My lens just focuses in and out without hittting a fix point. So the shutter button doesn't click since I have no final focus after half pressing it. I also observed a darker view on the live view compared to the actual lighting and compared to my other lenses which are working fine. Hope someone could help. thanks
SOURCE: nikon d40 autofocus
This happened to me once on a D70... When mounting the lens, make sure it clicks in all the way when turning counterclockwise. Also it may be worthy to note that both the lens AND the camera must be set to autofocus mode ("A" switch set on both lens and cam).
Marky
SOURCE: nikon d40 autofocus
Dan62, your camera will never be able to focus on objects with no contrast. The manual specifically states this. However, you can put the AF marker over something with some contrast, half press the shutter, so that it will focus, hold the shutter button halfway while you recompose the shot, and then press it all the way.
A note to others using the D40/D40X/D60 that are having problems with autofocus: please remember that this camera will not autofocus with mechanically driven lenses. It will only AF with "AF-S" or "AF-I" lenses.
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