I wanted to love this lens. The plan was to replace my Voigtlander 35mm f/2.5 Color-Skopar. Unfortunately the block I received has back tricks. I compared A/B with my Voigtlander 35mm and my 50mm. Nobody has this problem. So that's not my range finder. It's not clear to me if this was a one off issue or something related to this production. Until more reviews come out I've decided to just stick with my trusty Color-Skopar.
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