I have had this lens for a few days now. So far I am loving it. I have posted a full review on my blog with a bunch of sample images with 100% crops of Australian Wildlife.

Build quality

Bulky

The Sigma 150-600mm ƒ/5-6.3 Contemporary is a very good lens, with an outstanding performance to dollar ratio. It's a great bargain, given both its versatility and the prices for the alternatives from the major manufacturers.

Handling and Features Performance Verdict Specification Sigma has been continually updating their lens lineup to fit into one of three categories, Art, Contemporary and Sports. This super-telephoto zoom lens fits into Sigma's 'Contemporary' line-up of lenses and this lens provides a lower priced...

Good sharpness throughout the zoom range; Well built; Fast focusing; Very keenly priced; Effective stabilisation; Focuses relatively close for a 600mm lens

Zoom creeps when pointed up or down; No weather sealing; except for a rubber gasket on the lens mount

The Sigma 150-600mm f/5-6.3 DG OS HSM Contemporary ($1,089) is a big, heavy lens. But that's no surprise when you consider its maximum reach, full-frame sensor coverage, and sturdy build.

Excellent telephoto reach; Very sharp; Includes tripod collar and lens hood; Focuses quickly; Effective image stabilization system; Zoom locking mechanism; Affordable

Some chromatic aberration; Moderate pincushion distortion; Relatively narrow aperture; Heavy; Not fully dust- and splash-proof

Received mine and I Immediately make Test Shots at 600mm. Very Sharp for Wildlife Shooters,the OS is Very Good also. I'm Very Happy with it so far!

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Although Tamron pioneered the release of the first 150-600mm lens, Sigma followed suit by releasing two versions of lenses with exactly the same focal length and aperture ranges.

The Sigma 150-600mm f/5-6.3 DG OS HSM Contemporary Lens review was created simultaneously with the Sigma 150-600mm f/5-6.3 DG OS HSM Sports Lens review . It is very unusual to be reviewing two just-released lenses from the same manufacturer that share the same focal length range and the same...

Sigma has been continually updating their lens lineup to fit into one of three categories, Art, Contemporary and Sports. This super-telephoto zoom lens fits into Sigma's 'Contemporary' line-up of lenses and this lens provides a lower priced alternative to their 150-600mm Sports optic.

Rented for 4 days from Lensrental.com, $67.91, shot lots of hiking/wildlife/nature/zoo pix, almost all hand-held (on Canon 70D). I'm no bodybuilder but had no problem with weight - when walking the support came from my Kinesis (kgear.com) chest-worn holster, ideal for support and quick-draw action...

Quick focus; portability; sharpness; colors; stabilizer

Manual focus ring too stiff; stabilizer drifts off focus point

If you are into nature and wildlife photography, you probably need an ultra-telephoto lens to photograph Singapore's smooth-coated otters or common plantain squirrels from afar without disturbing these animals.