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Sigma 28-70mm f2.8 EX Aspherical DF

28_70df_1_
Review Date: Feb 5, 2007 Recommend? yes | Price paid: $300.00 | Rating: 9 

Pros: Cheap, F2.8, nice zoom range, build quality, 77mm filter thread instead of 82mm :D
Cons:
slightly noisy AF, a little soft wide open, slight vignetting on a full frame 28-35mm, manual focus switch

I paid 150 for this lens, well 129 if you discount the postage and packaging and the UV filter I got with it.
Which is just amazingly good value, it was second hand but came with a 6 month warranty.

Its great, I use it for when switching between primes is a hassle.
it is a little on the soft side when wide open, but it isn't hugely soft, just not L quality, but this is something I didn't expect (tho I did expect the worse).

The only problem is the autofocus.
Its slightly noise (since its not HSM, this was expected), its about 70% accurate IMO, but its no let down. Not great in low light, but better than most.
The switch is a little annoying, but no biggie. I got used to it withing a minute or so!

It extends to its widest point so at 28mm its at the longest measurements, shortest at about 60mm and slightly extends towards 70.

It extends while focusing (doesn't rotate), but doesn't extend much (around 1CM).


The 77mm filter thread is a nice touch, since its the standard for quite a few L series lenses Wink

Definitally worth getting if you can get it cheap enough :D and don't have the wonga to stretch to a 1K L series of equivalent spec


 
Sigma 17-35mm f2.8-4 EX Aspherical

17_35f2_8_4EX_1_
Review Date: Aug 15, 2006 Recommend? yes | Price paid: Not Indicated | Rating: 7 

Pros: cheap, well built, wide FOV, wide aperture, light
Cons:
a liitle soft, slow auto focus (faster than non-USM tho...), 82mm thread

This was pretty much the first lens I purchased. Its the non DG version and I beleive that at some point it has been rechipped (I got it second hand).

Its cheap price, wide nature and wide aperture was the main reason why I went for it.

I occasionaly use it for portraiture, and the bokeh it produces is great.

Autofocus could be better, just hunts a little in low light, but its nothing to write home about Wink

It is a little soft when wide open but I shoot in RAW and this doesn't bother me and I no longer notice.

There is some slight vignetting when used on a full frame camera (1ds, 5d and film).

The 82mm filter thread is a tad annoying, but I use cokin so it doesn't matter much. I picked up a UV filter on the net cheap for 5...

you can see a selection of my shots taken with this lens here:
http://www.flickr.com/photos/jamesdodd/tags/sigma1735mmf284/