I ordered an adapter that allows me to use lenses for my old German Exakta cameras on my Canon EOS 30D. Below? The first five shots I took with the new adapter. I stepped out on the front porch and took a few shots - just to see.
The lens I used for the first test is a Carl Zeiss, Jena, Biotar 58mm, F2. The camera was set on Manual, the ISO was set at 125, the lens was preset at f8, the Infinity mark on the lens was set over the f8 mark - meaning, according to the focusing scale, everything from 4.5 meters to infinity should be in focus - and the shutter speed for the first shot was set at 125th of a second. The focusing ring wasn't touched, at all, during the test.
(camera shake, too?)
(anxious to see this and two above from a tripod)
Although the Biotar is a serviceable lens, it is not the sharpest knife in the drawer. The Tessar, by CZJ, and the Lithagon by Enna Werk, Munchen, are, in my estimation, much better lenses. The handicap for this test is that the shots were handheld. The second third and fourth shots are victims of that handheldness. I am going to re-shoot this lens, along with others, this weekend. I will use a tripod for the subsequent test - just so that I can get an honest look through the lens and also test for Infinity focus. The one big problem with using lenses from one camera system on another camera system (usually with an adapter of some sort) is that it is oftentimes impossible to get good focus at Infinity.
Anther factor to consider is that this 58mm lens, on a Canon 30D or any APS-C sized sensor camera, is equivalent to a 92.8mm lens on a 35mm film camera. So handheld at slower ISO speeds might not be a good answer for this lens. Again - this test needs to be repeated from a tripod.
It's going to be fun learning how to shoot these lenses with a digital camera.