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    Re: 35mm Super Takumar Lens for CN on DSLR
    From: Norm Goldblatt
    Date: 2015 Aug 9, 21:50 -0700

    I'd love to know how you calibrate.  Star field? Calibration target? If target, I wonder if calibration would be reliable at finite distance. Obviously, the target has to be reasonably close to be practical.   I tried using Ursa Major and found that either I made some mistakes or the iphone 5 optics produce a miserably distorted field (at least for CN). 

    Norm

       
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