My new Canon EOS 400D doesn't complete the picture cycle when the shutter release is pressed. When I switch it on everything looks fine. The display on the LCD is fine and reports whatever program I have it on. However as soon as I take a picture the camera lock up - at this point the LCD goes black and I cant even power the camera off. The only way to reset it is to take the battery out and put it back in again. On replacing the battery in the camera the proccess completes and the camera is returned to its normal mode only to lock up again if the shutter release is pressed. I have tried with and without the CF card and on every program.
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You need to understand the relationship and teractivity of aperture, shutter speed and iso. In Av mod, you choose the aperture and the camera makes thw shutter speed agjustment, In Tv mode, you set the shutter speed and the camera makes the aperture adjustment, In manual, you have to set both shutter speed and aperture manually. If the ISO mode is set to AUTO, the camera chooses the sensors sensitivity to light automatically. Change to specific ISO (200-400 for daylight and 799-1600 for night). Take a picture in AV mode and note what shutter speed the camera chose. Then switch to TC mode choose the same shutter speed and see if camera chose the same aperture(f-stop) you chose in first shot. Change to Manual and choose same f-stop and shutter speed the camera chose for you in the other modes. Compare all three photos. They should be almost if not exactly the same exposure wise. In Tv mode choose a dlowers shutter speed, In Manual choose a combo of slower shuuter and wider f-stop(smaller number). Read your manual.
There is no tme lapse function on the 400d however a search on ebay can come up with some 3rd party electronic shutter releases which have time lapse function fitted.Most are from Hong Kong but dont be put off I have bought lots of theses 3rd party accessories (battery grips, off camera flash cords,remote shutter releases etc) and all work faultlessly. Here is one of many.I do not own this one personally but I have several items by the "Yongnuo" company and they are great.
Take the lens off the camera and look through the lens. Is there anything obstructing the light?
Now have a look inside the camera body. Same thing, anything there that looks like it shouldn't be? If look up into the cavity you should be able to see the focussing scren clearly - any obstructions there?
Finally, with the lens off, switch on the camera and go through the menu until you find the sensor cleaning option. Select this. The internal shutter will open and allow you to see the CCD sensor. Have a look and make sure it is also free from obstruction.
You will need to switch the camera off to release the shutter.
Put everything back together and check the pictures again.
If still no joy, then it sounds like the CCD sensor is faulty and the camera needs a repair from an authorised Canon repair centre.