This lens was right out of the box and onto my camera. I found the focus to be tack sharp without any tuning and all focal lengths tested. Great color and contrast. Focus was fast and quiet. The constant length, and non-rotating lens is a plus for me.

I am on the fence to return this item. .. I was looking for a good travel lens that could cover good street and portrait focal lengths with low light capability . Description says designed for Aps-c. 50-100mm f1.8 from sigma... This sounded great. ..

I am still on the fence for this lens. It might be because I love my 28-35 1.8 so much that I need to give it a chance

Sharp; fast; build quality; much better than the 24-105

Now this is a heavy lens, tripod foot but I learned to live with it, hoped it would be as great as my 18-35 1.8 but no not quite; Did I mention heavy No OS

I want to say I love this lens.It is amazing no doubt.The only reason for 4 stars is cz of how heavy this baby is.If ur using a tripod or mono pod ur sorted which I think is the way this lens is built.But if ur going to be moving around a lot its quite a work out.

There have already been a number of reviews online of this lens, most praising the clarity and sharpness of the images it can produce, and so far I can't fault them on those points. It is crisp, fast and silent.

Clarity; Sharp Focus

Heavy; Micro Adjustment; Slow Zoom

This lens looks and feels quality. Be warned its is a bit of a monster, and is a heavy weight. The image is sharp and beautiful. I have two Sigma art lenses (I also have the 18-35) now and opted for these as they are billed as professional quality glass for aps-c cameras.

The Sigma 50-100mm F1.8 DC HSM Art ($1,099) is a premium telezoom lens, aimed at photographers working with APS-C SLRs. It's designed around the same principle as the standard 18-35mm F1.8 DC HSM Art zoom, and is likely to appeal to the same demographic.

Very sharp; Bright maximum aperture; Nominal distortion; Rotating tripod collar; Compatible with Sigma USB Dock; Available for multiple systems

Heavy; Short zoom range; Omits image stabilization; Focus may need adjustment; Pricey

Is the Sigma 50-100mm f/1.8 DC HSM A as good as the first APS-C zoom lens with a maximum aperture of f/1.8? Michael Topham finds out

The Sigma 50-100mm f/1.8 DC HSM Art Lens will win no awards for its zoom focal length range, but as of review time, no zoom lens has a wider aperture. And, at the 100mm end of the range, there is no equal even among the prime lens offerings.

Sigma has been introducing some very impressive lenses in their Art range and the latest addition is this 50-100mm f/1.8 DC lens. Designed for APS-C cameras and with a very useful constant f/1.8 maximum aperture, this gives a "35mm equivalent" of around 75-150mm.