Sigma 10-20 for Canon 450D

[SeeFarr]

Im on the verge of buying myself the Sigma 10-20 lens for my Canon 450D and i just wanted to clarify which one of the two i should be buying

is it...

Sigma 10-20mm f/4-5.6 EX DC HSM (Canon AF)

or..

Sigma 10-20mm f3.5 EX DC HSM Lens - Canon EF-S

Sorry if this question has been asked before (or am i the only one daft enough not to know).
Thanks in advance for your help.

 

[Mike Jackson]

I've got the f/4-5.6 version and am more than happy with that. I've also read reports that it's sharper than the f/3.5 version but having not tried the 3.5 I couldn't confirm that.

I can't see the benefit of a wider aperture in this sort of lens so I would go for the cheaper f/4 version.

 

[SeeFarr]

oh right, so whats the difference between these then?

Sigma 10-20mm f/4-5.6 EX DC HSM (Canon AF)

Sigma 10-20mm f3.5 EX DC HSM Lens - Canon EF-S

 

[mithrandir]

From my understanding the f/3.5 is HSM as well as f3.5 across the focal range, whereas the f/4-5.6 is at lower stops (and not HSM?)

 

[TCR4x4]

Both are HSM. One has a fixed aperture of 3.5 across the range, the other doesn't. Reports all say the fixed aperture one is slightly softer, so I'd go for the older one.
Both are EF-S it's just the way they have listed them,

 

[troutfisher]

I have had the older one for about 3 years with no problems.I,ve used it for interiors and landscapes where its usually stopped down to f6.3 or greater.So I never had the need for a constant aperture.
Save your money and get the older one.

 

[big soft moose]

oh right, so whats the difference between these then?

Sigma 10-20mm f/4-5.6 EX DC HSM (Canon AF)

Sigma 10-20mm f3.5 EX DC HSM Lens - Canon EF-S

the actual difference between the emboldened bit is that canon EF lenses will fit on any eos body SLR and any of their DSLR series - EF-S lenses on the other hand will only fit on DSLRs that have an EF-S lens mount (basically those with 1.6 cropped sensors) so not the 1D, 1DS, or 5D series

 

[TCR4x4]

the actual difference between the emboldened bit is that canon EF lenses will fit on any eos body SLR and any of their DSLR series - EF-S lenses on the other hand will only fit on DSLRs that have an EF-S lens mount (basically those with 1.6 cropped sensors) so not the 1D, 1DS, or 5D series

Thats correct, but both these lenses are EF-S, the shop you copied the title from has just listed them differently.

 

[big soft moose]

Thats correct, but both these lenses are EF-S, the shop the OP copied the title from has just listed them differently.

doh - I've got one as well :bang:

 

[SeeFarr]

Thanks for the help folks. Looks like I'll be going for the older one then and save myself a bit of money.