The Sigma 120-300mm F2.8 DG OS HSM ($3,599 direct) isn't a lens for the faint of heart. The zoom, which is compatible with full-frame and APS-C camera bodies and is available in Canon, Nikon, and Sigma mounts, brings new meanings to the words big and heavy.

The Sigma AF 120-300mm f/2.8 APO EX HSM DG OS is a refreshingly unique design. It offers the best of both worlds - the flexibility of the popular 70-200mm f/2.8 tele zoom lenses and the reach of the big 300mm f/2.8 prime lenses. The question of the day is, of course, whether it can deliver ?

This lens fills the void between the 70-200mm zoom lenses and the fixed 300mm lenses. Great for shooting wildlife that is on the move. Also good for sports where a 300mm or 400mm is too much reach and the 70-200mm may not be enough. I can easily shoot both ends of the floor at a basketball game.

This is an in-depth review of the Sigma 120-300mm f/2.8 DG OS HSM Sport, a high-end super telephoto lens with a versatile zoom range and a wide constant aperture of f/2.8, designed for wildlife, sports and portrait photographers. This is the third iteration of the lens.

The Sigma 120-300mm f/2.8 DG OS HSM Sports Lens is a physically beautiful lens that delivers also-beautiful image quality even with a wide open aperture. Remarkable is that this lens has the widest max aperture available in any 300mm lens (f/2.8), but still offers a significant 120-300mm zoom...

This 2.5x zoom lens sports a constant f/2.8 maximum aperture, silent focusing and optical stabilisation. It slots into Sigma's 'Sports' range of lenses and is especially interesting as the zoom range is similar to that of a 70-200mm lens with a 1.4x teleconverter fitted, whilst maintaining a fast...

Sigma has an enviable corner on the f/2.8 long telezoom market: Its massive 200–500mm and more manageable 120–300mm full-framers are the sole occupants of the niche. Now, Sigma has upgraded the latter, adding image stabilization to this pro's 70–200mm staple on steroids.

High-quality telephoto lenses for DSLRs are tricky to buy. They're a huge investment, with prices starting at around £1,500 and heading sharply skywards. There are also considerable usability problems: long focal lengths require fast shutter speeds, which require large apertures, which all results...

Bought this lens after long consideration and after testing a used non OS version. Very pleasent surprise after testing on birds and wildlife. Have a supersharp Canon 100-400 but need more reach and better F plus full AF which is imposible witch Canon and a TC (unless you go for 1D).

Sharp wide open, super sharp from 6.3; Takes TC with full AF; 2x very good from f9.

Heavy; Inconsistent AF wich requires micradjustment.

Practically every optics producer has a unique lens on their offer, something which you won't find in line-ups of its competitors. Sigma boasts several such models, mainly among its zoom telephoto devices; for example the very well-done Sigma 100-300 mm f/4 DG EX APO IF HSM was one of a kind.

unacceptable frame edges after attaching the converter; weak performance against bright light; necessity of using huge 105 mm filters; lack of autofocus limiter