Sigma 18-50mm f/2.8-4.5 DC OS HSM

Last updated (09 June’10):
– Review by Lenstip

Sigma 18-50mm f/2.8-4.5 DC OS HSM is a standard zoom lens features 18 – 50 mm at focal length with maximum aperture of f/2.8-f/4.5. The lens construction has 16 elements in 12 groups and has diagonal angle of view at 69.3-27.9°. Closest focusing distance at 30 cm and has a filter size of 67 mm. The Sigma 18-50mm f/2.8-4.5 DC OS HSM lens weighs 395 g and it measures 2.9 inches in diameter and 3.4 inches long.

Sigma 18-50mm f/2.8-4.5  DC OS HSM
Overall Rating: ★★★★☆ | Latest Price Info

Expert Reviews

Sigma 18-50mm f/2.8-4.5 DC OS HSM Reviews

Lenstip reviews the Sigma 18-50mm f/2.8-4.5 DC OS HSM and writes;
“Sigma, compared to kit lenses, is better made, has a quiet and accurate HSM mechanism, better brightness and gives images of good quality. The least arguments for a swap will have Pentax owners. They have image stabilization in their camera bodies, and a good 18-55 mm kit lens to use, recently in a sealed version. “
rating: N/A

Ephotozine reviews the Sigma 18-50mm f/2.8-4.5 DC OS HSM and writes;
“this lens isn’t a bad performer and will suit those looking either for a replacement upgrade to their standard 18-55mm kit lens, or a solid starter lens that covers the standard focal ranges.”
Rating: ★★★½☆

SLRGear reviews the Sigma 18-50mm f/2.8-4.5 DC OS HSM and writes;
“The Sigma performed well in our tests, with good results for sharpness wide open, and even better when stopped down to just ƒ/4. CA is a bit high at 18mm and distortion is a complicated mix of barrel and pincushion, but nothing overly objectionable.”
Rating: ★★★★½

User Opinions

Sigma 18-50mm f/2.8-4.5 DC OS HSM User Reviews

Excellent lens for an amateur photographer on a budget! | Rating: ★★★★★
“I could not afford higuer-end class just yet, so I opted for this lens, knowing that 18mm, it gives you f2.8. That is pretty awesome. IT works fantastic and smooth. From the beginning, my photos came out pretty sharp, thanks in part to the Optical Stabilization offered, something that other brands cannot offer for that price. Strongly recommend this lens for your everyday photos. Outdoors and indoors. It is not heavy, it is fast, sharp, and practical. “ – by N. J. cruz

Spectacular replacement lens!, | Rating: ★★★★★
“I love the range of the kit lenses but REALLy wanted a better quality piece of glass, silent AF, and NO lens extension while zooming. This lens fit the bill perfectly! The fact that Sigma not only made the ultimate kit lens upgrade, but also included the petal hood as well for $300 really made me think about my next purchase and Canon. “ – by Patrick Offord

This lens uses a 67mm and NOT a 72mm filter | Rating: ★★★★★
“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. “ – by Greg Matthews

Good features for the price | Rating: ★★★★☆
“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. “ – by Charles Kearney

Very sharp and fast lens. | Rating: ★★★★★
“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. “ – by A

Great deal | Rating: ★★★★★
“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.” – by Thomas Colvin III

Excellent lens for the price! | Rating: ★★★★★
“The autofocus is tack sharp, the optical stabilization is excellent, and my favorite thing so far is the f/2.8 aperture at 18mm. Combined, the f/2.8 and the OS in low light conditions has saved a lot of wobbly shots that I would have likely tossed. I own two other Sigma lenses (Sigma 10-20mm and Sigma 105mm macro) and have been very pleased with the build quality and durability of Sigma lenses. You won’t go wrong in buying this 18-50mm Sigma, it’s a great lens and a great deal! “ – by Z. Henneman

A mixed bag but an overall win especially for the price | Rating: ★★★★☆
“This lens is sharp enough at all zooms stopped down just a little. It’s really quite a surprise. I wouldn’t try to make billboards with it, but it should print up to 12×18 with a little care in shooting. The optical stabilization on mine is really very good and I’m impressed with how far it allows me to push the shutter speed on still life shots….” – by John W. Griggs

More user opinions | Write your opinion


Sigma 18-50mm f/2.8-4.5 DC OS HSM Sample Photos

Sigma 18-50mm f/2.8-4.5 DC OS HSM Sample Photos @
Sigma 18-50mm f/2.8-4.5 DC OS HSM Sample Photos @
Sigma 18-50mm f/2.8-4.5 DC OS HSM Sample Photos @

Features & Specifications

Sigma 18-50mm f/2.8-4.5 DC OS HSM Specifications

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.

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