Do you manual focus beyond AF Detection Limit
First post here. I am long time Nikon user (still learning) starting from D70, V1 and now D600.
With D600 the AF detection limit of the central point is F8. I seldom go beyond (most shooting is F2.8 to F5.6 with a few F8) however, those of you who regularly go beyond F8, do you then switch to manual focus?
Inquiring minds want to know.
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#1. "RE: Do you manual focus beyond AF Detection Limit" | In response to Reply # 0upandaway Registered since 16th Dec 2012Mon 25-Feb-13 07:22 PM
There are times I prefer to manually focus, but it's not necessary when setting a small aperture using the viewfinder. The camera will automatically focus using the largest aperture available on the lens and automatically stop down to whatever smaller aperture you select just before the shutter opens. After the shutter closes the aperture returns to full open. Even a lens with a minimum f/5.6 will focus with all your focus points, unless you use a teleconverter or nd/polar filters.
I have not tested how small an aperture is possible to auto focus using live view (it uses a different focusing method) and switching to the aperture ring for control.
#2. "RE: Do you manual focus beyond AF Detection Limit" | In response to Reply # 0dagoldst Nikonian since 02nd Dec 2012Mon 25-Feb-13 07:33 PM | edited Mon 25-Feb-13 07:35 PM by dagoldst
Welcom to Nikonians!
F/8 is not a limit. I autofocus at any aperture and not had an issue with my D70s, D200, and D600 - for example, with landscape, regularly up to f/13.
Are you having problems focusing at higher apertures?
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#3. "RE: Do you manual focus beyond AF Detection Limit" | In response to Reply # 0blw Nikonian since 18th Jun 2004Mon 25-Feb-13 08:38 PM
> With D600 the AF detection limit of the central point is F8
You're misinterpreting the specification. That means that the system is not guaranteed to AF with a lens that is slower than f/8. (Or, more likely, a lens combination slower than f/8 - such as a f/5.6 superzoom with a 2x TC, which is net f/11.)
The reason for this is that AF (as well as metering and viewing) is done at full aperture, regardless of the selected shooting aperture. So for example, since I often shoot macro at f/11, f/16 or even f/32 - yes I know about diffraction - I'm still metering and AF at f/4 or f/2.8. There is no reason to switch to MF for those reasons. (However, for many macro subjects, MF is a better way to work since the placement of the AF target is often less precise.)
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