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A binoculars to watch sky


gak8nxpsli
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Exit pupil is simply the Objective divided by the magnification so for a 10x50

Exit pupil = Objective (50mm)/magnification(10x)   

50/10=5

Exit pupil is 5mm. Normaly an exit pupil of between 5 and 6mm is perfect for UK skies anything bigger i.e. 7mm will let in more light than the eye can capture resulting in washed out skies. Anything smaller that 4-5mm will not provide enough light to see the really dim deep space objects.

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Exit pupil is simply the Objective divided by the magnification so for a 10x50

Exit pupil = Objective (50mm)/magnification(10x)   

50/10=5

Exit pupil is 5mm. Normaly an exit pupil of between 5 and 6mm is perfect for UK skies anything bigger i.e. 7mm will let in more light than the eye can capture resulting in washed out skies. Anything smaller that 4-5mm will not provide enough light to see the really dim deep space objects.

Thank you very much!

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