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A comment on How to Discover a Galaxy with a Telephoto Lens. Parent comment

Re:How to Discover a Galaxy with a Telephoto Lens by Florin_Andrei on Thursday January 28, 2016 @06:49PM (#10992475)
Make no mistake, in prime focus photography the brightness of extended objects does not depend on the size of the scope, but the size of the generated image is still proportional to the size of the instrument.
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