Kenko DGX 2x Teleplus Pro 300 with 60D

Started Jan 27, 2013 | Discussions thread
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Flying Fish Veteran Member • Posts: 4,473
Re: Kenko DGX 2x Teleplus Pro 300 with 60D

You're assuming too much understanding on my part.    My question is if Venus is so tiny, how does it make a difference if the maximum aperture is f/5.6 or f/11 for such a tiny object?  I'm having trouble visualizing the geometry your explanation implied.  And from there, if you can focus on tiny Venus, then why not on an elephant?


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