Hello, I went through the archives and several other webpages searching for information on three (?) different models of famous Vivitar Series 1 70-210. I haven't found a complete description of them anywhere - I am particularly interested in the producing factory, minimal f-stop (3.5 / 2.8), size of filter thread (62/67mm) and Macro function (through all range or at a certain focal length?) and general performance rating for each of them... Could anyone give me an answer or just a hint where to look for such information? Thanks in advance!
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