photo sharing and upload picture albums photo forums search pictures popular photos photography help login
koji kawakami | profile | all galleries >> Minolta MC lens to Canon EF-mount conversion tree view | thumbnails | slideshow

Minolta MC lens to Canon EF-mount conversion

This page illustrates how to convert Minolta MC Rokkor-PF 58mm F1.4 lens to EF(EOS) mount.
Since there are only three MC lenses with eight screw mount and silver spacer namely
MC ROKKOR-PF 58mm F1.4 ... see photos > http://www.pbase.com/kkawakami/mc_pf_58mmf14
MC ROKKOR-PG 58mm F1.2 ... see > http://www.pbase.com/kkawakami/mc_rokkor_pg_58_12_mod
MC TELE ROKKOR-PF 135mm F2.8 (I am not going to convert any more, do not wish to destroy them)
and possibly MC ROKKOR-PF 85mm F1.7 which has silver cover for mount base but
the mount can be easily filed down for EF-mount IMO. See the last row in this page.
MC 85/1.7 is also converted, for photo see > http://www.pbase.com/kkawakami/mc_85mmf17

The resolution of some of these lenses are in here > http://www.pbase.com/kkawakami/rokkor_resolutions

EXTRA: I added CANON FD-lens converted to EF-mount, conversion is rather easy but
you have to adjust infinity focusing adding shim and be clever for new aperture linkage.
FD 50/1.2 S.S.C. was converted, see > http://www.pbase.com/kkawakami/fdef_conversion
Eight screw MC mount
Eight screw MC mount		 Mark long screw positions
Mark long screw positions		 SR mount with a spacer
SR mount with a spacer		 Disassemble mount and its spacer
Disassemble mount and its spacer		 Save the parts safely
Save the parts safely
The lens without the mount
The lens without the mount		 Don't loose a ball beaing for F-stop
Don't loose a ball beaing for F-stop		 File down aperture ring ear
File down aperture ring ear		 Mark long screw holes (not needed)
Mark long screw holes (not needed)		 Titanium coated drill heads
Titanium coated drill heads
Mark hole positions on M42-mount
Mark hole positions on M42-mount		 Make cone shape dent for screw head
Make cone shape dent for screw head		 File down alminium spacer (not finished yet)
File down alminium spacer (not finished yet)		 Temporary assembly of the new mount
Temporary assembly of the new mount		 Completed
Completed
SR-mountĦĦ
SR-mountĦĦ		 Take out silver cover
Take out silver cover		 SR-mount base and possible EF-mount base
SR-mount base and possible EF-mount base		 Measure the thickness of unwanted part
Measure the thickness of unwanted part		 Thickness is ~1.4mm
Thickness is ~1.4mm
Cogitech method 1
Cogitech method 1		 Cogitech method 2
Cogitech method 2		 Install a spring to control aperture
Install a spring to control aperture		 Detail view of new linkage
Detail view of new linkage		 Spacer filed down
Spacer filed down

post a comment
Type your message and click Add Comment
It is best to login or register first but you may post as a guest.
Enter an optional name and contact email address. Name
Name Email
help private comment
click on thumbnails for full image