Err 99

[GTogs]

How common is the Err 99 on the 20D? I realize it is a catch all code.

I just had it happen for the first time today. Missed a couple of great shots before I realized what happened! Fortunately just some nature shots.

[FlyingPete]

Not really sure.

Some people have it as a weekly event, others like myself have never had it (10000 shots, no issues).

I posted a thread a couple of weeks ago to try and determine what the common factor was. I a nut shell there didn't seem to be one, however three things did seem to make them more likely. The first was non-canon lenses and flashes, the second is dirty lens contacts, and thirdly a Battery Grip with contact issues.

Hope this is of some help

[GTogs]

I was using a Tamron 2x TC with a EF 70-200 f/4L. This combo gives me autofocus, I hope it doesn't happen all the time!

[FlyingPete]

I was using a Tamron 2x TC with a EF 70-200 f/4L. This combo gives me autofocus, I hope it doesn't happen all the time!

A TC is supposed to be a straight though connection, as there is no control of the optice required, could be contacts though, twice as likely to be an issue!

[Simon Spiers]

I got it once when i tried a second hand sigma zoom on my 20d. The camera refused to work with the lens at all.

[johnlo]

Was on a wedding shot this weekend (travelling out of town). Pop in my Sigma fisheye lense and my 20D gave me the Err 99. I remember that lense do work with the 20D when I first got the camera..... very weird. I didnt bother wondering or thinking why since I was on assignment.

[FlyingPete]

Was on a wedding shot this weekend (travelling out of town). Pop in my Sigma fisheye lense and my 20D gave me the Err 99. I remember that lense do work with the 20D when I first got the camera..... very weird. I didnt bother wondering or thinking why since I was on assignment.

Have you tried cleaning the contacts?

BTW are all the contacts on all lenses/cameras gold plated? I know of issues of having different metal types in contacts under certain conditions.

[cruzyn56]

How common is the Err 99 on the 20D? I realize it is a catch all code.

I just had it happen for the first time today. Missed a couple of great shots before I realized what happened! Fortunately just some nature shots.
Just had it happen today for the first time.. A little over 2000 shots and it was with the 18-55 kit lens. Powered off and back on. The camera sounded like it took the shot but I never saw the image in the LCD. That's when I discovered the err99. The previous shot a few seconds before was fine.

I wonder if it could have anything to do with handling or humidity as well as non-canon lens?

[johnlo]

Have you tried cleaning the contacts?

No I have not. and I have Never clean the contact before..... How do you go about cleaning it???

[FlyingPete]

No I have not. and I have Never clean the contact before..... How do you go about cleaning it???

I would try a dry cotton bud first, failing that a tiny bit of Isopropal Alcohol (like what was used to clean tape heads) on the bud (don't spash it onto the cotnacts :eek: ). Be very careful with them, do use anything harsh or abarasive on them, they will be hard/expensive to repair.

[C.S.I.]

No I have not. and I have Never clean the contact before..... How do you go about cleaning it???


Very gently take a pencil eraser and dab the contacts. So gentle that no fragments come off the eraser.


Didnt realize post was so old.....Bleeeeargh

[christopherpm]

Just to throw something else into the mix here, I've had this happen with a Seagate Microdrive installed in my 20D. I reformatted it and then it was ok...

[drews578]

This happened on my 10D, I sent it to canon, they ended up replacing my shutter (under warranty)

[b1gdaddy]

Happens to me ( but not always!? ) when i use a sigma 70-200 lens in manual mode on 350d ...... always ok in auto, but i never use auto.