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    Re: DSLR Camera CN with 28 mm Lens
    From: Antoine Couëtte
    Date: 2016 Jul 24, 05:18 -0700

    Hello Greg,

    Fantastic Job ! Well done ! The Frog is impressed !

    Kermit

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    Re:

    From: Greg Rudzinski

    Date: 2016 Jul 19, 13:44 -0700

    Attached is a graph for determine the minutes of arc per pixel for pixel counts from 700 to 3700 on the 28mm Pentax prime wide angle as used on a Canon Rebel 1.5 frame DSLR body. The 22  sextant horizontal angle images used to creat the graph took about 40 minutes to capture. Image processing and graph construction took about 1.5 hours. Checking for repeatability shows a spread between 0 and 3.5' toward so there is a toward error bias in the graph. The spread is about right for the expected +/- 1.4' precision of the 28mm wide angle. So far I'm satisfied with the results and the 41° field of view. 

    Greg Rudzinski

       
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