Adapted Nikkor 4/300 or APO telescope for birding?

Started Oct 27, 2012 | Discussions thread
sb123
Contributing MemberPosts: 880
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Re: I have the AFS 300mm f/4 and E-M5
In reply to Kim Letkeman, Oct 28, 2012

I do not think one is visibly sharper than the other at the long end (I own both). Sharpness at the long end is usually determined in practice by factors other than the intrinsic optical quality of the lens, anyway.  At the speeds I use to shoot BIF stabilization makes no positive difference (it might make a negative one).  The 75-300 focuses noticeably faster than the 100-300, hence I think it is a better choice.

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Steve Barnett

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