Question about 400 f/5.6 lens?

Started Mar 26, 2014 | Discussions thread
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retired Dog
retired Dog Contributing Member • Posts: 567
Question about 400 f/5.6 lens?

I just received a used EF 400mm f/5.6 lens and being new to Canon I was wondering

what small switch that has 3.5m and 8.5m on it. What does it change and which the

best setting for birding? Thank you. Gary.

 retired Dog's gear list:retired Dog's gear list
Samsung NX1 Sigma 105mm F2.8 EX DG Macro Nikon AF-S Nikkor 70-200mm f/4G ED VR Samsung 16-50mm F3.5-5.6 power zoom Tokina 11-20mm F2.8
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