When I use my 18-55 mm lens, my focus lock does not function, my shutter release is disabled and I get a r04 code and when I change the resolution the codes go from r04 to r10 to r16. This is only happening in the auto mode?
SOURCE: Nikon 18-200 autofocus lens won't
OK I just fixed it, thanks to Ken Rockwell.com who says:
"Once in a blue moon my Nikon 18-200mm won't focus on my D200. Manual focus works fine, but the lens won't autofocus no matter what I do. It's annoying!
Of course the camera needs to be pointed at something with contrast, lines or texture. Point it at the sky and nothing autofocuses. That's normal.
One time this was so bad I thought for sure I was going to have to send my lens in for service, since nothing would get it to go.
Then I discovered the problem: I had knocked the AF switch on my D200 to M. This switch is easy to knock and I had forgotten to check the obvious. There also is a switch on the lens which is not easy to knock, but I have left the lens set to M shooting at night, and I forgot to return it to A/M the next morning.
This fixes most of my problems.
Rarer is when the lens honestly won't focus. When this happens I turn the camera off and on. If this doesn't fix it, turn the camera off, press the lens release button and rotate the lens back and fourth a couple of times. This will clear any dust off the electrical contacts and focus returns."
SOURCE: r10 error code
rXX on the LCD normally indicates how many exposures the buffer can currently hold. I'm not sure why you're getting this problem but try the camera on a different quality setting to see if you still get r10 or if the message changes.
SOURCE: Nikon D80 black spot center of photos
There is dust on the imaging sensor, and it will need to be cleaned off. A local repair shop can take care of this, or search photography forums for proper technique. Note, improper cleaning can damage the sensor, so use caution.
SOURCE: Zoom ring on 18-55 mm lens is locked/stuck
Are you sure it's the zoom ring that's stuck, and not the focus ring? The focus ring doesn't move when the camera is in autofocus.
If it's indeed the zoom ring that's stuck, you can spend more money than the lens is worth in repairs, or buy a replacement (circa 35 dollars on ebay) for dreadfully cheap. Good luck.
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.
If a lens has an "A - M" switch, move it to "M" to manually focus. If the switch
says "M/A
- M " then leave on M/A (unless you're going to be taking several or more in manual mode), as these lenses may be focused manually at any time in either position. As soon as you tap
the shutter button in M/A you return to autofocus.
More advanced lenses, like the 18-200mm, 70-300mm VR and 18-135mm,
and any lens with an M/A position, may be focused manually at any time
without moving any switches. Leave them in their A or A/M positions.
I hope this helps and good luck!
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