How to find out if older Sigma lens is compatible

[MomAndrea]

I have an older Sigma lens and I'm wondering if there is a way to find out if it is compatible with a Canon Rebel XT or XTi.

Thanks

 

[MomAndrea]

Anyone?

 

[AndrewWG]

My only advice is to call Sigma and ask them. That is what I had to do when I first got my Canon 30D. My old lenses were not compatible.

 

[MomAndrea]

Thanks Andy, I'll do that.

 

[rtphokie]

I believe an adapter kit is available from your local hardware store:

 

[deanie]

My sons both have a Canon Rebel XT and they have the 55-200 Sigma lens. The lens is not that old, just a couple of years and it is compatible. I am not sure if that helps though.

 

[MomAndrea]

I believe an adapter kit is available from your local hardware store:

What is that supposed to mean? Was my question really that ridiculous?

Thanks to everyone who replied with useful information, it was appreciated.

 

[webshark3]

From http://photonotes.org/articles/beginner-faq/lenses.html

I don't know if the list is exhaustive, but it might be. These lenses need to be re-chipped (i.e. they will not work). But call or email Sigma to make sure. They are VERY responsive.

The following Sigma lenses require upgrading for compatibility with newer EOS cameras, according to Sigma:

24-70mm 3.5-5.6 aspherical UC
28-80mm 3.5-5.6 mini zoom macro aspherical
28-80mm 3.5-5.6 mini zoom macro aspherical HF
28-80mm 3.5-5.6 mini zoom macro II aspherical
28-105mm 2.8-4 aspherical
28-105mm 3.8-5.6 UC-III aspherical IF
28-135mm 3.8-5.6 aspherical IF macro
28-200mm 3.5-5.6 DL aspherical IF hyperzoom macro
28-300mm 3.5-6.3 DL aspherical IF hyperzoom
70-210mm 4-5.6 UC-II
70-300mm 4-5.6 APO macro super
70-300mm 4-5.6 DL macro super
100-300mm 4.5-6.7 DL
135-400mm 4.5-5.6 APO aspherical RF
170-500mm 5-6.3 APO aspherical RF
8mm 4 EX circular fisheye
15mm 2.8 EX diagonal fisheye
24mm 2.8
28mm 1.8 II aspherical
50mm 2.8 EX macro
105mm 2.8 EX macro
300mm 4 APO tele macro
400mm 5.6 APO tele macro
500mm 4.5 APO
500mm 7.2 APO
800mm 5.6 APO
28-70mm 2.8-4 UC
28-105mm 4-5.6 UC
28-105mm 4-5.6 UC-II
70-210mm 3.5-4.5 APO macro
28-200mm 3.8-5.6 aspherical UC

 

[MomAndrea]

Thanks so much, webshark3. Unfortunately my lens is on that list .

 

[webshark3]

Contact Sigma, they used to do the re-chips free of charge. Could still be the case...

History; in case you don't know: Sigma doesn't "license" the lens technology from Canon. Hence it's cheaper. They design the lenses by reverse-engineering Canon's technology. They still sell you "100%" compatible EOS lenses (as far as they know). But Canon can make a ever so slight alterations to bodies that could affect 3rd party "EOS" lenses.

So it's in Sigma's best interest to do everything possible to keep their older "EOS" lenses compatible (free rechips) or else drive away potential return customers.

 

[rtphokie]

What is that supposed to mean? Was my question really that ridiculous?

Thanks to everyone who replied with useful information, it was appreciated.

No it wasn't ridiculous at all. Just a little joke. My sigma 80-200 fits but it's the sloppiest fit of my lenses ( the rest are Canons )