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Minolta MC lens to Canon EF-mount conversion

This page illustrates how to convert Minolta MC ROKKOR-PF 58mm F1.4 lens to EF mount.
Since there are only three MC lenses of mount with eight screws and silver spacer namely
MC ROKKOR-PF 58mm F1.4 ... see > http://www.pbase.com/kkawakami/rokkor_mc_pf_58mm_f14
MC ROKKOR-PG 58mm F1.2 ... see > http://www.pbase.com/kkawakami/rokkor_mc_pg_58mm_f12_mod
and MC TELE-ROKKOR 135mm F2.8, which is not converted, but I have converted one more lens:
MC ROKKOR-PF 85mm F1.7 ... see > http://www.pbase.com/kkawakami/rokkor_mc_pf_85mm_f17
The resolutions of some of these lenses > http://www.pbase.com/kkawakami/rokkor_lens_resolutions
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

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