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Old 16-11-2014, 05:34 PM
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cometcatcher (Kevin)
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Join Date: Jan 2005
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The Sun + AR2192 in white light
From yesterday and today.

How can I increase my focal length just a little to fit the Sun more snug in the frame with this ED100? At F9 the E100 is still only 900mm FL. I want to fill the frame which I think would be around 1300 - 1400mm for a Pentax APS-C sensor. A 2x barlow is waay too much. Eyepiece projection?
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