Comments on: Problems with Sharpness? https://www.birdsasart-blog.com/baa/2009/10/13/problems-with-sharpness/ The blog of bird photographer Arthur Morris Thu, 07 Apr 2011 23:07:35 +0000 hourly 1 https://wordpress.org/?v=6.8 By: Arthur Morris/BIRDS AS ART https://www.birdsasart-blog.com/baa/2009/10/13/problems-with-sharpness/comment-page-1/#comment-68617 Thu, 07 Apr 2011 23:07:35 +0000 http://www.birdsasart-blog.com/?p=751#comment-68617 In reply to Martin Chroust-Masin.

Thanks for sharing your thoughts. As far as I am concerned that is a matter of semantics… I do not consider it an important fact 🙂

]]> By: Martin Chroust-Masin https://www.birdsasart-blog.com/baa/2009/10/13/problems-with-sharpness/comment-page-1/#comment-68566 Thu, 07 Apr 2011 18:33:17 +0000 http://www.birdsasart-blog.com/?p=751#comment-68566 Hi Arthur,
I like your article on Sharpening test, however, I disagree with your following statement
” So using a 500 lens with say an EOS-50D you are really working at an effective focal length of 800mm, not 500mm.”
I believe that you are actually working with a focal length of 500 mm. The sensor is cropping down your picture where it seems to be 800 mm.
I just want to make sure that people do not misunderstand this important fact.

Thanks,

Martin

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