Purchased a very old and odd Kilfitt lens a few days ago. For anyone who has never heard of Kilfitt, they were a very good lens manufacturer based in Italy and later Lichtenstein for many years. They've made some excellent lenses, including the venerable 40mm f2.8 macro. I believe that lens is at least 40-50 years old and the later D versions could reach 1:1 magnification.
The one I've found is the Heinz Kilfitt Munchen Kilar 90mm f3.5. There isn't much info on that lens except from a Japanese blog, where someone used it on a Sony A900. It's a 39mm screwmount (m39) and requires an extension tube as well as an m39-m42 adapter for use on a Pentax camera. Check photos below to see how long the extension tube is. The aperture control is completely preset, much like a lens from a 16mm film camera.
I don't have any extension tubes on hand or an m39-m42 adapter so I used business cards and tape. I had suspected that it was a Leica screwmount but that would mean it would have had a shorter registration distance, not a significantly longer one. I believe there was an extension tube that was sold with this lens, but I could be totally wrong. I hope someone here can enlighten me on this curiosity.
Jesus Christ, that's a lot of aperture blades!
Awesome extension tube:
Wide open at f3.6 with make-shift extension tube:
Great rendering.
These were taken without my makeshift extension tubes. So I just positioned the lens in front of the camera by an inch or two. A lot of light got in and images are quite soft as a result.
Giant flare on the upper right corner from light leaking in without an extension tube. The lens was also tilted a bit.
This is as sharp as I could get the image to be without an extension tube, there is a lot of light leaking in.
Flare again from light leaks. Sharpness seems good and CA control is terrific for a lens that's twice as old as I.
Overall, a very interesting lens. It can't compete in the sharpness department even with extension tubes but it has other things going for it. I might create a hard rubber tubing for it as an extension tube, that would also act as a shift/tilt device.
I should really measure the distance of the extension tube in order to buy some...
Last edited by hangu; 06-11-2010 at 03:25 PM.