What maybe happening is that these shows will eventually die, when all that's left are the large vendors. I have been making conscious efforts to skip the commercial vendors' tables, since they seldom have any good deals. If the shows ever end, that will be a very sad day.
I did spent more than I should have at today's show, as it usually happens. One of the items I bought was the Voigtlander Prominent with an Ultron 50mm f2 lens. I have been looking for this lens for a very long time, and I bought one today at a reasonable price, but the lens has separations in the rear elements. From experience, this hardly causes any issues with image quality, and I hope I am right about this one.
Voigtlander Prominent with Ultron 50mm f2
One good deal today was the RE Topcor 135mm f3.5 for $5. Every time I go to a camera show, I keep any eye open for the Topcor lenses, since Steve mentioned them in the comment section of this post. They are not very common here in Toronto as I don't see them often. I am happy to find another one for the collection for a low price. But his one has a modified EXA mount which won't fit the Exaktar adapters.
RE Topcor 135mm f3.5.
Found another Vivitar 2X Macro Teleconverter for $15. I have 6 or 7 of them now and I usually pick them up if they are under $20. I use them as focus helicoids for those lenses that don't have focus mechanism. In the What Was I Thinking Department, I bought a C-mount 75mm f1.4 lens, hoping it would at least be usable in APS-C sensor, but the image circle is rather small. Works well on the E-M5 though. I haven't used C-Mount lenses for a while, and I really don't understand why I bought it. Finally, a couple of broken rangefinder cameras that I will remove the lenses from. A Nikkorex Auto35 with a Nikkor-H 48mm f2, and a Minolta AL with 45mm f2 lens. Hopefully I will be able to make the lenses work.
No-Name (but 90% certain it's a Cosmicar) 75mm f1.4.