what does it means?

[ang79]

hi guys

12-24mm f/4.5-5.6 EX DG HSM
17-70mm f/2.8-4.5 DC Macro
18-50mm f/2.8 EX DC

i dun understand the term for all this.... - EX DG HSM.....DC
MACRO....EX DC.....?

what does it means?

thanks

[xeonic]

www.sigmaphoto.com/popup.asp

I think this will explain everything..

[USM]

Yo Mr Ang, too lazy to search through the Internet?

Anyway, since a link was provided to you, and I guess that you should have read it, so I shall not go into the definitions, etc. Instead, I would like to highlight certain things that you might be interested in.

1) HSM - Sigma's technology, the Hyper Sonic Motor, which is equavalent to Canon's USM and Nikon SWM technology.

2) EX - Sigma's marketing gimmick name given to the exterior finishing of the lenses. Sigma lenses are well-known that the exterior paint of the lens will peel off over time. I guess that "EX" is of no different. However, I heard that latest batches of Sigma lenses have better QC on the exterior finishing.

3) DG - another marketing name for Sigma large aperture lenses

4) DC - equavalent to Canon EF-S and Nikon DX lenses, i.e. they cannot be used on FF bodies.

[ang79]

usm said:

Yo Mr Ang, too lazy to search through the Internet?

hehe ....never tot of that.... juz happen to look at the lens prices den pop this question....but still...i am quite a lazy person ;D

[ang79]

xeonic said:

www.sigmaphoto.com/popup.asp

I think this will explain everything..

thanks a million!

[ang79]

usm bro,

thanks
for the answer and the cs photoshop class!

thanks!!