08-31-2015, 10:37 PM #6 I'm not suggesting you go out and buy anything, but if you happen to have an interchangeable mirrorless that will probably buy you an inch of backfocus. My Nikon eats 46.5mm of BF but my Sony a6000 a much smaller 17mm (IIRC) Richard Mounts: GM1000HPS,CEM60,ZEQ25; Scopes: NP127is,ES102ED,ZS 71,RASA, EdgeHD1100, LS60Tha/1200B/PT; Focusers: MoonLite 2", 2.5" SCT,2x FeatherTouchMicro; Modifier/EPs: TV 7,27,35mm, ES 18mm; TV 2,4x; HT 2" flattener, TRF-2008 0.8x R F, EHD11 0.7x Cameras.
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