Which lens is sharper with TC-20E III: 70-200mm f/2.8 VRII or 70-200mm f/4 on D800/E

Started Jan 16, 2013 | Discussions thread
Shop cameras & lenses ▾
MikeInIndy Senior Member • Posts: 1,077
Re: Which lens is sharper with TC-20E III: 70-200mm f/2.8 VRII or 70-200mm f/4 on D800/E

That's correct, if you look at the lens and camera there's a little lever that connects the two that snaps the aperture blades open and shut.  When you mount the lens the camera sets it to wide open and then flips the lever to close down the aperture only when taking a shot or using one of the preview features that shows you the actual aperture you're setting.  On older cameras the "aperture ring" was a stopper that just caused the lever to stop at the setting you chose, on newer cameras the lever is variable and just closes the lens down the amount you pick.  This is why fast lenses generally focus faster because no mater what aperture you decide to use them at, they can focus at their fastest possible aperture.

-- hide signature --

-Mike

 MikeInIndy's gear list:MikeInIndy's gear list
Nikon D600 Nikon AF-S Nikkor 70-200mm f/2.8G ED VR II Sigma 50-500mm F4.5-6.3 DG OS HSM Canon PowerShot G3 Nikon Coolpix 950 +12 more
Post (hide subjects) Posted by
Keyboard shortcuts:
FForum PPrevious NNext WNext unread UUpvote SSubscribe RReply QQuote BBookmark MMy threads
Color scheme? Blue / Yellow