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Old Dec 6, 2006, 8:36 AM   #1
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Hi guys, I haven't found much commentary about canon vs non-canon lenses except of course ".... is a great lens and costs less". Am I sacraficing anything going with sigma or tamron? Does it not interact with the camera as well? Can my 30d still control the apeture and such?

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Old Dec 6, 2006, 9:17 AM   #2
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This is an ongoing debate. 3rd party lens makers must reverse-engineer the communication with the Canon bodies - canon will not provide the protocols. There is always a risk that Canon will find a way in future bodies that will cause problems with 3rd party lenses. Typically when this happens you hear about people needing to re-chip their lenses - the mechanics haven't changed but the 3rd party manufacturers must change the communications protocols.

My personal feeling is that they will continue to do so for their pro line lenses where they know people are spending big $$$ and are the audience they want to be repeat buyers. For a $100 lens? Maybe they won't rechip.

It's unlikely Canon will change the entire mount again like they did in the 80s - that caused quite a stir.

That's my take on it - I own both Canon L lenses and Sigma EX lenses. I feel comfortable that Sigma will rechip the EX lenses in the future if Canon figures out a way to cause them problems.
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Old Dec 7, 2006, 4:58 PM   #3
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I have both Canon and Sigma lenses also. Sigma has re-chipped in the past, usually for free too. With all of Canon's recent additions to their lens lineup, I too doubt they will change the mount anytime soon.Canon also realizes how smart the compitition is too, and know thatwhat ever changes they make it is only a matter of time before the 3rd party makers have it figured out. I don't really see Canon going to the expense of changing too much just for the sake of throwing off theotherlens makers for just afew months.Now for the quality, the Sigma EX lenses are pretty much on par with the Canon L lenses, there are those that will argue that, but I own both and the build quality and image quality are pretty equal.
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Old Dec 8, 2006, 11:12 AM   #4
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What about features? Do Canon lenses have more camera controllable funtion than non-canon?
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Old Dec 8, 2006, 12:59 PM   #5
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shawn.cook wrote:
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What about features? Do Canon lenses have more camera controllable funtion than non-canon?
No, but Canon does have Image Stablization lenses, although that is not a camera controlled feature. Sigma offers only one lens at this time with optical stablization. As far as any camera controlled features though there are no more or less with the 3rd party lenses.
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Old Dec 8, 2006, 1:28 PM   #6
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Most third party lenses will work fine.

The exception is usually that some older Sigmas can sometimes have issues (won't AF, etc.), and that goes for some older Sigma lenses in Canon, Nikon, Konica Minolta and Pentax mounts, too.

But, Sigma will usually rechip an EX Series lens if they missed something when reverse engineering the camera manufacturer's protocol (the way the camera communicates with the lens), if the camera manufacturer implements a previously unused lens feature in a newer body that Sigma missed.

Older, Non-EX series Sigma lenses carry a higher risk. You're taking your chances (Sigma may not be able to, or want to, rechip them if you get one with a compatiblity issue).

Most older AF lenses from Tamron, Tokina and even Vivitar/Phoenix/Cosina are fully compatible (with very few exceptions) with most camera brands, as long as you get one with the correct lens mount.

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Old Dec 10, 2006, 7:52 AM   #7
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There was a link on the Sigma site, but you can email Sigma... for this info:
Problematic lenses are older (or used) lenses made before the year 2000. There was never a problem with the EX's since this series was introduced after 2000, and most with HSM drives. Beside the EX's carry a 4-year USA warranty!

BTW for the do-it-yourselfer regarding proprietary IP: :-)
http://www.birger.com/Merchant2/merc...een=ef232_home
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Old Dec 10, 2006, 2:04 PM   #8
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its quite true that sigma dosn't want to have anything to do with their consumer lenses once they've sold them. A few months back I picked up a UC II ('99 model) and heard about the chip issues, so I emailed them a very simple query about it, the response I got was this:

Thank you for your inquiry. Unfortunately, there are no parts available for upgrade or repair for your particular lens. It is a discontinued product. We apologize for the inconvenience.


Although it does seem to work fine on my K100D.
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