|Posted: Thu Jun 14, 2018 7:20 am Post subject:
|I took mine out and set it into a 35-90mm Helicoid (65mm), and mounted on my Panasonic GH4 (mft).
The lens dives into the helicoid and the lens mounting ring from end of ring(= front of helicoid) to end
of lens is 22mm for infinity. This means end of lens to camera front plate is ca. 27mm
Indeed to mount it on a DSLR is needs to be quite close, as for mft the register length is 19.25mm
(Sony-E is 18mm), whereas Nikon-F is 46.5mm (for Nikon the lens end has to nearly touch the camera front).
Had overlooked that it was intended for Canon-EF, as Canon EF register is 44.0mm, so there is
27mm + 19.25mm = 46.25mm , then 46.25 - 44.0mm = 2.25mm between lens end and Canon EF mount.
Doable on a custom made basis (like yours Pierre) BUT NOT WITH A STANDARD 65mm HELICOID!!
Klaus - Moderator
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Carl Zeiss Jena UV-Objektiv f4/60mm
COASTAL OPTICS f4/105mm UV-Micro-Apo
Pentax Ultra-Achromatic Takumar f4.5/85mm
Pentax Ultra-Achromatic Takumar f5.6/300mm
Rodenstock UV-Rodagon f5.6/60mm + 105mm + 150mm