> Could you please be so kind an tell me something about the following lenses: > > 28/3.5 PC - is it good to use in general conditions (traveling?) - what > about filters, vignetting, image quality, .... Hi sImOn, I had some experience with the early 35/2.8 PC lens. Generally, I would say PC lenses not good for general conditions. There is no automatic diaphram and metering is stop down. Also, if you are shifting the lens, you must meter before you shift (unless you have an F3), generally it is easier to do this manual mode. It is much easier to do all this if the camera is supported on a tripod. It is a specialised lens which requires patience and attention to get good results. Of course, if you do a lot of architectural photography, you may be willing to put up with this. Personally I prefer convenience and decided I can live with converting lines (I think removing converging lines completely often looks unnatural). Because of the wider image circle of PC lenses, they have less vignetting than normal lenses when unshifted or with small shifts. I was quite happy with the optical quality of the 35/2.8 PC I tried. Quite sharp and distortion was very low - unlike my 35/2. > 20/3.5 with the 52mm thread - what about vignetting, usability.... quality > compared to later versions and the 20/3.5 UD with 72mm thread (would it be > an upgrade besides the cheaper and more common filters?) I have used the compact 20/3.5 quite often and have been very pleased with the results. It is contrasty and very sharp at apertures smaller than f5.6. Although I don't have a high-powered loupe, the images look as sharp as those produced by the current 20/2.8. There is some loss in resolution in the corners, especially at wide apertures and at close range. Flare has never been a problem even without a hood, the small front element does not catch much stray light. Although I have the recommended HK-6 hood, I use an HN-1 hood (for the 24/2.8) which is much smaller and more convenient to use - the lens cap can fitted with the hood still attached. The HN-1 does not cause vignetting if mounted directly on the lens (don't use it over a filter). The compact 52mm filter size is very handy. I use a normal hoya polariser (not wide-angle or slim-line) and it barely causes vignetting in the corners - hidden by slide mounts. If you want a compact lens wider than 24mm, this is a great lens to have. Check out my web page for some images taken with my 20mm lens. Roland. == Roland Vink ============================ [EMAIL PROTECTED] http://home.ait.ac.nz/staff/rvink/
