Carl Zeiss Jena Sonnar 135mm f/3.5 test on full-frame

This is a nice lens for 35mm cameras, with a built-in hood. The version I tested was M42 (Pentax screw) mount.

Briefly:

  • Vignetting is only an issue wide open, improves a lot at f/5.6 and is basically gone by f/8
  • The center of the frame is already sharp at f/3.5, and only improves a little bit at f/5
  • The corners are pretty good at f/5.6 and sharpest at f/8

Please read the full review with sample images here.

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