Light bleed around AF point

I searched the forum but did not find an answer for this:

I experience light bleed on one of the AF points on my Rebel XT (when selecting either that specific point or all points). I am guessing that the light bleeds on the focus screen (?). From what I know, this not too uncommon of DSLRs (and my friends have the same issue with at least one AF point each on their XT's), and I am aware that it does not affect shooting/photos at all, but I do find it somewhat annoying. With that said, is there a way to correct this issue so that no bleeding occurs when selecting an AF point? No such bleeding occurred when the camera was brand new, and I have never touched any of the elements inside the lens mount area. I am not even sure how or when the bleeding began. Your input is appreciated.

This is the first time I've ever heard that term, and I've never seen it in the nearly 8 years I've been shooting with Canon DSLRs. Can you explain the phenomena more clearly?

Mark

krepta wrote in post #3932218
I searched the forum but did not find an answer for this:

I experience light bleed on one of the AF points on my Rebel XT (when selecting either that specific point or all points). I am guessing that the light bleeds on the focus screen (?). From what I know, this not too uncommon of DSLRs (and my friends have the same issue with at least one AF point each on their XT's), and I am aware that it does not affect shooting/photos at all, but I do find it somewhat annoying. With that said, is there a way to correct this issue so that no bleeding occurs when selecting an AF point? No such bleeding occurred when the camera was brand new, and I have never touched any of the elements inside the lens mount area. I am not even sure how or when the bleeding began. Your input is appreciated.

If you're talking about what I think you're talking about, i.e. the light from one AF point faintly illuminating some other AF points, then that's kind of normal. It only occurs under certain lighting conditions. Or are you noticing it all the time?

Focusing screen is displaced just a little bit.
If you want to play with it, you can position it properly, but there is a great chance that you’ll scratch the focusing screen, the mirror or both.

Don’t worry, that’s nothing.

You're in Irvine, take it to CFS and see what they say.

cdifoto wrote in post #3932322
You're in Irvine, take it to CFS and see what they say.

And if you do, let us know what the fix was.

Mark

Mark_Cohran wrote in post #3932248
Can you explain the phenomena more clearly?

Specifically in my case, the bottom AF point lights up like the rest of the AF points, but in addition, there is a soft glow of the red light surrounding the point whose area is about twice that of the box in which the point lies. This phenomenon does not occur with the other points, and, as previously stated, did not occur early on when the camera was still new. It is continuously present (i.e. in all lighting conditions, save for extreme ones I suppose), although less noticeable in the daytime in bright sunlight. I have just noticed it more lately because I have done more night and indoor shooting.

For one of my friends, the effect is even more pronounced and the AF point at issue in his case appears fainter than the rest as well. Of course, it is not a big deal, but if it can be helped, all the better!

Edit: About what Hermeto mentioned, I also believe it has to do with the focusing screen, but since I can't do anything to it in the XT anyway (they're not interchangeable), I guess I might be stuck with this. Mark and cdifoto, I don't believe this problem is of large enough magnitude to warrant a trip to the service center!

krepta wrote in post #3932444
Specifically in my case, the bottom AF point lights up like the rest of the AF points, but in addition, there is a soft glow of the red light surrounding the point whose area is about twice that of the box in which the point lies. This phenomenon does not occur with the other points, and, as previously stated, did not occur early on when the camera was still new. It is continuously present, although much less noticeable in the daytime in bright sunlight. I have just noticed it more lately because I have done more night and indoor shooting.

For one of my friends, the effect is even more pronounced and the AF point at issue in his case appears fainter than the rest as well. Of course it is not a big issue at all, but if it can be helped all the better!

I think the suggestion to go to the Canon Service Center is your best bet as it is probably a result of a misaligned focus screen (but I'm not an expert there). Best of luck to you.

Mark