preference la. i like the Sigma's feel. hehe. of course i don't buy because of the feel la but it's still nice.

nikkor 17-50 f2.8 sharp... but cost around RM 3K... almost double the price of the tammy

that is why some people will prefer to get a 3rd party lens instead of that...

but if stick to the topic, is it only because Tamron has constant f/2.8 in between 17-50mm? anything else?

how much does the Tammy cost?

rm1.5k or less.

a constant 2.8 is one hell of an advantage d and it's prolly sharper than the mentioned sigma lens

1 mm makes alot of differences for men of course

Dude where do you get the Nikkor 17-55mm f/2.8 lens for RM3k man? So cheap!

Most of them I see brand new even at YL Camera is around RM5k while the 2nd hand ones are around RM4.2k

We ask him Bulk la... then we all buy... come come...

i think i have mistaken that with the canon 17-55 f2.8 IS sorry this one second hand RM3K - RM3.5K

as for me ah... two lenses in mind. one is 17~85mm F4~5.6 IS, and maybe 17~40mm f4 L gua.. cause both lens also not bad and is around the my price range.

17~85mm
pros: wider range of focal length, IS, Build of lens is good. permanent lense length(when zooming lense's length is still the same), solid touch.

cons: no hood comes along when purchase, 17mm have barrel distortion, very sharp but not super sharp like L lens. LOL.

17-40mm L
pros: it's a L lens LOLs, less barrel distortion at 17mm, EF lense can be used in full frame body in future, super sharp.

cons: short range of focal length lor, no IS.

Grr.....

the 17-85 does extend when zooming, I got that lens, unless there's a another ef-s 17-85mm f/4-5.6 IS USM lens

if you look for reviews, the Tamron above is sharp .... while the Sigma above is not sharp

just now tested the Tamron's one, kinda sharp as yuo mentioned...

Tamron 17-50mm vs Sigma 18-50mm Macro.

Found this on a Taiwan forum, this is the english translate version:
http://209.85.135.104/translate_c?hl=en&la...tamronsigma.htm

Original source:
http://www.mobile01.com/topicdetail.php?f=248&t=259497

i've been testing this 2 lens just now and finally i bought the tamron..picture were sharp! trust me, u wont regret a thing ! haha

tamron cheaper and constant aperture ..

where u got it ?

bought at sungei wang fotokem..near the front entrance there..sure u know one la..

below are my summary after playing with them for quite some while ago.

Sickma focus real fast but does not guarantee pristine image quality, tammy in the other hand, offers quality instead of focusing performances.

Nikon offers both at the cost of 3 times more expensive. Canon offers an over priced lens at this FL range.

somehow, I only hear Nikon users said it is sharp and not Canon... Because so far I am using it as my main lens, but, I don't think it is really sharp enough like a lot of people saying how sharp it is and etc etc...

Can any Canon user clarify this? For me, it is not sharp, but soft...

Reading the topic's title my first thought was.... "When in the world did Sigma release a 17-70mm f2.8 constant aperture lens"

The second thought was "How come I haven't heard of it"

The answer is plain for me at least : Tammy 17-50mm f2.8 for the constant aperture.