1D Mark III Focusing problem: is this true?
1815527
Some early releases had a problem with the mirror box which caused intermittent focusing problems. Nikon is going through the same thing with the D800 right now and experiencing focus problems due to mirror misalignment. Canon came up with a fix and installed new mirror boxes in all cameras affected. With serial numbers starting in the 54xxx range the fix was manufactured in the camera. The box for these cameras will have a blue dot on them. There is a white dot in the battery compartment for the ones recalled and fixed. The biggest problem with autofocus issues is that the settings have a steep learning curve. You have to know how to change the various settings for different situations when shooting AI Servo as well as when to apply the focus point assistance and when not to. Most folks claim they have a defective camera when all they have is a lack of understanding of how to make the necessary adjustments.
1820637
Yeah, it doesn't affect the pictures at all you're right. Sometimes it's annoying when I'm trying to use my 50mm prime, as I have to manually focus that and the blurry line doesn't help.I called Nikon also and they said I could ship it to them and they would look at it. I'm slightly worried to do that because I'm afraid they'll do something to screw it up worse. I guess I can live with it. If you send yours in, could you let me know if they actually fix it by replying here?
740233
The light is spread onto 4x the surface. That is why autofocus is difficult. Sharpness and contrast suffer with a T/C. I have a Sigma 170/500. Results are ok if not to picky.
220778
Oh! It happened in very bright sun in my backyard. I noticed it during night shot as well. When I zoomed in on a street lamp in the night about 50 yards away, it went out of focus and stayed that way. Very strange focusing system. I tried all the AF settings, but the result was the same. In the tele mode, it looks like this system has some serious focusing issue.
1359667
I have this problem But I don't understand your solution, Bruce. Could you or someone explain it again please?You appear to be saying that if the camera is at something like a standard focal length you can choose both Macro and MF. But you can't - not on mine anyway!In my experience, the camera will not focus below 1ft. The image stays blurred and often the yellow central focus frame will display a question mark.Auto-focus does not work in Macro either - so to all practical purposes the camera has no Macro mode. If someone has a fix for this I'd be very interested.
113722
Yes. I just tried it. You can also focus with the ND side to side switch. Also, like ryuxis stated, the zoom is considerably slower.
1028023
you have focal/focus point,which is what it says.depth of focus is what you can use for average focal/focus. too little makes it hard to stay in focus,too much is all blur.
2112521
No, both lenses do not focus on a common point. The point of focus is extremely close to the lens, and the lenses are pointed straight ahead. It is necessary to use one eye at a time.
1105177
This is indeed a common problem with digital compact cameras but with this one I don't notice any delay. Maybe because I always start with half pressing the shutter before I take the shot. In this way the focusing is done already.
1864062
I realize that this is in response to an old post, but in answer to the question in the second line of Jason's March post...... No, the 10-22mm lens does not function to its full extent on a 1D Mk111, and vignettes badly up to around the 15mm mark.
201982
This is partly a function of the speed of the RAM on the SD card and the time these pocket digicams take to acquire focus. You need to have the fastest possible SD card to minimize this. Personally I can't stand it, my old Canon F-1 film SLR has instant response to the shutter!
1588426
The 1.4X III does much better in my Canon T3i with the Canon 70x200 1:4L IS USM III Lens. Picture SHARPNESS is not a problem.
697449
i have this camera and the 1ds mark ii 16.7 mp for me there both take sharp pictures,of course with the L lens,the iin is faster,the 1ds mk ii,you get higher resolution,that's it.that's why i have 2 cameras,one slow and one fast,one 1.3x versus 1.0x crop factor
585645
I think you are right here. I don't believe it is a lens problem as I have see this problem across a couple of lens. I did two things that seem to make a different, the first was I completely reset all the camera setting and second thing I did was up grade the camera fireware from version 1.0. 4. to version 1.0. 9. This seems to have made a difference.
500331
I've had mine for almost a year now. Unlike the previous posters, I haven't had any issues with focus. However, I have recently discovered 3 dead pixels in the CCD each separated pretty far from each other. I shrink most of my pictures for web use so it's not really an issue with me but it's not good when there's more than a couple of dead pixels in your CCD. Otherwise it's been pretty good; I do like it a lot.
2207206
It just so happens that yesterday I tried the 2.0 on my 7D Mark II with the new 100-400 II lens and it lost its AF function. It works fine with the 1.4 extender, though.
739837
I also have this slow focus problem on my D300 and D700. Slower focusing than any other lens I have used. Anyone heard about a fix for this yet?