My Nikon 50mm 1.4 AF is having problems focusing.

Can you get hold of another body to see if it still does it?
 
If its indoors and the light isn't too good then it may well hunt for focus..:shrug:
 
Go from infinity to close and back to infinity without managing to "lock on" to a subject. If there's no definite thing for the AF to grab onto in the selected AF point, any lens can have this "problem". Try on a subject with a bit more contrast and see if it manages to AF then. AF is pretty good these days but it isn't infallible.
 
Nod said:
Go from infinity to close and back to infinity without managing to "lock on" to a subject. If there's no definite thing for the AF to grab onto in the selected AF point, any lens can have this "problem". Try on a subject with a bit more contrast and see if it manages to AF then. AF is pretty good these days but it isn't infallible.
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Thats exactly what it does, im glad i know the technical term! It has done it twice before on peoples faces, it was inside but I find it hard to get my head round when I did the Gig fine. This is my first dslr, maybe im expecting the equipment to be too perfect?
 
My 1.8 hunts whenever I use it in any light conditions, but just put it down to the lens characteristics. Not constantly thought, I must state.
 
Faces in the crowd are generally a bit poorer lit than the band. In very low light situations, you may well be better off trying to manually focus - but that can be a challenge too! (If you can find one, there is such a thing as a f/1.2 50mm Nikkor - but MF only and VERY shallow DoF at max aperture.)
 
Nod said:
Faces in the crowd are generally a bit poorer lit than the band. In very low light situations, you may well be better off trying to manually focus - but that can be a challenge too! (If you can find one, there is such a thing as a f/1.2 50mm Nikkor - but MF only and VERY shallow DoF at max aperture.)
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It wasnt at a gig i had the problem but as its only happened a few times i think im just going to keep an eye on it.
 
My nikon 50mm 1.4af has similar problems but mainly when it is fully open and it is also very soft, however, it is much better when it is stopped down...also it is much better on my Nikon D70 body than my fuji s2..i thought it was faulty at first but now reckon that it is just one of the quirks of a nifty fifty, a bit of an aquired taste.
 
paulc said:
My nikon 50mm 1.4af has similar problems but mainly when it is fully open and it is also very soft, however, it is much better when it is stopped down...also it is much better on my Nikon D70 body than my fuji s2..i thought it was faulty at first but now reckon that it is just one of the quirks of a nifty fifty, a bit of an aquired taste.
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the lens is always wide open during focusing, it only ever stops down as the photo is taken, you want it to be wide open during focusing so that it lets in as much light as possible to help the camera. You both are probably asking unreasonable tasks of your cameras.

ensure that you have a focus point over an edge of contrast during focusing to help the camera out.
 
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