Tag Archives: wide aperture

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

cn3_k10d_histogram_test2

Here is a link to my first article as well as the reason I’m doing the test. Thanks to a good tip from a user at a forum I frequent, I decided to test with just the FA 50mm f1.4 lens on both bodies. The difference this time is that I covered the data connections between the cameras and lens for the second sample set. Reason for the testing: Find … Continue reading

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

k10d_55mm_histogram

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 camera body (CCD type imaging sensor) – Chinon 55mm f1.7 (M42 Screwmount + K-adapter designed … Continue reading

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