Thread: What am I doing wrong?
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  #6  
Old 26-11-2020, 08:11 PM
pberrett
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pberrett is offline 		 
Join Date: Aug 2012
Location: Melbourne
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Thanks

My telescope has an aperture of 130mm and focal length of 900mm so I presume the calculation is 500/900 = 0.55 seconds. Have I calculated this correctly?

Thanks Peter
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