Time for a new optical project!
I have today acquired an interesting old lens... A Sigma 28mm f/2.8 - manual everything, which is quite nice really - and in Minolta (MD) mount.
The lens cost me $19. I probably won't be buying a Minolta (/Konica / Sony) camera any time soon, so for a bit of fun, and to (hopefully) get a nice manual prime, I am going to convert it to Canon EF mount.
Because of differences between mount and sensor/film - I can't just use a straight adaptor (without introducing a crop factor, and not being able to focus to infinity anyway), and I don't like the idea of adaptors with optics in them.
So, my plan of attack...
*Purchase an EOS to M42 adaptor (this is on the way already). M42 is a screw thread style mount - so you can think of the M42-EF adaptors as more or less an EF mount.
*Dis-assemble the MD mount currently on the lens. (I have already done this... it seemed fairly straight forward - the aperture lever came off with the mount which is nice)
*Remove any tabs which might be in the way. (or better, cut the adaptor to suit)
*Drill holes in EF-M42 adaptor to suit existing screws used on MD mount
*Re-assemble with EF-M42 in place.
A guy on flickr has already done a similar process - http://www.flickr.com/photos/asbalyan/sets/72157603494868864/
Another guide is here -> http://www.pbase.com/kkawakami/mctoef_mount_conversion
I'll be following the same sort of guidelines - but hopefully will do a neater job!
I really like the idea of picking up old, good quality glass and being able to use it on my modern body.
Has anyone attempted anything like this? Pics/Progress to come.