20D and Sigma 20-40mm f2.8 EX DG DF

Ris Goh · 17th January 2005

Anyone have the above combi or tried it before?

Reviews for the sigma seems pretty good and its f2.8

Ris Goh · 18th January 2005

hmmm....... anyone has this sigma lens but using on other cam?

imaginary_number · 18th January 2005

Not wide enough, not long enough. I think the 18-50 F2.8 is a better choice.

Ris Goh · 18th January 2005

..... but its usable with film cam cos i still holding on to my eos5!

anyway read some problem with the 18-50mm f2.8 with flash AF assist light..... seems to misfocus when using the assist light

some QC issues also

squalle · 18th January 2005

I've got the newer version
which is the 24-70 f2.8 EX DG MAcro
not the DF version

After reading good remarks abt it at dpreview then I bought it
If u wanna try, why not come down during the photoAid charity drive this weekend and I'll let u try

Ris Goh · 19th January 2005

The 20-40mm f2.8 is in a different league compared to the 24-70mm f2.8 though both may seem only 4mm apart at the wide end. thnx for the offer though

squalle · 19th January 2005

Originally Posted by Ris Goh

The 20-40mm f2.8 is in a different league compared to the 24-70mm f2.8 though both may seem only 4mm apart at the wide end. thnx for the offer though

my eyes were playing tricks on me

saw wrongly
deepest apology...

imaginary_number · 19th January 2005

Originally Posted by Ris Goh

..... but its usable with film cam cos i still holding on to my eos5!

anyway read some problem with the 18-50mm f2.8 with flash AF assist light..... seems to misfocus when using the assist light some QC issues also

Yeah, I posted that thread in dpreview. Apparently, it occurs only when specifically used with a 20D and the center AF pt with an ext flash's AF-assist. I think it has an issue with the high precision sensor with the AF beam pattern. Using a non-center (non-high precision) AF point or simply turning off the AF-assist beam avoids this issue. The internal flash "AF-assist" works fine with the lens though.

Aside from that, this lens is sharp and light, and there's no other substitute for it, at least for now. Anyway, I read from dpreview that Sigma is working on a fix for it.

17th January 2005	#1
Ris Goh Member Join Date: Jul 2004 Posts: 750	20D and Sigma 20-40mm f2.8 EX DG DF Anyone have the above combi or tried it before? Reviews for the sigma seems pretty good and its f2.8

18th January 2005	#2
Ris Goh Member Join Date: Jul 2004 Posts: 750	hmmm....... anyone has this sigma lens but using on other cam?

18th January 2005	#3
imaginary_number Senior Member Join Date: Feb 2002 Location: Singapore Posts: 1,895	Not wide enough, not long enough. I think the 18-50 F2.8 is a better choice.

18th January 2005	#5
squalle Member Join Date: Oct 2004 Posts: 182	I've got the newer version which is the 24-70 f2.8 EX DG MAcro not the DF version After reading good remarks abt it at dpreview then I bought it If u wanna try, why not come down during the photoAid charity drive this weekend and I'll let u try

19th January 2005	#6
Ris Goh Member Join Date: Jul 2004 Posts: 750	The 20-40mm f2.8 is in a different league compared to the 24-70mm f2.8 though both may seem only 4mm apart at the wide end. thnx for the offer though