Question about Canon Digital Rebel / EOS-300D Digital Camera with EF-S 18-55mm Lens

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Error 99 in my Canon 300D

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?

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  • Anonymous Mar 24, 2014

    I have a new Nikon DSLR D3100 and would like to use an old Tamron 80-210mm CF tele macro lens with it, if at all possible. I know certain SLR lenses can be used with DSLRs and I am prepared to experiment with different settings. Do you think this combination will work and can you tell me what adapter I will need to buy?



3 Answers

Tamron repaired the lens under warranty terms. It worked fine after the repair.

Posted on Jul 30, 2007

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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.

Posted on Jul 29, 2007

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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.

Posted on Nov 27, 2006

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Error 99 with a Canon 300D (original rebel) and Tamron XR Di II 18 to 200 mm lens. Occurs when lens is zoomed out. Does not happen with other lenses (Canon 18-55 kit, Canon 75-300). Cleaning contacts on...

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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:
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First 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 faulty.

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 shooting.

If the error still shows up, you need to take the lens to an authorized service center.

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Hey shutterbug72,
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