Thread: focal length vs. aperture
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  #5  
Old 11-02-2008, 08:10 AM
Dennis
Dazzled by the Cosmos.

Dennis is offline 		 
Join Date: May 2005
Location: Brisbane
Posts: 11,827
If astro photography is going to loom strongly in your future, then the F4 ‘scope will be far more efficient in collecting the photons than the slower F9.3 ‘scope.

Cheers

Dennis
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