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Error 99  
User currently offlineAirplanepics From United Kingdom, joined Jun 2003, 2748 posts, RR: 37
Posted (12 years 1 week 1 day ago) and read 2043 times:

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 - London-Aviation.com
8 replies: All unread, jump to last
User currently offlinePepef From Finland, joined Oct 2002, 440 posts, RR: 8
Reply 1, posted (12 years 1 week 1 day ago) and read 1999 times:

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-

User currently offlineMikephotos From United States of America, joined Oct 2000, 2923 posts, RR: 52
Reply 2, posted (12 years 1 week 1 day ago) and read 1995 times:

From the Canon Manual, pg. 35 paragraph 2:

Error 99 : You should have purchased a Nikon instead


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


User currently offlineAirplanepics From United Kingdom, joined Jun 2003, 2748 posts, RR: 37
Reply 3, posted (12 years 1 week 1 day ago) and read 1985 times:

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 - London-Aviation.com
User currently offlineMx330 From Mexico, joined Oct 2002, 845 posts, RR: 11
Reply 4, posted (12 years 1 week 18 hours ago) and read 1928 times:
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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
User currently offlineDehowie From Australia, joined Feb 2004, 1092 posts, RR: 29
Reply 5, posted (12 years 1 week 14 hours ago) and read 1902 times:

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

User currently offlineAirplanepics From United Kingdom, joined Jun 2003, 2748 posts, RR: 37
Reply 6, posted (12 years 1 week 13 hours ago) and read 1887 times:


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 - London-Aviation.com
User currently offlineJkw777 From , joined Dec 1969, posts, RR:
Reply 7, posted (12 years 1 week 13 hours ago) and read 1884 times:

Good luck Simon,

Possibly see you around mate  Big thumbs up

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

See ya J

User currently offlineHaskey From United Kingdom, joined Sep 2001, 100 posts, RR: 0
Reply 8, posted (12 years 1 week 5 hours ago) and read 1853 times:

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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