Lens

The Shelyak eShel lens version is a comprehensive echelle spectroscope system designed for advanced astronomical spectroscopy. Drawing on Shelyak’s extensive experience with instruments like the Lhires III and Lhires Lite, as well as practical observing sessions with MuSiCoS and Narval spectroscopes, the eShel offers a robust and efficient solution for high-resolution spectroscopic studies.

The Tecnosky UWA 82° 28mm eyepiece is designed for astronomers seeking a wide, immersive field of view and high optical performance. With an impressive 82-degree apparent field and fully multi-coated optics, this eyepiece offers sharp, bright images across the entire view. Its robust construction, comfortable eye relief, and compatibility with 2" focusers make it suitable for deep-sky and wide-field observations. The eyepiece also features a rotatable adjustable eyecup and a filter thread for added versatility.

The Tecnosky UWA 82° 16mm eyepiece is designed for astronomers who want a wide, immersive field of view paired with high-quality optics. With an 82-degree apparent field, this eyepiece is ideal for deep-sky and wide-field observations, providing sharp and bright images thanks to its fully multi-coated lenses. Its robust construction includes a rotatable, adjustable eyecup and a filter thread for added convenience. The eyepiece is compatible with standard 2" focusers and offers comfortable eye relief for extended viewing sessions.

The Tecnosky UWA 82° 4mm eyepiece is crafted for astronomers who seek high magnification and a wide, immersive field of view. With an impressive 82-degree apparent field and fully multi-coated optics, this eyepiece delivers sharp, bright images-ideal for lunar, planetary, and high-resolution deep-sky observations. Its robust design includes a rotatable, adjustable eyecup and a filter thread for added versatility. The eyepiece is compatible with 2" focusers and offers comfortable eye relief, making it suitable for extended observing sessions.

The Tecnosky XWA 13mm 100° eyepiece is designed for astronomers who want an exceptionally wide and immersive field of view. With a 100-degree apparent field, this eyepiece is perfect for deep-sky and panoramic observations, providing a truly expansive visual experience. Its advanced optical design features fully multi-coated lenses for bright, sharp images, and it is compatible with both 1.25" and 2" focusers. The eyepiece also includes practical features such as an adjustable eyecup, filter thread, and inert gas filling for durability.

The Tecnosky XWA 7mm 100° eyepiece is built for astronomers who want high magnification paired with an ultra-wide, immersive field of view. With a 100-degree apparent field, this eyepiece is ideal for detailed planetary, lunar, and deep-sky observations, providing a truly expansive and engaging visual experience. Its advanced optical system features fully multi-coated lenses for sharp, bright images and is compatible with both 1.25" and 2" focusers.

The Tecnosky XWA 9mm 100° eyepiece is designed for astronomers who want to combine high magnification with an exceptionally wide field of view. With a 100-degree apparent field, this eyepiece is ideal for both planetary and deep-sky observations, offering an immersive and panoramic visual experience. Its advanced optical system features nine fully multi-coated lenses arranged in six groups, ensuring sharp, bright, and high-contrast images.

The Tecnosky Four Elements 2x Apo-Barlow 1.25" is a high-quality Barlow lens designed to double the magnification of your existing eyepieces without sacrificing image quality. Featuring a four-element apochromatic optical design, this Barlow lens ensures sharp, color-corrected views with minimal distortion. Its fully multi-coated optics maximize light transmission, and the 1.25" connection makes it compatible with most standard telescopes and eyepieces.

The Tecnosky Flattener/Reducer 0.8x is an optical accessory designed specifically for 70mm and 72mm ED apochromatic refractor telescopes. Its primary function is to reduce the focal length by a factor of 0.8x, providing a wider field of view and faster imaging for astrophotography. The integrated field flattener ensures sharp stars across the entire image, making it ideal for capturing high-quality, wide-field photographs. With standard M63 and M48 connections, it easily integrates with compatible telescopes and cameras.

The Tecnosky Flattener/Reducer 0.8x OWL 180 SLD is a specialized optical accessory designed to enhance astrophotography with the OWL 180 SLD Triplet Apo telescope. By reducing the focal length by a factor of 0.8x, it provides a wider field of view and faster imaging, making it ideal for capturing expansive sky areas. The four-element, fully multi-coated optical system ensures excellent light transmission and sharpness across the entire image.

The Tecnosky Four Elements Flattener/Reducer 0.8x is specifically designed for refractor telescopes with focal lengths between 400 mm and 600 mm, making it an excellent match for models such as the Tecnosky ED70, ED80, EDT80, and 80 Apo Triplet. Its advanced four-element optical design provides superior field and color correction, ensuring sharp, high-quality images across the entire field of view. This accessory fits directly into a standard 2" eyepiece holder and features a classic T2 (M42x0.75 mm) thread on the camera side.

The Tecnosky FullFrame 2.5" RED 130 V2 is a high-quality field flattener designed for use with 130mm triplet apochromatic refractor telescopes. Its primary purpose is to correct field curvature, ensuring sharp, flat images across the entire sensor, especially for full-frame astrophotography. With standard M68 and M48 connections, this flattener integrates easily with most telescope and camera setups. The 55 mm backfocus and built-in filter thread provide added convenience for astrophotographers seeking optimal performance and flexibility.

The Tecnosky Reducer 0.67x is an optical accessory designed to shorten the focal length of Ritchey-Chrétien (RC) telescopes, making them faster and providing a wider field of view for astrophotography. With a reduction factor of 0.67x, this reducer allows users to capture larger portions of the sky in a single image, which is especially useful for deep-sky imaging. The reducer features standard 2" and M48x0.75 connections for easy integration with most telescopes and cameras, and its generous backfocus of 85 mm offers flexibility for various imaging setups.

The Tecnosky Variable Flattener 1.0x Full Frame is designed to provide edge-to-edge sharpness for full-frame astrophotography when used with a range of Tecnosky apochromatic refractor telescopes. This flattener is compatible with models featuring apertures of 80, 90, 102, 115, 130, and 152 mm, making it a versatile choice for many setups. With standard M63 and M48x0.75 connections, it integrates easily with most telescopes and cameras. The 55 mm backfocus and built-in filter thread ensure convenient and flexible use for demanding imaging applications.

The Tecnosky Variable Flattener 1.0x M48 is an optical accessory designed to correct the natural field curvature produced by refractor telescopes. Without a flattener, stars at the edge of the image may appear distorted or less sharp compared to those in the center. By installing this field flattener between the telescope and the camera, astrophotographers can achieve sharp, pinpoint stars across the entire image, resulting in higher-quality astrophotography. This accessory is particularly useful for refractors with focal lengths between 400 mm and 1000 mm.

The Tecnosky Adjustable Flattener Reducer FF 0.8x is an optical accessory designed to improve astrophotography by correcting the natural field curvature produced by telescope optics. Without a flattener, stars near the edge of the image may appear distorted or blurry, reducing overall image quality. By installing this field flattener between your telescope and camera, you can achieve sharp, pinpoint stars across the entire field, even at the edges.

The TeleVue Powermate 2x 2" Barlow lens is a premium magnification accessory designed to deliver sharp, high-contrast images across the entire field of view. Based on Al Nagler's innovative 4-element design, the Powermate maintains the full eye relief of long focal length eyepieces even at higher powers, providing both comfort and clarity. The unique optical system consists of a negative doublet and a positive "pupil-correcting" doublet, which together eliminate the common limitations of traditional Barlow lenses by restoring field rays to their original direction.

This Powermate lens, designed by Al Nagler, uses a four-element optical system to provide sharp images across the entire field and excellent control of aberrations. It is ideal for those who value long eye relief, allowing you to use long focal length eyepieces at high magnification without losing comfort. For example, you can enjoy the sharpness and comfort of a 32mm Plössl eyepiece at up to five times the power.

This high-quality Barlow lens is designed to enhance your observing experience in several ways. It increases the magnification of your telescope, slows the focal ratio for improved eyepiece sharpness, and helps correct eyepiece aberrations. TeleVue Barlows are made with multi-coated high-index glass, ensuring optimal aberration correction and outstanding contrast with minimal light loss. The performance remains aberration-free, even when used with fast f/4 telescopes.

This reducer is designed to decrease the effective focal length of your telescope, resulting in a wider field of view and faster imaging times, which is especially beneficial when photographing nebulae and galaxies. The 0.8x reducer shortens the focal length to 80% of its original value and is optimized for use with cameras up to APS-size (27mm diagonal).

The TeleVue 0.8x NPR Reducer is an optical accessory designed to shorten the effective focal length of compatible telescopes, making it ideal for astrophotography. By reducing the focal length, it allows for a wider field of view and faster imaging, which is especially useful for capturing extended objects such as nebulae and galaxies. This reducer is specifically made for use with TeleVue NP101is and NP127is telescopes and is optimized for photographic applications.

The TS Optics Ultra-Series 1.25", 10mm, 100° eyepiece is designed for amateur astronomers who want a wide, immersive field of view and comfortable eye relief. This eyepiece is part of the 100° Ultra-Series, offering exceptional optical performance with a modern, multi-element design. Its robust construction and advanced coatings make it suitable for both planetary and deep-sky observations. The eyepiece is compatible with any telescope that accepts 1.25" accessories.

The TS Optics Ultra-Series 2", 15mm, 100° eyepiece is designed for astronomers who want a wide, immersive view and comfortable eye relief during their observations. Part of the 100° Ultra-Series, this eyepiece features a modern optical design with multiple lens elements and coatings for sharp, high-contrast images. Its robust construction and 2" barrel make it compatible with a wide range of telescopes, especially those used for deep-sky and wide-field viewing.

The TS Optics Ultra-Series 2", 21mm, 100° eyepiece is crafted for astronomers who appreciate an expansive, immersive field of view and comfortable eye relief. As part of the 100° Ultra-Series, this eyepiece uses a sophisticated optical design with multiple elements and coatings, delivering sharp, high-contrast images across the entire field. Its 2" barrel ensures compatibility with a wide range of telescopes, making it especially suitable for deep-sky and wide-field observations.