Jonathan-Mac wrote:
Looks like it lacks more in contrast than in sharpness.

Jonathan-Mac wrote:
Looks like a job well done. 8 quid for a Dremel copy? Wish I could find one for that price.

PeterKR wrote:
I had a similar problem with an old P/KA mount lens which also had the extended flange.

If you are careful you do NOT need to dismatle the lens to fix it !

I made a circular seal from thick card to stop filings getting into the optics.

Just cut a small circle (which you estimate to be a little bigger than the rear element) from paper then try it for size.
Once you have the right size cut a very slightly bigger circle from thick card and 'roll' the edges to soften them. You will then find you can push the seal over the rear element to make an effectice dust seal.

I then cut the flange to match a Pentax DAL lens. I used a thin needle file like a small saw, first downwards then along the side to weaken it and it then snapped off easily. Then simply smooth off the edges with the needle file.

Carefully remove ALL of the swarf and THEN remove the card seal (pick it out with a small spike, pin or needle)- job done !

Good luck

Peter

Jonathan-Mac wrote:
The lens has an extended flange at the back. You can see it in the third picture. I had a Vivitar with the same problem. While it mounts ok on an older film camera (pre-AF) it will damage the inside of the mount on a DSLR because the extended flange hits what are now the SDM contacts (formerly power-zoom contacts). Below is a picture of my lens with the extended portion removed.

[IMG]http://i6.photobucket.com/albums/y232/jonnymacd/Various%202/IMGP6941.jpg[/IMG]

You need to remove the black inner part of the metal mount to avoid damaging the optics, and cut the excess flange off with a hacksaw or similar. Alternatively, you can remove this part and leave it off, but it leaves the optics open to dust and the aperture lever unprotected from damage from impacts.

Good luck