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Michel Richmann / luminous landscape :
Autofocus Control Switch
Nikons have a switch which controls whether the camera is in single shot, continuous, or manual focus modes, located on the front of the body to the left of the lens mount. On Canons this setting is performed with a modal button on the top panel along with turning the main control wheel.
In my opinion the Nikon switch is an undesirable design, though it's been there since the earliest days of Nikon's autofocus cameras. It's a true mechanical switch, engaging the AF mechanism mechanically on older lenses that still use the in-body motor, which Canon never had. So while Canons don't need a mechanical switch, and Nikon's do because of their support of legacy lenses, I still have a problem with the design.
That problem is that even though the switch is pretty stiff, at least a couple of times a day I find that I have accidentally moved it off its intended position, and there's one chance in three that this will be to Manual, in which case AF is disabled.
I'm not alone in experiencing this problem, and many Nikon users shrug and say that they too are bugged by it. I can only suggest that Nikon find some way of designing an interlock so that accidental moving of this switch can't happen. (Maybe this will become like my bitching about Canon's lack of MLU. Year after year of begging with no response. Sound familiar?)
کد:
http://www.luminous-landscape.com/reviews/cameras/nikon-d3-d300.shtml
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