the maximum visual performance from matching eyesight to eyepiece.Tele Vue DIOPTRX lenses attach to the top of all long eye-relief Tele Vue eyepieces to compensate for eyesight astigmatism and are available in 1/4 diopter steps, from 1/4 diopter up to 3.5 diopters.DIOPTRX lenses will apply to all Tele Vue eyepieces recommended for digiscoping (because of their long eye relief):• 31mm Nagler type 5• 26mm Nagler type 5• 35mm Panoptic• 27mm Panoptic• 22mm Panoptic• 55mm Plossl• 40mm Plossl• 32mm Plossl• All Radians (18mm thru 3mm) _• All Nagler type 4 (22mm, 17mm, 12mm)• 8 - 24mm Dioptrx Ready Zoom Eyepiece

This adapter will allow you to use Dioptrx Astigmatism Correcting Lenses with Type 6 Nagler eyepieces , because adding Dioptrx to Nagler Type 6 eyepieces makes the eye relief quite tight, we recommend this only for Deep-Sky use, whereyour eye pupil enlarges. Some users might need to back off and lose some field to avoid eyelashes contacting the Dioptrx lens. We do not recommend using Dioptrx with Nagler Type 6 eyepieces in the daytime or bino-viewer applications. (NOTE: All eyepieces with large eyeguards standard, such as Radians, 32mm Plossl and 8-24mm Zoom, can be comfortably used with bino-viewers when Dioptrx is attached). For normal operation of any of these eyepieces without Dioptrx, the adapter can be left permanently attached since operation with the provided larger eyeguard is quite comfortable.

A textbook that presents surgeons with a tailor-made approach to cataract extraction combined with arcuate astigmatic keratotomy using a "minimal touch" technique for the simultaneous correction of pre-existing astigmatic refractive errors at the time of cataract surgery. Thoroughly illustrated. Includes surgical nomograms in an appendix. Annotation copyright Book News, Inc. Portland, Or.

Unread book in perfect condition.

This SIGMA 24mm Lens Sony Fit is an ideal DG lens for Digital SLR cameras; First of all it the lens is capable of Macro photography at minimum focusing down to 18cm; The incorporation of the floating focus system, Minimize s distortion, spherical abberation and astigmatism providing high performance at all shooting distances; It has a reproduction ratio of 1:2:7 which allows you to capture high quality images even the surrounding scenery; In order to obtain adequate peripheral brightness at open aperture, this lens comes with an advanced optical construction; What's more is that the iris diaphragm has 9 blades to obtain beautiful out of focus images in the foreground and background.

Tokina uses an aspherical glass lens in its AF 17mm f/3.5 AT-X PRO. In addition to correcting spherical astigmatism, these lenses fully correct light quantity and distortion at the edge of the image and provide excellent results when used in combination with floating elements.

The Baader Planetarium FCFY-1 Yellow 495 nm Long-Pass Filter has 98% transmission efficiency and is superb for bright planet and cometary details. A fine optical polish and 2 mm thick glass allow this filter to be inserted anywhere into the optical path without introducing astigmatism or other defects. For instance, they can be used in front of a binocular viewer without degrading the image in any way. Substrates are free of striae and plane-parallel polished to within 30 seconds of arc. This eliminates any double images or ghosting due to wedge errors in the glass.The filter cell features the largest clear aperture of any telescope filter on the market for complete freedom from vignetting at any focal length. The front "crown" incorporates milled notches, which makes handling and threading the filter an easy operation in the dark. All surfaces are treated with a 7-layer multi-coating, featuring a mere 0.25% residual reflection.It is the most elaborate coating ever applied onto amateur color filters, resulting in a filter free of any false reflections under any incident angle of light. Light is the hottest commodity for all planetary observation. Especially during high magnification work, whether you have enough light or not is the deciding factor for the recognition of the subtlest planetary surface detail, much more important than a horde of different filters of mediocre execution. The 7-layer MC-coatings not only provide a brighter image, they prevent the softening effect of scattered light. Scattered light kills exactly those subtle features in planetary detail that you are longing to see. Painstaking attention to coatings and perfect optical figuring are simple reasons why the image contrast through these premium filters is so rock-solid.

Take your photography to the next level with the EF 50mm f/1.4 USM Lens, a high-quality, professional-grade lens from Canon. This innovative lens is designed with two high-refraction lens elements and Gaussian optics, which work together to eliminate astigmatism and suppress astigmatic difference. The result is crisp, clear images with minimal flare, even when shooting at the maximum aperture.This reliable and durable lens boasts a 50mm focal length and a wide 1:1.4 maximum aperture, offering a 46-degree diagonal angle of view. With a closest focusing distance of 0.45m or 1.5 ft., this lens is versatile and compact, making it an ideal choice for various photography fields. Whether you're capturing breathtaking landscapes, intimate travel scenes, expressive portraits, or dynamic reportage, this lens delivers exceptional results.Experience the benefits of ultrasonic focusing, driven by an ultrasonic motor that ensures fast, near-silent autofocus. The excellent holding torque guarantees accurate focus point without overshooting, while the full-time manual override allows you to adjust focus without leaving AF mode.The EF 50mm f/1.4 USM Lens also features a virtually circular aperture diaphragm, which creates a smooth, uniform blur in out-of-focus regions. This helps sharp foreground objects stand out against a beautifully blurred background, adding depth and dimension to your photos.Enhance your images further with the Super Spectra coating, designed to ensure accurate color balance and enhance contrast. This coating also reduces flare and ghosting, common issues caused by light bouncing off a camera's sensor. To top it all off, this lens comes with a ProOptic 58mm Multi Coated UV Slim Filter, designed to reduce glare and improve image quality. This lens is compatible with a wide range of Canon DSLR cameras, making it a valuable addition to any photographer's gear.

The Baader Planetarium FCFR-2 Red Long-Pass Filter has a bandpass at 610 nm and is designed for 2" eyepieces. It has 98% transmission efficiency and is superb for bright planet and cometary details. It can be placed anywhere in the optical path without introducing astigmatism or other defects. Baader Planetarium astronomy filters by far supersede the mediocre quality of common "flame polished" color filters. A fine optical polish and 2 mm thick glass allows these filters to be inserted anywhere into the optical path without introducing astigmatism or other defects. For instance, they can be used in front of a binocular viewer without degrading the image in any way.Substrates are free of striae and plane-parallel polished to within 30 seconds of arc. This eliminates any double images or ghosting due to wedge errors in the glass. The filter cell features the largest clear aperture of any telescope filter on the market for complete freedom from vignetting at any focal length.The front "crown" incorporates milled notches, which makes handling and threading the filter an easy operation in the dark. All surfaces are treated with a 7-layer Multi-Coating, featuring a mere 0.25% residual reflection. It is the most elaborate coating ever applied onto amateur color filters, resulting in a filter free of any false reflections under any incident angle of light. Light is the hottest commodity for all planetary observation.Especially during high magnification work, whether you have enough light or not is the deciding factor for the recognition of the subtlest planetary surface detail, much more important than a horde of different filters of mediocre execution. The 7-layer MC-coatings not only provide a brighter image, they prevent the softening effect of scattered light. Scattered light kills exactly those subtle features in planetary detail that you are longing to see. Painstaking attention to coatings and perfect optical figuring are simple reasons why the image contrast through these premium filters is so rock-solid.

This ultra-wide-angle lens has the shortest focal length in the L-series. Element 2 is an aspherical lens to correct distortion. Other aberrations such as astigmatism are also corrected, resulting in ideal image quality. The lens has a fixed, petal-type hood and a gelatin filter holder at the rear.

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