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    Re: Digital Image CN Exercise #2
    From: Greg Rudzinski
    Date: 2010 Apr 8, 09:31 -0700

    Marcel,

    I see now that the north point of Kinali Island was to be use for a bearing to get the true photographer location. Heybeli seemed to be a better fit. To do better with the pixels I would need the original photo unedited or adjusted. Even so both the horizon and the Sun seemed over exposed which would cause me to measure a smaller angle and increasing my intercept away from the assumed position. I did an upper limb observation and got an intercept of 3 NM away which is closer but still I would have selected Heybeli for my bearing.

    When taking these pictures try dimming the Sun with filters held over the upper half of the field of view and then adjust exposure for a dim yet still visible horizon. I find that this can be done most easily with a circular polarizer attached to the lens and a second circular polarizer out of its frame held over the upper half of the field of view then rotated with fingers until a dim sharp image of the Sun is viewed with an unfiltered sharp horizon in the lower half of the field.

    GRudzinski
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