Topic Author
Posts: 2591
Joined: Fri Jun 27, 2003 4:12 am

Error 99

Sat Apr 24, 2004 3:40 am

Hi guys,

Ive had my 300D for a few months now. Since a few weeks back, my camera seems to keep coming up with 'Error 99'

Ive tried differernt lenses. Although, I have seemed to notice that it is only in certain light conditions. (may be wrong though)

Ive looked the error message up in my manual and it simply says 'None of the Above'

What do you guys suggest I do, im really p*ssed off at the moment!

Simon  Sad
Simon -
Posts: 412
Joined: Sat Oct 26, 2002 3:12 pm

RE: Error 99

Sat Apr 24, 2004 4:04 am

There's not much info here, but the problem does appear to have something to do with non-canon lenses (sigma) in bright light situations.

Start reading from the comments section (under the hyperlinks)

-Peter Fagerström-
Posts: 2888
Joined: Wed Nov 01, 2000 12:52 am

RE: Error 99

Sat Apr 24, 2004 4:04 am

From the Canon Manual, pg. 35 paragraph 2:

Error 99 : You should have purchased a Nikon instead


Do a search on for "Canon 300D Error 99", you get a lot of hits. Seems to be problem with using Sigma lenses (you using a Sigma lens?)

Topic Author
Posts: 2591
Joined: Fri Jun 27, 2003 4:12 am

RE: Error 99

Sat Apr 24, 2004 4:09 am

Nope, not using a Sigma Lens,

I have a Tamron 300mm, Canon 200mm and Canon 80mm.

All seem to be doing the same.
As I said, it seems to appear in certain light conditions.

Simon -
User avatar
Posts: 796
Joined: Tue Oct 29, 2002 8:21 am

RE: Error 99

Sat Apr 24, 2004 9:36 am

Well I guess I'm not the only one.
I do get a lot that err and it is on some special light conditions.
What I do to kind of repairing it is or to take a couple of manually focused shots or to change the ISO, also changing the lens and putting it back works.

I really hate that error and it always happens when the plane that I'm waiting for comes in.

I have a Canon lens but it is kind of old now... I'll be getting my new one shortly and hope that it really helps.

Anyways if somebody can help us out with it it would be great.


Juan APM

All Canon! EOS 5D mk III, 8mm, 17-40, 24-105, 70-200 f2.8, 100-400L
Posts: 1069
Joined: Wed Feb 18, 2004 8:41 am

RE: Error 99

Sat Apr 24, 2004 1:41 pm

Hi Simon
Are you using the vertical grip.
I was having error 99's on my 10D and it was simply a dirty contact on my vertical grip.
Problem solved after 3 months of investigation.
Also if not clean your battery contacts as well.
Take it easy
Topic Author
Posts: 2591
Joined: Fri Jun 27, 2003 4:12 am

RE: Error 99

Sat Apr 24, 2004 2:25 pm


I think its really hit and miss  Sad Sometimes it works, and other times It doesnt. I wrote an email to the place where I purchased it.

I have a feeling that its something bad  Sad

Simon :'(
Simon -
Posts: 4427
Joined: Fri Sep 26, 2003 11:15 pm

RE: Error 99

Sat Apr 24, 2004 2:32 pm

Good luck Simon,

Possibly see you around mate  Big thumbs up

(MSN Ain't working, Im just leaving  Big grin)

See ya J or +447751242989
Posts: 96
Joined: Wed Sep 12, 2001 10:26 pm

RE: Error 99

Sat Apr 24, 2004 10:56 pm

I had the Error 99 problem on my 300D when I first bought it and borrowed an old 75-300 Canon lens from a friend just to try. Sometimes it worked, sometimes it didn't. I believe it was that the brass contacts on the lens were quite worn/dirty and sometimes just by removing the lens and cleaning the contacts fixed it. But certainly not 100% reliable.

I have heard from various people that it can also occur when using a non Canon lens ie Sigma etc which may have to be re-chipped to make it compatible.

In the end I went and bought a brand new Canon 75-300IS and no problems at all since.

Hope this helps

Ian Haskell

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