I recently purchased a Canon Digital Rebel (300D) and want to use my Quantaray 28-200mm (3.5-5.6) Aspherical IF lens that I had been using on my Canon Rebel film camera. I get an error 99 message under strong or direct sunlight conditions. Low light, indoors, or flash conditions I have no problems. I have a Sigma 21-35mm (3.5-4.2) lens which gives me the same problems. I thought it must be the camera, but the Canon lens, 28-80mm, works just fine. I have tried new batteries, new cf cards, formatting the cards, leaving out the battery and card for 20 minutes, no help. Both lens focus correctly, but as soon as the shutter button is pushed, error 99 appears. I then pull out the battery for at least 20 seconds for this to clear. I can't get either lens to capture a picture in direct sunlight. Any advice would be appreciated. Thanks, Jim.
I have a XTi and a Quantaray 70-300mm 1:4-5.6 macro that put up the same error 99.
By mounting the lens with a small piece of thin plastic garbage bag masking the electronic contacts you will find the lens can be used manually. Pictures can be taken continuously with out dismounting lens. I can't set aperture. (F00) ie no lens but can do other stuff .
I have a 100-300mm Quantaray lense and have the exact same issue. I spoke to Canon about this and they suggested cleaning the contacts. That helps for 1 picture. You would have to remove the lense and rub the contacts between each picture. Not a good plan. They suggested the Quantaray may have a fix or repair for the lense and to contact them. However they have no listed 800 number nor any website. only other suggestion is to contact a camera shop and see if they can service the lense. Only other option is to replace it.
Canon built their new Digital cameras so that osome older non Canon lens won't work properly with them. I have a Quantary 70 - 300 f/4 - 5.6 that I used on my Rebel film camera, I bought the Canon 350D and ... You guessed right I got the same error code as you did. I palyed around with it untill I figured ou the problem - You must shoot with the apature open all the way. Move the knob to AV and open the apature as wide as you can - You'll notice you can now take pictures. The lens is somewhat crippled now (only wide apatures) but at least you now have control and understanding of the error code. Hope you find this usefull. J.
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