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Old Oct 30, 2007, 12:26 PM   #1
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Hi,

I am looking to buy one of these lenses: Canon 17-55/2.8 IS or Tamron 17-50/2.8 or Sigma 18-50/2.8 HSM to go with my 30D. I take lot of people, group pictures with and without flash. Looking for a very sharp lens with fast/precise focusing in low light as well. Thanks.
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Old Oct 30, 2007, 1:38 PM   #2
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The Sigma 18-50/2.8 is not HSM in Canon mount!!!
http://www.sigmaphoto.com/lenses/len...mp;navigator=6
"HSM (Hyper Sonic Motor) for Nikon Mounts Only
The Incorporation of HSM is capable of autofocusing with all Nikon DSLR cameras."
-> The Tamron is then probably the next best deal but if you need USM or IS then pay for the Canon...

BTW group pictures need large DOF so I don't know if f/2.8 will cut it for you... If you have to use flash to get the DOF then neither f/2.8 nor IS is any longer required

PS There's only one new all metal super high quality Tokina, but it's MTF is in Nikon mount so I can't tell if this higher number is actually reflected in Canon's or not: http://www.photozone.de/8Reviews/len...ikon/index.htm
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Old Oct 30, 2007, 4:52 PM   #3
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NHL wrote:
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-> The Tamron is then probably the next best deal but if you need USM or IS then pay for the Canon...

BTW group pictures need large DOF so I don't know if f/2.8 will cut it for you... If you have to use flash to get the DOF then neither f/2.8 nor IS is any longer required
It is a shame that Canon version is not HSM for Sigma lens.

I am not sure ifI need IS or HSM but low light performance is needed. That's whyI am looking at f/2.8 lenses.Fast low-light focus will be good too.

Has anyone compared Tamron and Canon lenses?
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Old Oct 30, 2007, 9:23 PM   #4
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If money is no object, go for the Canon 17-55mm IS. The Tamron gives good results for the lower price.


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Old Oct 31, 2007, 12:24 AM   #5
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dr_spock wrote:
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If money is no object, go for the Canon 17-55mm IS. The Tamron gives good results for the lower price.
What do I gain with extra money spent on Canon 17-55mm f/2.8 IS? I read at some board that Canon 17-55mm IS has dust problem too..:? How to sort out these concerns?

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Old Oct 31, 2007, 2:49 AM   #6
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http://www.photozone.de compares lenses, and also my favourite lens review site slrgear.

Tamron review:

http://www.slrgear.com/reviews/showp...uct/355/cat/23


Canon review:

http://www.slrgear.com/reviews/showp...uct/353/cat/11

The Canon has only very slightly better image quality, but it has faster AF and IS.

Don't worry about dust, there is likely no difference between the lenses in that regard.

Don't forget to click on the "Blur Index" graph on the reviews, it shows how sharp the lens is across the frame at different apertures and focal lengths. A fabulous feature IMO.
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Old Oct 31, 2007, 7:08 PM   #7
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peripatetic wrote:
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http://www.photozone.de compares lenses, and also my favourite lens review site slrgear.

Tamron review:

http://www.slrgear.com/reviews/showp...uct/355/cat/23


Canon review:

http://www.slrgear.com/reviews/showp...uct/353/cat/11

The Canon has only very slightly better image quality, but it has faster AF and IS.

Don't worry about dust, there is likely no difference between the lenses in that regard.

Don't forget to click on the "Blur Index" graph on the reviews, it shows how sharp the lens is across the frame at different apertures and focal lengths. A fabulous feature IMO.
I loved the "Blur Index" graph! thanks!

I could not find any comparison of lensesat Photozonesite. MaybeI was not looking in the right places.

Read the slrgrear reviews. They were helpful but I am not sure which way to go yet. One complicating thing is that I would have to sell my current Sigma 17-70 lens too and not sure how much I can sell it for?:?
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Old Nov 1, 2007, 2:59 AM   #8
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The Sigma 17-70 is a pretty good lens.

Don't be too disappointed if your new one gives only very marginal improvement under most conditions.
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Old Nov 1, 2007, 8:38 AM   #9
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IMO a better lighting - i.e. flash(s) makes a much bigger difference than any lenses... especially in the contrast/saturation department .

Did you guys know that Nikon flash comes with a filter (as standard) to match the incandescent lighting?
-> Didn't see one in any of my 550 or 580EX'es...

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Old Nov 1, 2007, 9:47 AM   #10
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NHL wrote:
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Did you guys know that Nikon flash comes with a filter (as standard) to match the incandescent lighting?
-> Didn't see one in any of my 550 or 580EX'es...
I've been wondering if this would be a good way to approach it (cheap diffuser with an orange dome versus filters and gels). This one would fit your Canon flash models.

http://www.gadgetinfinity.com/produc...273&page=1

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