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

1 Answer

Autofcous and manual focus do not work

Autofocus mode tries to turn the lens but nothing happens. A green light to the right of a number 9 in the bottom right of the view finder blinks and the camera does not allow the picture to be taken. When the lens is switched to manual focus it still will not focus, and the distance scale on the lens dose not move. The picture can be taken but is, of course, out of focus. The lens is a Cannon EF 50mm 1.4.

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  • Anonymous Mar 29, 2009

    i have exactly the same problem

    i do't know wat 2 do

    it is just now focusing

  • daveconforti Apr 06, 2009

    i have the same problem, I am able to adjust the focus manually and take pictures; however when in auto focus, the lens focuses, then flashes a green light and will not take a picture. Any suggestionis?

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  • 153 Answers

Excuse me if this is a dumb question but you wouldn't believe the things people do...., but in manual mode are you actually manually trying to move the lens? as manual mode means just that you take hold of the lens and turn it. If it wont turn it sounds like the lens is jammed and needs returning/repairing.

if taking hold of the lens and turning it works for manual mode, take the lens off and clean the gold contacts on both the camera and the lens with a pencil erasor this may bring the auto focus back to life, switch back to auto and try again, if not its most likely the lens but take the body to a canon store and try another lens just to double check the body is ok

drop me a line if i can be of further assistance

best of luck

Posted on Jun 09, 2008

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Posted on Jan 02, 2017

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1 Answer

Is it possible to manually control the focus on this camera? (Konica Minolta Maxxum 400si SLR 35mm Film Camera) I need to be able to manually control the focus, apeture, and shutter speed for a film...


The description of the manual focus is available in part 2 of the manual, page 40. The manual is available as a PDF here: http://ca.konicaminolta.com/support/manuals/film-cameras/film_af_slr/index.html#si_series . It is the seventh camera in the SI series in the list.

To manually focus the lens, press the focus-mode button on the front of the camera (bottom left when you are behind the camera) until M. focus appears in the data panel. If you have an AF lens, turn the focusing ring until the subject appears sharp. If you have an xi-Series or AF Power Zoom lens, pull and turn the lens control ring.

The focus indicator will light when the subject is in focus. To return to autofocus mode, press the focus-mode button again. The camera will also return to the autofocus mode if you press the program reset button.

I hope this helps.

Cindy Wells
(in manual focus, you can take a picture even if the subject in the focus frame is not in focus. Often it means you need to take multiple pictures to get a good shot of the subject. The advantage is that you can get some interesting shots.)

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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.
Diagram
tri3mast_180.jpg

Manual focus switch
Diagram here
tri3mast_181.jpg
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.
Diagram
tri3mast_182.jpg
Now for the focus point in the viewfinder make sure it's in the center position.
tri3mast_183.jpg
To adjust the focus point do this
tri3mast_184.jpg
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

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Does your lens try to focus or it doesn't try at all? You will have to understand that for the camera to autofocus successfully, theere should be adequate light and contrast. That means, autofocus often fail to focus even colored walls or objects under dim light. If you tried all this in daylight, outdoors, then the autofocus sensor is faulty. Please reply with details of how you tried the af.

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Hello,

I don't own a K10D, but I do own a K100D which I have successfully used both manual focus & auto-focus lenses from my old Pentax stash!

1) If it is a manual focus lens, you need to turn off Autofocus on the body of your K10D. On my K100D, there is a switch on the side of the lens mount that says [-MF or -AF]. "-MF" is manual focus mode & "-AF" is autofocus mode. Since your lens doesn't have autofocus capability, turn it to the "-MF" mode.

Also . . . When I press "Menu" and go to "Custom Setting", I change two settings . . .

1) I change "Using aperture ring" to "Permitted". This allows you to use manual lenses (M lenses) that do not have an auto(exposure) setting, and also lets you use Auto lenses (A, KA, KA2, FA, etc.) in either the Auto or manual aperture setting modes.

2) I change "Fl with S lens used" so that even with a manual focus lens, although I don't have autofocus capability, my K100D beeps and shows a little red square in the viewfinder when I have successfully focused manually!

The K10D should have the same options.

This should get you up and running!

I have had a load of fun with my old lens on my new digital Pentax!

Take care & Happy Imaging!
Glen
:)

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When the camera is in auto focus mode, it will not take the picture until it locks onto a subject. If there is not enough light, the camera will "hunt" for something to focus on. Since it can't define any edges, it won't allow the shutter to release.

The D40 base model does NOT have a powered focus lever for autofocus, so if the autofocus is not working, suspect the lens.

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