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Nikon DSLR Cameras
General Digital SLR Cameras
Center point is F8 but?
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<blockquote data-quote="wornish" data-source="post: 436465" data-attributes="member: 15434"><p>All modern DSLRs auto focus at the maximum effective aperture i.e. with the lens wide open and only close down to the set aperture when you press the shutter. When you look through the viewfinder you are seeing the scene with the lens open. If you press the preview button you will see the scene at the set aperture.</p><p></p><p>So if you had the Tamron set at 600mm its maximum effective aperture would be f/6.3. If you have your aperture set on the camera to f/11 it would still focus first using f/6.3 then when you press the shutter it would close down to f/11 to take the shot.</p><p></p><p>Hope that helps.</p></blockquote><p></p>
[QUOTE="wornish, post: 436465, member: 15434"] All modern DSLRs auto focus at the maximum effective aperture i.e. with the lens wide open and only close down to the set aperture when you press the shutter. When you look through the viewfinder you are seeing the scene with the lens open. If you press the preview button you will see the scene at the set aperture. So if you had the Tamron set at 600mm its maximum effective aperture would be f/6.3. If you have your aperture set on the camera to f/11 it would still focus first using f/6.3 then when you press the shutter it would close down to f/11 to take the shot. Hope that helps. [/QUOTE]
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Nikon DSLR Cameras
General Digital SLR Cameras
Center point is F8 but?
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