ISCO 55mm F2 projection lens to M42 conversion
Description
This is a simple M42 connector + counter screw focus stopper ring allowing adaptation to any M42 camera adapter + Yehon round aperture adapter (EF to MFT in that case) the Isco lens dive 9 mm into the M42 mount (7.54mm into the EF) it's snug fit into the connector, though there's a pre-taped 1.8mm hole on side of the tube to add a tiny M2 screw as stopper Isco 55mm should focus infinity to about 50cm close-up !! BEWARE !! the tube can unscrew off the M42/EF adapter! Due to adapters / lens design... I couldn't add extra stopping lip to end of tube to prevent falling out without reducing drastically close focus ability. Though in case of use as taking lens in pairing with anamorphic (Ultrastar), such a securing feature can be added to the design ;)
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