Description
The Celestron EdgeHD .7x Focal Reducer Lens has 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.
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.
Incorporating computer assisted CNC machined aluminum housing, for precise spacing and alignment of optical elements, and threaded metal covers on the lens assembly to protect your investment from dust and scratches, our reducers offer you an outstanding mechanical design. With the Fastar option on all EdgeHD optical systems, coupled with the .7x reducer, your telescope becomes the most complete imaging system available in its price range today.
Features
The edgehd .7x focal reducer lens makes your edgehd 800 one full f-stop faster than f/10, doubling the equivalent exposure at f/10
4-element lens design
Maintains similar flat-field performance as native edgehd optical design
Increases field of view by 43% (double by area) to better capture wide field images
Optimized for aps-c sized sensors, including most dslr cameras and nightscape ccd cameras
Provides generous 105mm back focus to accomodate additional accessories and a wide variety of cameras
Compatible with edgehd 800 t-adapter
Specifications
Optical Coatings Fully Multi-Coated
Weight 0.8 lbs (0.36 kg)
Compression Factor .7x
Lens Elements 4-Element
Optimal Back Focus 105mm (4.13")
