Reviews and Problems with Pentax 15 mm f/4.0 ED AL Limited
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28 November 2010
Excerpt: If you rate a lens by construction, then it rates high. If you rate it by the picture it takes, then it is rated at a 6. Not sharp at all unless stopped down to f8 at least. At f4, everything is fuzzy. No amount of lens adjustment in the K5 changed this fact. I sent my copy back, very disappointed with the quality of picture with this lens.
Pros: Metal construction, small size
Cons: Not sharp at all wide open, must stop way down