Hey All, Not sure if this is exactly the right place, but couldnt figure out another place to put it. I picked up a 58mm Minolta MC 1.4 for really cheap at a local thrift store, because the aperture was frozen open. Opened it up, got it all cleaned and snappy, and is 90%+ back together. The only issue I have right now is that there is a small ring that has the bayonet, and a tab to keep the aperture wide open, until the camera "fires". There are a few spacers and ball bearings that keep it turning smoothly, and they are not going back in exactly correct. So I am trying to figure out if I actually need that particular ring in there. There is the mounting ring seperate from that, which is secured with screw. My guess is that using an adapter would negate the bayonet keeping it open anyway, correct? By mounting it on an old Minolta 35mm, it just seems to make the viewfinder darker when composing the picture, as compared to a working lens with a bayonet. Only other issue I could think of is it has a small opening to allow dust to get into where the springs are located that control the aperture. The rear element screws into the back of the heliocoid?, so there shouldn't be any issue of dust getting on the blades of the aperture. Opinions? Thoughts? Random comments? Just getting into it, so making sure what I understand about the mechanics of MF lenses are correct.