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    Re: Smart Phone CN
    From: Greg Rudzinski
    Date: 2020 Mar 3, 07:47 -0800

    Attached is a first calibration effort for the Samsung 5 mp camera in pro mode. Pro mode allows for fixing focus at infinity by holding a finger down over a distant area of sky.  The wide angle is extensive and offers 50° of practical use. Now it is off  to the beach for practical trials. Anticipating 4 moa precision for high altitudes and 2 moa precision for low altitudes. If repeatability is confirmed then the Samsung gets added to the onboard CN tool kit. Filtering the Sun is a bit fiddly. To do this I hold the cell phone upside down with the camera lens low then hold a piece of solar film over the Sun. Image is snapped with a press of the thumb.

    Greg Rudzinski

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