0.8x Reducer Flattener for GT71 /GT81 /Z103Description This William Optics 2" Field Flattener and Reducer has been designed to optimize the flat field imaging performance of William Optics GT71, GT81, Z81 & Z103 refactors. The APO triplet optics of the Field Flattener and Reducer are made with Ohara glass and fully multi coated to provide good illumination and a beautifully flat field across 97% of full frame sensors. The reducing factor is 0. 8X. Designed with M63 threads on the telescope
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