Focus problem E 61:00 flashes in the top right corner and it won't focus

There are several contributing factors to this problem and I'll try to list a few that may be the cause.
All Canon EOS camera auto focus modes us contrast to focus this means simply that no contrast there is no focus. There is a small green dot in the lower right corner of the viewfinder that will come on and stay on solid when auto focus as been achieved. By default the shutter will not operate "click" if auto focus has not been made.

Here are a few examples of where auto focus will ether search (focus back and forth) or fail completely.

A solid painted wall, glass between the camera and subject, mirror, chrome, any large body of water, clear sky. Another place you wouldn't expect is clear skin in your subjects face or body.

Cameras with multiple focus points and set to other then the middle will have a problem if the photographer is still attempting to use the center focus point.

Look for the green dot in the lower right corner of the viewfinder that's your focus confirmation.

This is done in your camera not with the lens. On most Canons there is a button with a picture of a box with focus points in it. You hold this down whilst turning your main dial (the one you use to change shutter speed) this will cycle through your focus points. On the 40D and most other cameras this button should be at the very right hand top corner of the back of your camera.

The answer to your question can be found at...

This website

All but the very best flashes can not recycle atthat flash rate. For burst mode, you probably want to use focus modeAF-C or AF-A.
Morris

Page 73 in the manual; If the flash fires in L or H mode (pg. 65), only one picture will be taken each time the
shutter-release button is pressed. The shutterrelease may be briefly disabled to protect the flash after it has beenused for several consecutive shots. The flash can be used again after ashort pause.
The flash can take several seconds to recharge andduring that time the shutter is disabled. NR will also reduce thenumber of frames per second that you can take, and of course yourshutter speed has to be fast enough to allow for 4.5 fps.
In AF-S the shutter won’t fire unless the camera has achieved an in-focus state and the focus is locked.
In AF-C the camera continually focuses, but that isnot the same thing as being in focus. As you move the camera or yoursubject moves, the in focus state will come and go, but the camera willattempt to continuously re-focus. BUT, the shutter will fire even ifwhen the AF system has lost the in-focus state and the picture is outof focus.
In the D90 manual it indicates that the AF-A modewill only fire when the green in-focus light is on, just like in AF-S.The problem is that you probably won’t get 4.5 fps unless both thecamera and the subject are stationary and no time is lost between shotswhile the camera re-focuses.
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Brooks
http://bmiddleton.smugmug.com/

what i do is usually put it onto manual focus then back to auto focus, what it may be is that you are using the wrong lens for your subject :/

dont worry about the magic focus check the convergance that all guns align.

hi there, its a decousing problem, look for the connection of the decousing which is connected behined the pic tube to the board. check some electronic parts, it may be temperature resistor, termistor, transistors, capacitor, etc.ty

that problem is on the lens assembly...one the two motor is not working properly...sometimes it is a poor connection to the socket of the main board...other is photo sensor of the lens(not the ccd image sensor)or the driver ic of the 2 motor...i suggest you have to go the service center for repairing you camera cause it need to disassemble the camera for doing this....

ake sure your subject is within the camera's range. You should be at least 20 inches away to take a picture without the flash, and 20 inches to 8 feet away to take a picture with the flash. You can take a picture as close as 8 inches in macro mode. When you take macro close-ups, make sure you have adequate lighting (with the flash disabled). Using a tripod will help you capture sharp pictures. Make sure you hold the camera steady after you press the shutter button (until the red light starts to flash), and your subject isn't moving. If you are shaking the camera when you lock the focus, a warning icon appears in the right corner of the LCD. If you want to photograph a moving subject, you can change the shutter speed while the camera is connected to your computer. Try increasing the shutter speed. See Chapter 4 for more information about how to change the shutter speed from the LCD menus. Make sure your flash is not set to flash off. When you focus on a nearby object, your picture's background may appear blurry. Try changing your focus.

Make sure your subject is within the camera's range. You should be at least 31 inches away to take a picture without the flash, and 31 inches to 8 feet away to take a picture with the flash. You can take a picture as close as 8 inches in macro mode. When you take macro close- ups, make sure you have adequate lighting (with the flash disabled). Using a tripod will help you capture sharp pictures. Make sure you hold the camera steady after you press the shutter button (until the red light starts to flash), and your subject isn't moving. If you are shaking the camera when you lock the focus, a warning icon appears in the right corner of the LCD. If you want to photograph a moving subject, you can change the shutter speed while the camera is connected to your computer. Try increasing the shutter speed. For more information, see Chapter 6. Make sure your flash is not set to flash off. When you focus on a nearby object, your picture's background may appear blurry. Try changing your focus.