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Experiment: Do older wide aperture lenses have issues with CMOS cameras?

To follow up on my article here about the possibility that camera manufacturers are upping ISO behind the scenes with older wide aperture lenses, I attempted to do a test with two of my lenses and the two camera bodies I have. The test components: – K-7 camera body (CMOS type imaging sensor) – K10D […]

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Article Equipment DIY

Camera Factory Variation (Auto-Focus alignment)

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, […]

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Reversing Ring (Macro Photography)

Thanks to David at my local camera shop Camera Craft Inc. for giving me a M42 reversing ring + M42 to K-mount Adapter. This is a fun little gadget that’s a nice cheap way to get into extreme macro photography. This is what the reversing adapter looks like: The black ring is the one that […]