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Askar 0.75x Full Frame Reducer for Askar 65PHQ
The Askar full-frame reducer for 65PHQ has a quadruplet design and the 0.75× reduction gives Askar 65PHQ a shortened focal ratio of f/4.8 and a shortened focal length of 312mm. The backfocus is 55mm. It comes with two thread adapters of M54, M48 with a built-in M48×0.75 2" filter thread, so it is convenient for connection.