Question about Quantaray AF 70-300mm f/4.0-5.6 High Speed Auto Focus Zoom for Minolta

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Canon rebel xt error messages

I have a canon digital rebel xt camera. For 3 months, I've been getting error 99 messages everytime I use the camera. It is about 2 years old. I thought it was the battery so I would try to reset the battery even after buying a new one. I took the lense (quantaray 70-300) off and replaced it. This seems to reset the camera. Why is this happening?

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  • wgatwood Oct 06, 2008

    Exact same problem here... lens works perfectly on my Canon Rebel film camera but gives a 99 error on my Canon Digital XTi...

    Sold me on the camera that would work with all my Canon Rebel lenses... I am not too happy with them now....

  • Anonymous Oct 18, 2008

    Yes, I have the same problem. Contact Quantaray, they will re-program the software.

  • Anonymous Oct 27, 2008

    I have the same problem.Do you have the phone number you called?

  • Gallottl Oct 27, 2008

    I have the same problem, can you please give me a contact number for Quantaray.

  • jhess77 Nov 13, 2008

    Same thing here...err99...errrrrrr. Quantaray support online just tells me the lens "should work". Where can I go to get the software reprogrammed?

  • mannajophoto Nov 24, 2008

    I just got the Canon XTsi digital and I'm having the same problem with the lens. I went to a Ritz and was told they couldn't do anything.

    HN Trent USA


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I am actually shocked that no one brings up the err99 problem we collectors have had with these lenses for years. O.K. here goes.

Canon does not make their system/lens specs available to 3rd party lens manufacturers. Don't get angry or incensed, that is just their decision and the way it is.

So manufacturers (in this case Sigma) would purchase Canon AF lenses (in this case film camera lenses,) dissect them and backwards engineer them so that their lenses would operate with Canon auto focus cameras.

Now enter Canon's digital SLRs, and a small increase in the lens/body requirements make the film AF lenses made by third parties just give the end-user fits! In some cases the camera has to go back to Canon for servicing (of course using the third party lenses on your digital Canon voids the warranty!)

Early on Sigma and another AF lens manufacturer would refit their film AF lenses for Canon's digital AF bodies but I have heard that that is no longer the case (at least with Sigma.)

If you have a non-Canon lens made for Auto Focus film EF mounts, please do not attempt to use them on a Cannon digital camera.

If you have already done so please power down the camera (if you can,) remove the battery and then the lens and after a period of time, reinsert the battery with a Canon lens affixed (if the camera does not operate correctly, you'll have to return it to a Canon repair facility, you can find one close to you on the Internet.)

Your Sigma/Quantary lens will work fine with a Canon AF film camera, so you might recover some of your losses by selling the used lens on eBay. But please be honest and admit that the lens is for a film Canon EF mount and cannot be used with a digital Canon EF mount SLR!

Thanks and sorry to be the bearer of bad news!

Posted on Apr 08, 2009

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I have the same problem. So far I've contacted Sigma (I believe this is the company that manufacturers the Quantaray lens for Ritz) and they requested I send them a photo of the lens. I just googled sigma lens to find sigma support. I will update you all with any response I may get.

Posted on Nov 14, 2008

  • jhess77 Nov 14, 2008

    The official word from Sigma is that the lens is too old and they do not have a fix for it. They offered me to trade mine in for a deal on newer lenses that will work, but the price they offered me for the trade in were pretty much what you could get the same thing on for.


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SOURCE: canon rebel xt error messages

error 99 can most times be remedied by taking a standard pencil eraser and carefully cleaning the gold contacts at the back of the lens and the gold maching contacts in the lens opening of the camera... BE CAREFUL not to let eraser crumbs into your camera... keep it clean... reset the battery and give it a whirl.... did it solve the 99 issue?
for the CF it refers to the cf card... here's what I've found on this:
Canon reports that this error code may appear on your digital camera’s LCD (liquid-crystal display) when there is an error reading from or writing to the inserted CF (CompactFlash) card. This error code occurs most often after a user has tried to eject a CF card before the camera has finished writing data to the card.Solution:
Canon suggests that you first try to use a different CF card. If you do not see the error message when you use the new CF card, the first card is probably damaged.

Before you take the next step, drag the files from the CF card to a location on your hard drive to back up the files. Next, you can use Windows’ ScanDisk utility to check the CF card for errors. If you use a Mac, you can use Disk Utility (in Applications\Utilities\) in OS X.

If ScanDisk or Disk Utility fails to resolve the CF card problem, insert the CF card in your camera again. Then format the CF card. On most Canon cameras, you can do this by pressing the Menu button, selecting the Format tab, highlighting Format, selecting Format, and choosing Yes. Make sure you have backed up the data on the card before you do this. Formatting the card will delete the images from the card. After you format the card in your camera, use ScanDisk or Disk Utility to check the CF card again. If you still encounter errors while using ScanDisk or Disk Utility, you should discard the CF card because it is damaged.

If the error still occurs after following the steps above, your camera may need repair. Contact Canon’s technical support for further assistance.

hope this solves your issues....
let me know

Posted on May 29, 2009

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There are quite a few discussions about this on the net.
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Try the following diagnosis steps, in this exact order. This will isolate the cause of the issue: -
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4. Insert only a fully charged battery, and turn on the camera.
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Does the “ERR 99" message appear? If so, the camera may be faulty and requires a service. If it does not, then: -
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If the “ERR 99" message only appears when one particular lens is attached, then that lens should be examined by a service technician.
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