Thread: Can someone astrosmart please work this out?
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Old 10-04-2014, 05:09 PM
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mental4astro (Alexander)
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mental4astro is offline 		 
Join Date: Jun 2008
Location: sydney, australia
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Divide the AFOV by the respective magnification. That will give you the true FOV .

By the values you give, the difference is small, 0.926º for the 14mm & 0.976º for the 18mm.
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