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Review Summary
2011-12-29T19:00:00
I was looking for a bargin lens for my new 60D and tried 3 other lenses before purchasing this one. I love this lens, pictures are Sharp and color is amazing. I do a lot of senior/family photos and I can take on 18mm and zoom to 100% and have my picture crisp. That says a lot to me about what a great lens this is. If you are wanting a great lens for half the price this is the one for you.
Amy L.
2011-07-05T21:00:00
This lens beats the stock lens hands down. it's built well, feels good in the hands, and is perfectly balanced. The reason I bought this lens was because I needed a fast lens to take wedding photos at close and far distances and this lens fit the bill. It is a great lens for low light situations.
NORMAN T.
2011-06-29T21:00:00
i used this as a standard zoom replacement and was intrigued by the 2.8 aperture on it. however, i found it was so inconsistent when zooming on people right in front of my face. it was a win or lose. i'm used to canon's 50mm 1.8 and had no problems there w/portraits. also, with regular action, like people walking around, it would b blurry focus.doesn't do well in low light. i dunno what i was thiking. its going back. i'll stick to my nifty 50 for now.
Afshan M.
2011-04-24T21:00:00
I Just received this lens and like it. I Got a 28-135 USM lens and was in need for a wide angle. This is perfect. Great. Yet to put it through its paces. Hopefully the images to would be awesome. Need to wait though till the rains stop. Mahlon from Sri Lanka.
Mahlon
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16 Elements in 12 Groups
69.3 - 27.9 degrees
f/22
30 cm / 11.8 inches
1:4.1
67mm
Diameter 74mm X Length 88.6mm
395g / 13.9 oz
Number of Diaphragm Blades: 7 Pcs.
* Vignetting will occur if the lens is used with digital cameras with image sensors larger than APS-C size or 35mm SLR cameras.
* For Pentax mount, if the camera body does not support HSM, auto focus will not be available.



Large Aperture, Standard Zoom with Optical Stabilization...
An upgrade to its predecessor, the 18-50mm F2.8-4.5 DC OS HSM is a lens dedicated to digital SLR cameras with APS-C size image sensors offering a large aperture and Sigma's Optical Stabilization.
Once again, Sigma has also engineered the built-in OS function, an anti-shake system, (for Sony and Pentax mount) allowing the photographer to see a stabilized image in the viewfinder. The combination of the large aperture of F2.8 and anti-shake function makes capturing exceptional photos in low light achievable, and the wide angle is wellsuited for indoor photography.
Two SLD (Special Low Dispersion) glass elements and three Aspherical lenses provide excellent correction for all types of aberrations. The Super Multi-LayerCoating reduces flare and ghosting. Designed with inner focusing and inner zooming systems, high image quality is assured throughout the entire zoom range.
The overall length of the lens does not change during focusing and zooming ensuring convenient handling. This lens has a minimum focusing distance of 11.8 inches (30cm) throughout the entire zoom range and a maximum magnification ratioof 1:4.1. The incorporation of HSM (Hyper Sonic Motor) ensures a quiet and high speed auto focus.
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