I have had my camera for almost two years now. I have also used a Tamron 70-300 AF Tele-macro lense for about a year. A few days ago I started getting error 99 when using this lens. I believe the problem is the lens but I am not sure. If the lens is used at tis maximum apperture the problem does not occur. I have read about solutions such as cleaning the electrical contacts, taking the camera battery off, taking pictures without a lense on but the problem still pops-up. Anyone with experience with this issue?
I had the same problem with an older non-canon (I think it was a Tamron as well) tele-photo lens. IT would take some photos, but some would cause an error on the camera. The problem is with the lens and the reason might be it is an older lens and is not 100% compatible for the 300D camera. If it is an older lens, you can try calling Tamron and see if they can rechip it which should make it compatible with the camera.
Here is a forum post with someone with the same problem. They had the problem when shooting the sky in broad daylight...the reason they had the problem when doing that might have been because it closed the aperture down small and that is what caused it. Scroll to the bottom and read forest5000's comment.
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You're probably right about the lens. Tamron lenses have a flexible circuit that drives the aperture blades. The aperture might need to be cleaned or the flex might be worn out. Either case needs a repair shop to correct.
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I checked the Tamron website menu of manuals and one is not listed. This is a pass-thru device, so other than placing it between your lens and camera body, there should be no additional settings. Your camera focus and exposure is thru the lens so the camera should adjust seemlessly. Please tell us what the problem is, what lenses and body you are using.
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Err 99 could mean several different things, such as... Memory Card, Lens or Lens contacts.... Here's what you can try: Remove the memory card an enable "shooting with out memory card" and see if you still get the error. If it works your memory card is bad.Try another lens if you can. Clean the lens contacts with a pencil eraser (be careful not to get eraser dust in the camera body or in the lens). Worst case scenario is, Err 99 could be related to the shutter failing which would mean a trip to Canon. Thank you for using Fixya!
99' indicates some problem with the AF contacts. This is a common error
in Canon lenses. It could indicate a very simple problem like dirty
contacts or a much serious one like the breakage of USM cable. Alternately, it can also be a card error or camera error.
remove the lens, battery and card and leave the camera like that for
about 30 min. After that, insert a fully charged battery and switch on
the camera. If the error still shows up, it is a fault with the camera
and has to be serviced.
If not, turn the camera off and insert the card. Format the card in the
camera and depress the shutter button. If it shows an error, the card is
If not, try cleaning the lens and body contacts (the metal
contacts between the lens and body) using a pencil eraser. Be careful to
hold the body facing down so that no dust falls inside. After cleaning
both the lens and the body contacts, re-attach the lens and try
If the error still shows up, you need to take the lens to an
authorized service center.
Hey shutterbug72, According to the manufacturer the first thing you should try is cleaning the lens contacts with an eraser. If that doesn't work you could try removing the battery and reinserting it to reset the camera. It seems to me that if there was a compatibility issue going on you should have seen that from the start. As far as what lens you should buy both Tamron and Canon make very good lenses, but with Canon lenses you shouldn't ever have compatibility issues. I hope this helps! Sincerely, Allan Go Ahead. Use Us.