JUST GOT THE LENS...SET IT UP ON TRI-POD IN STUDIO..TEST SHOTS IN ALL MM RANGE..SHOOTING MANUAL .. NOT RAW FILES, BUT 24.MEG FINE...SO FAR SO GOOD..LENS LOOKS TO BE WELL MADE..FEELS GOOD IN HAND...i find it interesting the spec sheet says DO NOT USE VIB-REDUC IF MOUNTED ON TRI-POD..

This one I bought it from snap real after lot of research and comparing prices at various portals I am very satisfied with the product and fast delivery

A fine high value zoom lens. Stabilisation was a problem until I used the Sigma dock and put the OS into the Dynamic mode setting - magic, then it's as good as most Canons' IS. I would assess the Sigma 150-600 C OS benefit as 3.5 stops.

Still decently sharp at 600mm (F8-F11) Autofocus works well on 6D Excellently sharp between 150mm to 430mm Really gives the Canon 400mm F5.6 L a run for the money at 400mm

None at price point (A bit soft in the corners at 600mm FF; but hey its as good as the Canon EF 400mm F5.6 L which has no IS and about costs about the same and better the Tamron 150-600mm at 600mm

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.

I Purchased this recently, great service.

If you spend a lot of time photographing wildlife, sports, aircraft in flight (or even UFO's) I'm sure you've longed for a lens with extreme telephoto reach. Sigma now offers a tough, quality 150-600mm f/5-6.3 DG OS HSM Sports lens that can fulfill the wishes of many nature and action shooters.

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.

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.

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

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.