Sigma 18-50mm f/2.8-4.5 SLD Aspherical DC Optical Stabilized for Nikon Digital SLR Cameras
- Lens Construction - 16 Elements in 12 Groups
- Angle of View - 69.3 - 27.9 degrees
- Number of Diaphragm Blades - 7
- Minimum Aperture - F22
- Minimum Focusing Distance - 30cm/11.8 in.
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-... More >>
Sigma 18-50mm f/2.8-4.5 SLD Aspherical DC Optical Stabilized for Nikon Digital SLR Cameras
Filed Under: Nikon Cameras



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
I bought this lens as an upgrade from the kit lens (18-55 IS) on my Rebel XS. I’m quite pleased; although, the lens is not as sharp as I’d expect at the larger apertures in low light. It’s still much better than the Canon kit. I’m just getting back into “digital” SLR photography from my “35mm” college days… so, I’m learning as I go. Overall, I got more than expected for the price tag ($199). I figure this will be a great lens to learn with and later, I’ll upgrade as my skills progress. I’m an industrial designer, so I’m really sensitive about craftsmanship (build quality), use of materials, etc. I must say I am impressed overall with the lens in this regard. It’s much better than some reviews of Sigma lenses might suggest. Particularly, I liked the rubber grip details and the use of filled plastics for impact strength. Nice job Sigma! I was a little hesitant about 3rd party lenses… won’t be an issue going forward.
Rating: 4 / 5
I purchased this lens to replace the 18-50 kit lens on a T1i. I am pleased with the construction and performance of lens.
The auto focus motor is not as fast or quiet as the canon USM. It is faster and quieter then the kit lens. I would say it is in between the two.
The Optical stabilizer is good but under performs the kit lens. This negates the 2.8 aperture some when comparing it to the kit lens.
Unfortunately I will return this lens. The deciding factor is on my particular T1i the lens purchased does not auto focus correctly. At 2.8 aperture with its narrow depth of focus the auto focus can not be used. It is a real shame that Canon does not add the AF micro adjust feature to the T1i. I would keep this lens if I could calibrate the camera for it.
Rating: 4 / 5
I have been shooting with this lens for just two days…just two days and I am already relieved of the pain of the kit lens. The f/2.8 is incredible…I can capture photos I have been dreaming to capture. This simply is a great purchase. If I had the money for the 800 dollar 17-70 Canon lens I may have bought it, but now that I have purchased this lens I am much happier to have spent 1/4th on this lens.
I recommend this lens to anyone and everyone for a substitute for the Kit 18-55mm lens.
Rating: 4 / 5
Just a word of caution about the filter recommendation provided during checkout. I just assumed the 72mm filter suggestion was correct and ordered one. However, unlike the more expensive Sigma 18-50mm 2.8, this lens uses a 67mm filter. This is a great general purpose lens at the new $200.00 price point. IMO.
Rating: 5 / 5