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Answers to all questions
Q1. No noise reduction function on. Shouldn't need it. These red marks are consistent in one location every exposure, not random like noise. have done the same imaging with a canon 500d (no in camera noise reduction and perfect result).
Q2. Yes have done a test with dark frames as well. Same result.
Q3. Have tested conversion with 3 software programs (a) eos software, image browser that comes with the camera (b) Adobe DNG Converter and (c) Adobe Lightroom latest version
Regards
Carl
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