I was planning on writing an article about my three wide angle lenses (14mm f2.8, 10-17mm fisheye, and Zenitar 16mm fisheye). I started taking a few sample photos with each and noticed something strange. The images at wide aperture with the 14mm f2.8 looked really poor. Initially I was thinking that user error was involved, so I went through various processes about… 3 or 4 times with the same result. Eventually I tried the 14mm f2.8 on my other camera body and received an extremely sharp image at the same aperture setting. It’s just a fact of life that there are tolerances and levels of variation when electronic and mechanical devices are aligned and configured. What I know now is that my K10D has an issue with something called front/back focusing, so far I only know it happens on the 14mm f2.8. The mechanical device inside is slightly miss-aligned so when I take a large aperture shot, the intended area of discernible focus isn’t where I expected it to be producing a seemingly un-sharp
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