Question about Quantaray (261660245) for Nikon AF Lens Converter
I am having getting my camera to take a picture in sport mode with this lens.
A 2x tele-extender will rob you of two stops of light. This is simply a matter of physics: you're looking at only one quarter of the scene, so you'll only get one quarter of the light.
You specified neither the camera body you're using nor the lens you're using the tele-extender with. Most Nikon bodies will not autofocus with lenses slower than F/5.6. (Actually, they might, but F/5.6 is what Nikon specifies.) With the two-step penalty, a lens would have to be F/2.8 or faster in order to autofocus.
The solution is to either get a faster lens ($2000 or so) or to switch off the autofocus and go manual.
Posted on Feb 05, 2010
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Posted on Jan 02, 2017
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