CE07RLEHD925

94245

Celestron

Designed specifically for their 9.25" EdgeHD optical tube assembly (OTA), the Celestron 0.7x Focal Reducer Lens speeds its focal ratio from an f/10 to a much faster f/7.1 for drastically reduced exposure times with the same results, and wider fields of view. The reducer maintains the EdgeHD optic's flat-field performance through the use of a 4-element lens system using Lanthanum glass, with blackened edges, and anti-reflection fully multi-coated optics. The Reducer is made to attach directly to the back of the EdgeHD OTA which keeps the same back focus for cameras and accessories so there is no need for new gear. A 60mm clear aperture is optimized for larger full-frame sensors to avoid vignetting of the scene.Performance Use to reduce the OTA focal ratio from a moderate f/10 to a much faster f/7.1 that drastically reduces exposure time to capture the same brightness of an object4-element lens design specifically engineered for the 9.25" EdgeHD optical tube to maintain performanceMaintains the same back focus as the standard f/10 OTA to allow the use of other EdgeHD adapters and accessoriesIncreases field of view to see more of the sky at any magnificationLanthanum glass elements for clear, high contrast viewing, while minimizing chromatic aberrationAnti-reflection fully multi-coated optics maximize light transmission for improved color, clarity, and contrastBlackened lens edges minimize internal reflection and maximize contrastUse and Construction Details Attaches directly onto the 3.25" threads of the EdgeHD optical tube to reduce vignetting and allows for use with larger (full frame) sensors and Off-Axis Guiders60mm clear aperture lens optimized for a 42mm image circle for use with large CCD sensorsMachined aluminum housing with powder-coated finish makes it lightweight and durableThreaded metal covers for both ends of the lens assembly protects against dust and scratches