Canon 300d error 99

[Ballistic Banana]

Keep getting an error 99 when using a Sigma 300mm Lens can figure out why. error 99 just says to remove battery and re insert. All ok on the 55mm and canon 200mm Lens.

Any ideas appreciatted

BB

[Andy M]

I too had this problem with a Sigma lens.

IIRC it needs to be rechipped. I've not bought another...

[GF350]

Some older Sigma lenses don't work on Canon digital cameras, something to do with reverse engineering the software for the AF rather than licencing it from canon. It can be upgraded though.
If it used to be OK and has stopped working, try cleaning the gold contacts on the lens.
some info here.
http://photography-on-the.net/forum/archive/index....

[MonkeyHanger]

Ballistic Banana said:

Keep getting an error 99 when using a Sigma 300mm Lens can figure out why. error 99 just says to remove battery and re insert. All ok on the 55mm and canon 200mm Lens.

Any ideas appreciatted

BB

Which 300 and how old?

If it's a recent lens it's probably dirty contacts. If it's an old one it may need re-chipping if Sigma still have the parts in stock.

Any Sigma lens made in the last 3 years or so won't have that problem.

[VxDuncan]

Sad to say it may not be the lens. I had this with mine and it indicated the shutter failing (around 10,000 shots). Basically Err99 is a catch all code for anything that isn't covered by other codes and could mean anything. You can try removing lens, batteries (inc button if needed) and possibly flash card. That may clear it, but it COULD return. Usually if this doesn't clear it instantly it's something mechanical - bent CF slot pin, lens connection, ripped shutter curtain, snapped mirror support pin etc.

One page I found suggested cleaning the lens connections on the camera body and lens with a plastic eraser. Obviously you need to be VERY careful not to get shavings on the sensor, so it's best done with the body upside down (the camera body that is!) You'd be amazed the dirt on the connections!

Hope this works, I know I did lots of searching and ended up selling it on ebay , labeled as having this intermittent fault (shutter failing), and got about £20 less than one with out the fault. Got sick of canon build quality and have used Nikon ever since. Sorry. 8o(

Best of luck.

Edited to say - I really should have read the posts above. Oops!

Edited by VxDuncan on Monday 6th August 20:43

[b2tus]

When I had a 300D and tried it with my older Sigma 75-300 zoom, I intermittently got the same error code. I was told that the lens was not suitable for use with digital Canons.
Sold it on Fleabay and bought a new Canon zoom....no problems so it was the Sigma.