I haven't fully used it, yet. I did try to capture an eagle and got nothing but blur. Perhaps operator error. Still working out the kinks.

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

I can't begin to brag about enough about this lens. I bought the Canon EF version and use it with the Sigma MC-11 Adapter on my Sony A6300. Great AF and Stability Control performance.

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.

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

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

The Sigma 150-600mm f/5-6.3 DG OS HSM Contemporary lens offers very similar image quality to the Sports version at a cheaper price, whilst being much lighter and therefore more suitable for hand-holding, although it doens't feature the same level of weather-proofing.

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

While it may not be obvious from the charts, the Sigma 150-600mm f/5-6.3 DG OS HSM Contemporary surprised us in a positive way - at least when taking its comparatively low price tag into account. Yhe lens is generally capable of delivering a good to very good quality in the image center.

This is a very popular lens for our bird photographers, although it is not for the faint hearted and you will need to consider a tripod/monopod.