Sigma 17-70mm f2.8 and Sigma 24-70 f2.8

[Gary.D]

What are your views on these two lens.
And why is the 24-70 so much more expensive even though the 17-70 covers a wider range.
Thanks

 

[puddleduck]

Well.. for a start the Sigma 17-70 isn't an f/2.8 lens - in fact its only f/2.8 at 17mm, and increases up to f/4.5 at 70mm. Its for crop cameras. Optically its excellent.

The Sigma 24-70 is a constant aperture full frame lens, which is why its more expensive.

 

[sdb123]

Because the 17-70mm is f/2.8 - f4 whereas the 24-70mm is f/2.8 through the range.

 

[Matblack]

I'm very happy with my 17-70 and it does give good flexibilty

Taken today

40mm f6.3 1/2000 ISO400

70mm f6.3 1/3200 ISO400

17mm f6.3 1/2500 ISO400

MB

 

[LiMPiNg]

I love my Sigma 17-70 f2.8-4.5 as well. It is a very good upgrade from the kit lens for the 400D.

 

[huanjia]

24-70/2.8 is a constant 2.8 for full frame. 17-70 is 2.8-4.5 for aps-c only, although you can use it on full frame after 35 I think

 

[Gary.D]

Can you only use the 24-70 on a full frame camera?

 

[pearce_jj]

no

 

[Gary.D]

no

Ok so I could use it on a 400d 40d or a 5d?

 

[pearce_jj]

indeed!