Celestron
Celestron Reducer Lens .7x For EdgeHD 800 ... $550.00
Celestron’s EdgeHD reducers features a custom 4-element optical design engineered to maintain the flat-field performance of our award-winning EdgeHD optical system. Unlike generic reducers, our premium reducers provide substantial back-focus to accommodate an assortment of imaging accessories. Description EdgeHD reducers offer high-index optical elements, including extra-low dispersion, exotic Lanthanum elements, which provide high contrast viewing while minimizing chromatic aberration. All air-to-glass lens surfaces feature multiple layers of coating for maximum light transmission and colour correction and contain blacken edges to minimize internal reflection and maximize image contrast. Incorporating computer assisted CNC machined aluminum housing, for precise spacing and alignment of...
SharpStar
Askar 2.5" F/3.9 Full Frame Reducer for FR... $339.95
Askar provides a brand-new F/3.9 full frame reducer for FRA400 astrograph, further reducing the focal length and thus shortening the exposure time on its original 400 focal length and f/5.6 focal ratio design basis. The reduction factor is 0.7×, and the reduced focal length is 280mm, which can satisfy most deep-sky astrophotography. The back focus is standard 55mm. The reducer has built-in M48×0.75 thread, allowing for the attachment of 2" filters. This reducer also works with the FRA500
SharpStar
Sharpstar F4.5 Reducer for 76EDPH/94EDPH (... $304.95
The 2.5" 76EDPH f/4.5 full-frame reducer is dedicated for Sharpstar 76EDPH astrograph. At one end of the reducer, there is M74×1 thread, tapped for the connection to the 76EDPH’s reducer and at the other end the reducer, there is M48×0.75 thread for the connection of most stock cameras. The back focus is 55mm after the attachment of a camera. Description The reducer is designed with a three-element air-spaced lens structure, supporting full-frame imaging, effectively controlling unwanted vignette. The practical focal ratio of the Sharpstar 76EDPH when used with this reducer is f/4.5, and the focal length can be shortened to...
Celestron
Celestron f/6.3 Reducer Corrector (94175) $256.95
Imagine having two telescopes in one — a long focal length instrument for lunar and planetary work and a short focal length scope for deep sky observing and astrophotography. With the Celestron Reducer/Corrector Lens, that’s precisely what you get. Description Achieve shorter focal length Explicitly designed for Celestron Schmidt-Cassegrain telescopes, this unique lens reduces your telescope’s focal length and f/ ratio by 37%, turning your long focal length telescope into a fast, short focal length instrument. A f/10 focal ratio now achieves a f/6.3, while an f/11 focal ratio now achieves a f/7. For visual use, this means you get...
SharpStar
SharpStar 94EDPH Reducer (94EDPHFR/SHRD94) $414.95
The 2.5" 94EDPH f/4.4 full-frame reducer is dedicated for Sharpstar 94EDPH astrograph. At one end of the reducer, there is M74×1 thread, tapped for the connection to the 94EDPH’s reducer and at the other end the reducer, there is M48×0.75 thread for the connection of most stock cameras. The back focus is 55mm after the attachment of a camera. Description The reducer is designed with a four-element air-spaced lens structure, supporting full-frame imaging and the image circle reaches 50mm, effectively controlling unwanted vignette. The practical focal ratio of the Sharpstar 94EDPH when used with this reducer is f/4.4, and the...
SharpStar
Sharpstar 61Edph Reducer (61EDPHR45/SHRD61) $254.95
The 2.3" 61EDPH f/4.5 full-frame reducer is dedicated for Sharpstar 61EDPH and 61EDPH II astrographs. At one end of the reducer, there is M63×1 thread, tapped for the connection to the 61EDPH’s reducer and at the other end the reducer, there is M48×0.75 thread for the connection of most stock cameras. The back focus is 55mm after the attachment of a camera.The maximum back focus can be extended up to 99mm if users add extra spacers(not included). Description The reducer is designed with a three-element air-spaced lens structure, supporting full-frame imaging, effectively controlling unwanted vignette. The practical focal ratio of...
Celestron
Celestron Reducer Lens .7x for EdgeHD 925 ... $580.00
Celestron’s EdgeHD reducers feature a custom 4-element optical design engineered to maintain the flat-field performance of our award-winning EdgeHD optical system. Unlike generic reducers, our premium reducers provide substantial back-focus to accommodate an assortment of imaging accessories. Description EdgeHD reducers offer high-index optical elements, including extra-low dispersion, exotic Lanthanum elements, which provide high contrast viewing while minimizing chromatic aberration. All air-to-glass lens surfaces feature multiple layers of coating for maximum light transmission and colour correction and contain blacken edges to minimize internal reflection and maximize image contrast. Large diameter lens elements, up to 60mm clear aperture, ensure that the optimized...
SharpStar
Askar 107PHQ Reducer (107PHQ SR/ASF107130RE) $449.95
Askar’s new-launched 3” 0.7x full-frame reducer adapts for 107PHQ & 130PHQ. It has a triplet design with one ED glass. Description The 0.7x reduction gives 107PHQ a shortened focal ratio of 4.9 and a shortened focal length of 524mm. This reducer, connected with the astrographs, can effectively shorten the exposure time and dramatically increase your field of view, bringing more convenience and possibilities for your deep-sky astrophotography.
Celestron
Celestron Reducer Lens .7x for EdgeHD 110... $1,130.00
Celestron’s EdgeHD reducers feature a custom 5 element optical design engineered to maintain the flat-field performance of our award-winning EdgeHD optical system. Unlike generic reducers, our premium reducers provide substantial back-focus to accommodate an assortment of imaging accessories. Description EdgeHD reducers offer high-index optical elements, including extra-low dispersion, exotic Lanthanum elements, which provide high contrast viewing while minimizing chromatic aberration. All air to glass lens surfaces feature multiple layers of coating for maximum light transmission and color correction and contain blacken edges to minimize internal reflection and maximize image contrast. Large diameter lens elements, up to 60mm clear aperture, ensure...
Sky Instruments
Antares Focal Reducer/Corrector 6.3 (SCTFR) $119.95
The Antares SCTFR is the standard thread-on F/6.3 4-element fully multicoated reducer/corrector used on F/10 Schmidt-Cassegrain telescopes. It is actually only a reducer, but it does increase true field at the expense of some increase in spherical aberration and some vignetting (dimming) at the edge of the field. F6.3 Focal reducer for F/10 Schmidt-Cassegrain, 43mm aperture, 4-Element, Fully Multicoated
SharpStar
SharpStar 140PH Reducer (140PH SR/RD140075) $519.00
The new 3" full-frame reducer for 140PH APO is equipped with a solid body made of quality metal. It can effectively shorten the original f/6.5 focal ratio to f/4.8, indispensable in advanced astrophotograph with 140PH APO. The image, especially the stars around the edge can be much sharper, particularly preferred by those experienced astrophotographers. Description The reducer features a three-element air-spaced lens structure, a rotator and M48×0.75 thread. The back focus is standard 55mm and it can be morphed up to 105mm after threading off the rotator, providing more options for customers. At the front of the reducer there is...
Special Order
Sky-Watcher
Sky-Watcher Esprit 150ED Reducer/Flattener... $680.00
Specifications Overview 36mm fully illuminated field, compatible with both APS-C and full frame sensors 90mm back-focus (55mm when back focus spacer and M48 ring installed) Drops f/ratio from native f/7 (1050mm) to f/5.4 (810mm) Reduces exposure time by 68% compared to native f/7 2.54 x 1.7-degree field of view when used with a full frame camera 1.66 x 1.11-degree field of view when used with APS-C crop sensor Includes reducer, metal thread-on caps, back focus spacer and M48 thread adapter Built-in 2" filter cell for mounting filters into the light path

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