The large and medium format Topcor/Topcon lenses are excellent performers. Right up there with the best Japanese lenses. I suspect the 35mm Topcor lenses are also great, but have never used them. Topcon made 35mm SLRs before both Nikon and Cannon.
I'd use it if I had it. There is a Topcon web site out there somewhere listing the lenses etc.
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