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The Apertura 75Q 0.75× Reducer is designed specifically for the Apertura 75Q 75mm refractor, transforming its native f/5.4 focal ratio into a faster f/4, reducing the focal length from 405mm to approximately 303.7mm. This upgrade significantly enhances light-gathering capability, reducing exposure times and improving the signal-to-noise ratio, key advantages for deep-sky astrophotography. The reducer threads directly onto the rear of the 75Q, replacing the standard adapter, and maintains a 55mm back-focus. It also accepts standard 2" filters through built-in threads, offering added convenience. Optically, it delivers sharp stars across the entire field of APS-C sensors, with minimal distortion or vignetting. Its construction ensures a flat field and consistent performance from edge to edge.
This reducer effectively turns the 75Q into a wide-field imaging system, ideal for capturing large nebulae, star fields, and galaxy groupings. Users benefit from a faster system without sacrificing image quality, making it especially valuable under light-polluted skies or during time-limited sessions. With a simple installation and compact design, it’s a seamless upgrade for the 75Q. The Apertura 75Q 0.75× Reducer is a smart, high-performance addition for astrophotographers looking to maximize their setup’s potential.
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Celestron Reducer Lens .7x EdgeHD 1100
The Celestron 0.7x Reducer Lens for EdgeHD 1100 is a high-quality optical accessory that will upgrade the performance of your 11" EdgeHD telescope, particularly for astrophotography. By shortening the focal length from 2800mm to 1960mm, this reducer lowers your system from f/10 to faster f/7, enabling you to take deep-sky images much quicker while opening your field of view wider. Designed exclusively for the EdgeHD optical design, the 0.7x reducer maintains the telescope's native flat-field correction for large imaging sensors, making it suitable for full-frame and APS-C cameras. Its high-quality, fully multi-coated optics produce edge-to-edge sharp, high-contrast images with little distortion or chromatic aberration.
Celestron f/6.3 Focal Reducer Corrector for SCT Telescopes
Thе bеst Cеlеstron focal rеducеr dеpеnds on thе typе of tеlеscopе you usе and your obsеrving or imaging goals. For standard Schmidt-Cassеgrain Tеlеscopеs (SCTs), thе Cеlеstron f/6.3 Rеducеr/Corrеctor is thе top choicе. It еffеctivеly rеducеs thе focal ratio from f/10 to f/6.3, allowing for widеr fiеlds of viеw and significantly shortеr еxposurе timеs. Whilе it doеs offеr somе fiеld corrеction, it’s not a truе fiеld flattеnеr and may not pеrform optimally with largеr camеra sеnsors.
Celestron .7x Focal Reducer for 8" EdgeHD Telescopes
Thе Cеlеstron 0.7× Focal Rеducеr for 8″ EdgеHD Tеlеscopеs is a high-pеrformancе accеssory dеsignеd to еxpand your fiеld of viеw and еnhancе imaging spееd. Optimizеd for EdgеHD optics, it dеlivеrs sharp, coma-frее stars across full-framе sеnsors whilе dеcrеasing thе еffеctivе focal ratio for fastеr еxposurе timеs. Prеcision-еnginееrеd to maintain optical pеrformancе, this rеducеr is idеal for astrophotographеrs capturing widе dееp-sky objеcts with consistеnt еdgе-to-еdgе clarity.
Celestron 0.7X Reducer Lens for 1400 EdgeHD
Celestron 0.7x Reducer Lens for EdgeHD 1400 is a dedicated optical accessory meant to optimize the performance of the 14-inch EdgeHD telescope. By shortening the focal length from f/11 to f/7.7, this focal reducer renders the telescope one full f-stop faster, thus reducing exposure times for astrophotography by half. This decrease in exposure time is beneficial when shooting faint deep-sky objects, enabling more effective imaging sessions. This reducer lens is a great accessory for astrophotographers wanting to upgrade their imaging capabilities using the EdgeHD 1400 telescope.
Celestron 0.7x Focal Reducer
Celestron 0.7x Focal Reducer is a premium optical accessory made especially for the 8-inch EdgeHD telescopes. The 4-element lens system reduces the native focal ratio of the telescope from f/10 to f/7, essentially making your system one f-stop faster. This reduction in focal ratio brings about shorter exposure times, which makes it easier for astrophotographers to shoot faint deep-sky objects. This focal reducer is exclusively for the 8" EdgeHD telescopes and is compatible with the EdgeHD 800 T-adapter. It has been optimized for APS-C-sized sensors, such as most DSLR and Nightscape CCD cameras.
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Celestron focal reducers are some of the crucial tools amateur and professional astronomers use when they want to improve their telescopes' performance, especially in astrophotography. These small-sized optical accessories are meant to shorten the effective focal length of a telescope, ultimately lowering the focal ratio. The end result is an increased field of view and considerably decreased exposure times. Essentially, a focal reducer enables you to observe more sky in shorter time, which makes it an indispensable tool for anyone involved in deep-sky imaging or observational convenience.
Perhaps the most widely used model in the Celestron range is the f/6.3 Focal Reducer/Corrector. It can be used with all Celestron Schmidt-Cassegrain Telescopes (SCTs) between 5-inch and 14-inch apertures. It shortens the focal ratio from f/10 to f/6.3, essentially halving exposure times. Along with accelerating imaging, it also remedies field curvature. It enhances image acuteness, especially at the edges of the frame. A consideration to be considered by astrophotographers employing DSLR or CCD cameras. It is versatile enough to be used for imaging and visual observing.
For owners of Celestron's high-end EdgeHD telescopes, the firm provides a specific series of f/7 focal reducers designed for each model of EdgeHD, such as the 800, 925, 1100, and 1400. These reducers are engineered to preserve the telescope's flat-field design while providing a quicker f-ratio. The optics are multi-coated throughout to provide high contrast and low chromatic aberration, and the reducer mounts directly on the rear cell of the telescope for convenient mounting. It is therefore particularly useful for capturing wide celestial objects or building multi-panel mosaics without compromising image quality.
Having a Celestron focal reducer provides many benefits. For astrophotographers, having the capability to shoot at a faster focal ratio is beneficial because you can accumulate sufficient light in a shorter time, ideal for areas where there are few clear nights or when using portable, battery-supported mounts. This also aids in image framing, particularly when capturing large objects that do not fit into the tight field of a long focal length SCT. Notably, Celestron reducers double as correctors, which serve to enhance edge-to-edge image sharpness, especially on larger sensor formats.
To get the best performance from a focal reducer, it’s important to maintain the correct back focus distance between the reducer and your camera sensor. For most Celestron setups, this distance is around 105mm. Users should also be cautious about stacking filters or accessories, as each added component can affect optical spacing. Additionally, because reducers expand the field of view, any imperfections in collimation become more noticeable.
Celestron focal reducers are a valuable and reliable upgrade for astrophotographers and visual observers using SCT (Schmidt-Cassegrain Telescope) systems. These reducers effectively shorten the telescope’s focal length. Typically, it is from f/10 to around f/6.3, offering a wider field of view and brighter images with shorter exposure times. When used correctly, their optical quality is solid, delivering well-corrected views with minimal distortion or chromatic aberration. They’re handy for deep-sky imaging, allowing users to capture larger targets like galaxies and nebulae more efficiently. Build quality is robust, and installation is simple with standard SCT threads. While edge sharpness may drop slightly on full-frame sensors, results on APS-C and smaller formats are generally very good. The Celestron 0.63x reducer, in particular, remains a go-to choice for many SCT users due to its performance-to-price balance. Overall, Celestron focal reducers offer a practical, cost-effective way to enhance imaging and viewing flexibility without complicating the optical train.