maitani
Well-known
the OM 28mm 3.5 is very good.
People love Olympus OM glass, and for good reason, but the one OM lens that truly and consistently wows me, even compared to my Zeiss and Leica glass, is the humble 50/3.5 macro. Very small size, flare free, distortion free, SHARP, great local and overall contrast, with a smooth transition from in focus to out of focus areas. Plus it does 1:2 macro without extension tubes, making it an extremely versatile walkaround lens. Only drawback is that it is f3.5.
The best thing about it is that it is readily available for <$100, which is not really true for a lot of the best OM Zuikos (e.g. the f2 lenses).
Another vote for the Zuiko 50/3,5 macro. I have used mine for professional reproduction work with eos 5d mkII.
Besides the difference in resolution between the cameras the quality is only slightly better with Zeiss Planar HC 80mm and Hasselblad H3D.
I have not tried the off-brand lenses but I certainly agree with your Nikon picks. I have each of the ones mentioned and have been impressed by their performance. In particular I would say the Micro-Nikkor 105 f4 is a hidden gem. Most people overlook it in favour of the f2.8 variant but its a cracker at both micro distances and infinity. In general I have found that pretty well any lens by a major manufacturer in a "standard" focal length (35mm, 50mm, 135mm in particular) and having something other than a super fast speed tends to be good to excellent lens. The other lenses of this sort that I have been impressed by are the old Pentax M42 Screw Mount lenses. It is hard to find one that is anything other than excellent. With the exception of one or two rarities all are inexpensive.
One final thought. A lens I was frankly surprised by when I first tried it, was the Leica Elmar 50mm f3.5 (a cheap and once common lens in Leica's lineup). Then I recalled its design is based on the Tessar design and that as with Zeiss lenses of this type (e.g the color skopar lenses it made for various cameras) this simple basic design (with only 4 elements and developed because in those early days when there were no lens coatings so a simple design was essential) works well within its modest design parameters. A surprisingly good and in Leicas terms cheap lens.
I'll vote x2 for this Zuiko 50/3.5 macro all day. The other Zuiko I'll never sell is the original salesman sample I got of the Zuiko 35-70 f3.6. This is the only zoom lens I own, considering the amount of working cameras I have.
Dralowid--That Yashica lens was an LTM type identified as YASHINON 1:1.8 f=5cm. As I recall, it and an f2.8 version were the only LTM lenses Yashica made.