Features: Celestron Reducer Lens 0.7x for EdgeHD 1400 Schmidt Optical Tube Assembly  Increase the field of view by 43%, which is better for capturing wide field images of larger galaxies and nebulae.  Allows use of existing EdgeHD T-adapters and other Celestron imaging accessories.  5-element optical layout designed specifically for the EdgeHD 14" Optical Tube Assembly to maintain its flat-field performance.  The EdgeHD 0.7x lens provides generous back focus to accommodate additional accessories and a wide variety of cameras.  Anti-reflective multicoated lenses.  All lens elements have blackened edges to minimize internal reflection and maximize contrast.  All air-to-glass surfaces have multiple layers of coating for maximum light transmission and colour correction.  The EdgeHD Reducer Lens uses rare earth Lanthanum glass elements for clear, high contrast viewing while minimizing chromatic aberration. Specification - Celestron Reducer Lens 0.7x for EdgeHD 1400 Schmidt Optical Tube Assembly  Design 5-element  Compression Factor 0.7x  Optical Coatings Fully multi-coated  Back Focus Optimal: 146 mm  Weight 1.47kg