Question about Canon EOS 400D / Rebel XTi Digital Camera with 18-55mm Lens

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Halo around af points

When I look through the viewfinder of my Canon Rebel XTI, the AF points are blurred. I noticed a small halo when focusing(I had it set to focus with the middle point). I went to change the focus points and had them all lit up at once and the halo is around the 3 bottom points and the top point really badly and the others only slightly. I cant find anything on the net about it. I can't see that its causing a problem with my pictures, what should I do? What's causing it? I'm afraid to attempt to clean anything. PLEASE HELP!!

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Re: Halo around af points

I have the very same happening to my 400D, I took it back to the shop that I bought it in and they said it was no problem and like you it doesn't do anything to my photos, Willie.

Posted on Oct 27, 2007

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Canon auto focus lens will not operate

If lens has AF/MF switch, make sure it's set to AF. Check/clean connectors between camera and lens. Try with good light source.

Dec 04, 2012 | Canon EOS 400D / Rebel XTi Digital Camera

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Hi I bought my canon 1000d on september 2009 and a year later the autofocus doesnt want to work. In the viewfinder on the far right a number 9 has a green dot flashing next to it. Please help!! Ruthven...

The 9 you see is the maximum "burst" which is (pictures made in rapid succession) and is not an issue with your problem at this time the flashing green dot is the in focus confirmation light and it's good that you are seeing this as we will use it to remedy the problem.

Manual focus switch
Diagram here
What I want you to do is put the AF-MF switch in the manual mode if it's already in manual mode then that was your problem switch to AF and go take some pictures. If it's in AF mode switch to MF make sure teh camera is on and look through the viewfinder at a subject say 15 feet (4.5 meters) away something that has contrast then turn the manual focus ring on the camera slowly until it appears to your ey that it's coming into focus when it's in focus the green light will come on solid, now you know what you are looking for focus an several different objects at different distances and focus manually. Now switch the lens over to AF (auto focus) and focus on the same thing but let the camera do the focusing What auto focus will not focus on in something with little or no contrast like water clear blue sky a painted wall mirror chrome glass and a few other things.
Here is another diagram to check make sure you are in the correct mode.
Now for the focus point in the viewfinder make sure it's in the center position.
To adjust the focus point do this
Once you have the camera set to the center focus point and the correct AF mode (one shot) auto focus should return to your camera. Have fun Robert from London Ontario Canada

Jan 10, 2011 | Canon EOS Digital Rebel XS / 1000D IS...

1 Answer

See-through lens is blurry and does not reflect the change in focus when I adjust the wide angle lens on my digital rebel xti. What's the problem and how can I fix it?

Check the AF/MF switch over the lens left side. Should be on AF to let the camera focus by itself. If not, you have to manually focus using the focusing ring.

If the camera is in AF and still no focusing, considere to carry your camera for service.

Aug 01, 2009 | Canon EOS 400D / Rebel XTi Digital Camera

1 Answer

Cleaned inside of viewfinder, now AF focus lights gone

Then you learn, when everything works fine, dont mess with it! Have a look at the gold pins that rely the body to the lens. Also check that your lens manual switch focus is engaged... Try a friend lens to see if its your cam or the lens...

Jul 29, 2009 | Canon EOS Digital Rebel XS / 1000D IS...

2 Answers

Auto focus suddenly stopped working

This may not be the same as your issue, but our AF stopped working as well. I tried all the recommended fixes - removing the card and battery, recharging the latter, removing the lens and cleaning the contacts, etc. None of those things worked. However, I then switched to MF, requiring me to turn the barrel, and I realized it was stuck and just needed a little force to get unstuck. Might have been the humidity. Anyway, our problem was solved - AF was back to normal after that.

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Canon EFS Lens question- please help!!

Make sure that the switch on the lens is set to AF. If that doesn't work, you may have a faulty lens. The EFS 18-55 is not a high quality lens.

Mar 10, 2008 | Canon EOS 400D / Rebel XTi Digital Camera

5 Answers

My Canon digital rebel will not autofocus correctly. My camera has 7 points autofocus, but it will only autofocus on the far right point. All other points are not used. I have had the camera for 14 months...

I had this problem awhile ago - you must have accidently adjusted the focal area - it is sooooo easy to do without realising it. Here is what I was told:

Most likely, you have changed the AF point, which only takes effect in the creative modes (Manual, Av, Tv, P, etc)

There should be a button on your camera that has a grid like pattern above it, like
- - - - -

or so. press that, look through the viewfinder, and move the shutter or rear wheel, you should see the different AF points like up in red, and as you turn different ones will light up, and eventually all of them. also, you can look on the screen on top (or back, if its a rebel) and it will show you which ones are selected while in that mode, instead of looking through the viewfinder.

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