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Sigma 10-20mm F4-5.6 EX DC HSM

111_small
Review Date: Jun 21, 2009 Recommend? yes | Price paid: Not Indicated | Rating: 10 

 
Pros: Crystal clear, sharp lens, incredible color, very fun and creative lens to use. Didn't realize its capability on landscape until I took it somewhere that I could truly connect the lens to creativity and scene.
Cons:

There are some negative reviews, but I beg to differ. Here's one of my favorite images taken in the incredible Monument Valley Utah. There's a thousand ways to screw this up, but I love the image and will recall the simplicity of using this lens in a situation when I didn't want to think about equipment. I was too busy being taken back by the breathtaking beauty of this immense landscape.
Judge for yourself:
http://dlborges.zenfolio.com/p199169325/h306f1491#h306f1491


 
Canon EF 100mm f/2.8 Macro USM

ef_100_28_1_
Review Date: Jun 14, 2009 Recommend? yes | Price paid: Not Indicated | Rating: 10 

 
Pros: Great focusing, crystal clear imaging, beautiful bokah, image depth of field like nothing i've experienced in other lenses.
Cons:
no complaints other than this is one ugly and odd shaped lens. Oh, just thought of something useful to say - The lens cap was far too expensive (B&H of course).

I've used this lens seriously on only 3 outings, one of which produced what I consider a winning image for a lifetime. I took this poppy image at UC Davis in the Arboretum, standing up, no tripod, on a whim. There was a distracting green leaf at the bottom left corner of the image which I removed, but other than that the image has a few minor spot removals and moderate cropping.
http://dlborges.zenfolio.com/p151239449/hfc7d2b1#hfc7d2b1

I love this image for the clarity, the depth and three dimensionality, bokah and color combination.
http://dlborges.zenfolio.com/p151239449/hfc7d2b1#h223c827f


 
Sigma 150-500mm f/5-6.3 AF APO DG OS

150-500
Review Date: Jun 10, 2009 Recommend? | Price paid: $1,000.00

 
Pros: awesome lens.
Cons:
for about half the day, the lens would not respond properly in AI servo mode, even though the lens is a late model and the serial number falls outside of the early identified models having that problem. I shoot a 40d. I'm going to keep testing with it though because I did have a problem with the thumb dial on the camera while in AE mode, almost as if the software had locked up. Turning camera on and off didn't help, but eventually it freed up and things returned to normal. Jury still out on that.

This is my second post on this lens. I've now had some more serious time and days shooting waterfowl with the lens, the primary point of buying the lens in the first place. To get these shots in the wild on birds this close, it takes a setup very similar to a duck hunter. Boat out to an isolated wildlife refuge location (Napa/Sonoma DFG Refuge, California), setup up deeks, get the mallard and gadwall calls out and gently coax the birds into your large decoy setup.
http://dlborges.zenfolio.com/cwa/hfdeccae#hef6967e
and
http://dlborges.zenfolio.com/cwa/hfdeccae#h138ba47d

and the toughest shot of all on a drake gadwall, demonstrating the len's ability to track well. f/8,@403mm, 1/2000 with ISO 400.
http://dlborges.zenfolio.com/cwa/hfdeccae#h152e25e2

I'm still working hard with this lens, frankly it shoots way different than any other lens. I think it's contrasty, softness is tough at 500mm, killer at 400mm and below (which puts you in there with the canon 100mm-400mm) and compares to the canon no problem. I've compared both lenses side by side and could not justify an extra $500 for a shorter lens.


 
Sigma 150-500mm f/5-6.3 AF APO DG OS

150-500
Review Date: May 18, 2009 Recommend? yes | Price paid: $1,000.00 | Rating: 9 

 
Pros: Great value, great focus speed, compares head on with the Canon 100-400mm in AF speed, and quality. If you don't mind a more contrasty image, then you should buy this lens and save over $500 compared to the canon.
Cons:
A tad contrasty, at 500mm it's sharp but don't expect to crop or zoom in on the image too much or you'll start to loose sharpness. But, at 500mm I believe it's as sharp as the canon 100mm-400mm because I tested them side by side.

sharpness? http://dlborges.zenfolio.com/p875585347/h12be85f#h12be85f
and
http://dlborges.zenfolio.com/p875585347/h12be85f#h127b15a5


af focus speed? These Gadwalls were at 50 yards, and while I wish I had my shutter speed at greater than 1,000 and my f-stop down a tad to acheive that, this isn't bad while standing on a boat that's moving in the waves.
http://dlborges.zenfolio.com/p875585347/hf740253#hff075d4
I haven't even started using this lens at it's full capacity on a real birding shoot, and I can already tell it's going to produce a high volume of waterfowl images. If the lens happens to get destroyed in the process of being exposed to salt marshes and water, well then at least I didn't spend $6,000 on it. You don't take lenses like that to the locations I go to. Here's another shot:
http://dlborges.zenfolio.com/p875585347/hf740253#h5db2f73