Question about Canon EOS 400D / Rebel XTi Digital Camera

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Canon error code 99

Hi there! I just bought a Canon 400D and tried to use a zoom lense from my old Canon SLR, but can't take any photos - 'error code 99, turn camera off and on again' - that doesn't work, though. Camera works perfectly with 28-55 lens that came with it. Why does the old lens not work? Thanks for any help.

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  • petjo Mar 02, 2008

    I get error 99 when I use the green auto mode. Ok if I use other settings like Av or Tv. Ok also on portrait. I should add I am using lenses from my old SLR. Peter Young

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Your camera performs a quick 'integrity' check before each shot and goes into error 99 mode if the lens in incompatible or has a diaphragm problem. ( it will also display e99 if the shutter or flash unit is not ok but this does not apply here ). This is how you can check whether the diaphragm mechanism is ok : attach lens to your old camera and set camera to AV and set F stop to 16 . open back and release shutter and look through the back to see if your lens is closing to F 16. If it is closing fine then the lens is ok but is not compatible with your D400.

Posted on Sep 10, 2007

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Posted on Jan 02, 2017

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1 Answer

Canon 400d err99 message when trying to take a picture. how do I resolve problem?


Error 99 also refers to communication problems between lens and camera, so worth cleaning the contacts...you can't lose anything in doing so.
1. Take your battery out and reinsert it - this will clear it.
2. Clean your lens contacts carefully with a plastic pencil eraser. Sometimes corroded contacts can cause errors like this.
3. Try the camera with different lenses - if it is occuring with several lenses, it may point more strongly to a camera fault.
4. Make sure you have the latest firmware installed.

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Whats the best economical lens to use for indoor photograph with


If you are new to photography in general and especially SLR photography I would suggest holding off on buying any lenses besides the 18-55mm.

The reason I suggest not buying extra lenses just yet is coz you need to get to know your camera and if you are new to SLR photography then you need to get your fundamentals right. Sure the 400D will let you shoot in full auto mode but you will really not learn much doing that and certainly not be making the most of your camera in that process and that will extend to your new lenses too.

Get used the the control, the 18-55 is a great little cheap lens with the pop up flash it will work great for most family pics. The 55-200mm is a new "cheap" lens, its been marketed as letting you go beyond 55mm thats why it starts at 55mm goes to 200mm.

Hope this helps you...

Jan 02, 2009 | Canon EOS 400D / Rebel XTi Digital Camera

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Lense will not work with SLR Nikon D90


This lens is too old for the D90, it has not got the electronics for metering and autofocus.
You can use it manually in M mode but you will have to set the aperture and shutter yourself.
The D90 manual has a section on compatible lenses, page 228 in my version.
This recommends CPU lenses for the D90, type G and D.

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I have a digital slr 400d canon camera. It is getting the message error 99 after taking a few pictures. what can I do to get rid of it?


Hi There,
on these models the 99 code is generic, and can mean a bunch of different errors, but usually it is dirty contacts. It can be on the battery, or more likely between the lens and camera body.

Check out this link here, there are a lot of good things to try.

http://www.fixya.com/support/t142115-canon_displaying_err_99

Good luck. And don't listen to the comments that Canon is bad, I have had Canon's for years, and they are great cameras!

Dec 08, 2008 | Canon EOS 400D / Rebel XTi Digital Camera

1 Answer

Cannon Eos 400D Err 99?


Error 99 is a NONSPECIFIC error message. It is almost always associated with the LENS. I first got this error on my EOS 20D whei I tried to use an older Sigma zoom lens (7 years older than the camera). I don't use off-brand lenses with my Canons. Try removing the main battery first followed by the time & date battery which is hidden in the battery compartment beside the main battery. This will reset your camera. Good Luck!

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I have error 99 in my camera canon 400d


Ifd the camera is only 3 months old - return it for replacement

Sep 01, 2008 | Canon EOS 400D / Rebel XTi Digital Camera

1 Answer

Error 99 in canon 400D


You will get that error when using some lenses other than Canon. A lot of the older Sigma lenses have that issue. Do you get this error when using newer Canon EOS lenses?

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17 Answers

My Canon is displaying - Err 99 what should I do?


Just found this info which should help diagnose the err 99 issues (info direct from Canon apparently)

To isolate the cause of the issue, do the following: -

1. Turn off the camera.
2. Remove the lens, battery, and CF card.
3. Allow the camera to sit without power for approximately 20 minutes.
4. Insert only a fully charged battery, and turn on the camera.
5. Depress the shutter button as you would to take a picture.


Does the “ERR 99′ message appear? If so, the camera may be faulty and requires a service. If it does not, then: -

1. Turn off the camera.
2. Insert the CF card.
3. Turn on the camera.
4. Format the CF card in the camera.
5. Depress the shutter button as you would to take a picture.


Does the “ERR 99′ message appear? If so, then the CF card is faulty. Try a different card. If the message does not appear: -

1. Turn off the camera.
2. Clean the gold contacts on the lens by GENTLY rubbing them with a pencil eraser or soft cloth. Keeping the camera face pointing down, also clean the gold contacts on the camera, being careful that you do not let any debris fall into the camera body.
3. Reattach your lens.
4. Turn on the camera.
5. Depress the shutter button as you would to take a picture.
If the “ERR 99′ message only appears when one particular lens is attached, then that lens should be examined by a service technician.
If you see the “ERR 99′ with a different Canon lens attached, then the camera is faulty and should be serviced.

Apr 10, 2007 | Canon EOS Elan 7ne 35mm SLR Camera

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