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March 21, 2010
Product Description
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 well suited 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-Layer Coating 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 ratio of 1:4.1. The incorporation of HSM (Hyper Sonic Motor) ensures a quiet and high speed auto focus.
Sigma 18-50mm f/2.8-4.5 SLD Aspherical DC Optical Stabilized for Sony Digital SLR Cameras
read comments (5)
March 21st, 2010 at 9:56 am
Hello: I dont want this to be too lengthy, boring & too techie, just the truth for real world usage.
I just received the lens today and I would like say that it is nice looking lens.
Build quality is very good…metal mount, matte finish, and high impact plastics.
*Overall length does not change so that means no dust or dirt could easily go in the barrel. With a zoom lens, I noticed that when zooming in and out, the lens is like a vacuum, sucking in dusts and dirt, if your not careful.
Here is a few things that I would have liked coming from this lens:
*2.8: nice but usage only on the wider end of 18mm. Not throughout the zoom range like the competitors.
*HSM (Hyper Sonic Motor): not as quiet or fast as I would like but it gets the job done. It’s more of really quiet clicks…not like my Nikon SWM.
*OS (Optical Stabilizer): not as good as I liked it to be.
*Lens Hood: a tad longer than competitors. It should block light strays though…
*I wished that it would have come with those fancy Sigma lens pouch to keep it in
I mounted this lens on my Nikon D2H and D90. The lens is sharp but not sharp enough. I guess it depends on the size of the pixels too (D2H 4MP vs D90 12.3MP). Which camera will win??
Rating: 4 / 5
March 21st, 2010 at 11:16 am
I just received this lens, and I’ve decided to return it. The main reason is because it isn’t sharp enough, but also, the 2.8 aperture doesn’t apply to the full range of the zoom…just the wider end. The maximum aperture at 50mm is 3.5.
Rating: 2 / 5
March 21st, 2010 at 2:15 pm
It looks more solid than the Canon 18-55 kit lens with its metal mount, but in terms of IQ, it is not better. So the only advantage is its f2.8. Eventually I returned it because I don’t think the benefit is worth the investment.
Rating: 3 / 5
March 21st, 2010 at 4:42 pm
I was looking for a lens that would allow me to get wide angle indoor shots and great quality outdoor shots of paintings and drawings for publication with my canon eos xsi. this lens is perfect and is the absolute best value on the market!! i’ve shot a number of sporting venues with this lens and its given me all i hoped for! the wide aperature captures every ounce of light in not-so-perfect conditions for surprisingly accurate images.
Rating: 5 / 5
March 21st, 2010 at 5:56 pm
This is a great lens for two hundred bucks. The construction is very nice. Very sharp at over f6. Compare to the Nikon 35mm/1.8 at ~25-40mm f6-11 is very hard if not impossible to tell the differents at the computer. I was a little worry ordering this lens since a lot of people complain about front and back focus. I been a film guy for over 20years and this is my first Digital SLR lens. Very nice contrast and color too.
Rating: 5 / 5