TAMRON SP 90MM F2.5 MACRO LENS.

greynolds999
Posted 07/04/2011 - 14:24 Link
I would have though an easy test would be to put the camera in Av, set it at f/2.8 and f/4 and see if the shutter speed changes?
Blythman
Posted 07/04/2011 - 14:25 Link
Thanks George
Alan


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