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  Reviews by: soren  

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Sigma 12-24mm f4.5-5.6 EX DG Aspherical HSM

Review Date: Nov 3, 2005 Recommend? yes | Price paid: $550.00 | Rating: 7 

Pros: Really wide even on a 1.3 camera, focuses well, price, can be sharp
4.5-5.6 is a bit slow, would be nice to be able to use regular filters

I use a 1.3 crop 1D MarkII, the edges are pretty good at all apetures, and 12mm is wide! It takes a lot of getting used to to handle what 12 mm gets you. I am a bit undecided about the lens because I also own the 14 and 15 fish and it is sharper at all apetures, do I need the 12...? Only time will tell, it is really fun to shoot landscapes with, and sharpens nicely in PS.

Sigma 24-70mm f2.8 EX Aspherical DG DF

Review Date: Oct 31, 2005 Recommend? yes | Price paid: Not Indicated | Rating: 9 

Pros: fast accurate focus, sharp images, good range, well built.. What can I say, my favorite lens.
audible focus sounds, back focuses with 20 D when used with a 550EX flash and the autofocus assist light fires.. (all sigma zooms, do this to me)

I am a Sigma fan, and it is probably this lens that made me this way. I must say this is the best lens investment I ever made.

I also own (owned, just sold) the Canon 24-70 (2.8 L) and found focus speed similar, and accuracy better on the Sigma. I also had back focus issues with the Canon on my 1D Mark II but none with my Sigma.

I have dropped the lens and made the right side of the image go out of focus, but this was fixed by Sigma.

It is noisier than the Canon and not as sharp at the corners of the image, but the center always seems sharper than the Canon. I have also seen Canon 24-70's that had very wierd corners.

Quality control at Sigma and Canon seem to be lacking, I did buy a 24-70 that was awful, so if you buy this lens, take a picture of a newspaper at several focal lengths to see if it is a good one, if not send it back and get one as good as mine.

I have shot the majority of several hundred weddings with this lens

Sigma 28-70mm F2.8 EX Aspherical

Review Date: Oct 31, 2005 Recommend? yes | Price paid: Not Indicated | Rating: 7 

Pros: Great sharp images stopped down a little, Focus accuracy and speed.
28 is not wide enough for a 1.3 or 1.6 crop digital camera. Softish at 2.8, although it has a quality there... Build could be better (mine broke)

This was my first Sigma lens for Canon EOS, and I loved it (since replaced with the Sigma 24-70) A little soft wide open but usable, and a nice softness that I didn't mind. It was sharper than my 24-70 after f4, and also sharper than my canon 24-70 (2.8) when stopped down.

Autofous worked well and fast with D-30, and D-60, 1D, and 1D-II.

It did stop auto focusing once and had to be sent in.. some screw had obviously fallen out, there was a metalic rattling inside.

I still own, it but use the 24-70 because i like the range better, it is amazing what that extra 4mm makes. The 24-70 focuses more quietly as well.

like all Sigma Zooms I've tried, it will extemely back focus on the 20D if used with a Canon Flash (550 or 420) and the red auto focus beam fires.

Sigma 17-35mm f2.8-4 EX Aspherical

Review Date: Oct 31, 2005 Recommend? no | Price paid: Not Indicated | Rating: 1 

Pros: Great range for digital cameras with crop factors.... That is it.
Breaks easily, not sharp, noisy auto focus.

This is the only complete DUD lens I have ever purchased. I actually sent it back and got another and there was no improvement. I used it verry little hoping I could figure out some sort of sweet spot, but I never managed to, maybe because it broke and was repaired, and then broke again... I am a Sigma fan, and I am lucky I didn't get soured on them from using this lens.