Petapixel published its review of the Sigma 16-300mm F3.5-6.7 DC OS | Contemporary, which you can watch in full above or check out the excerpts below:
Super zooms are convenient, but we haven’t seen many for mirrorless
A lens like this is aimed at torists
They tested the lens on a full-frame camera that gives 26MP when cropped to APS-C, so it should be representative of performance on a high-end APS-C camera
Compact and takes 67mm filters while weighing 615g
Weather sealed
It has a tight zoom with a locking switch, so creeping isn’t an issue
The manual focus ring is ok
6-stop IBIS in lens
Autofocus is quick and accurate with HLA motors
Impressive 1:2 macro at 70mm
You can work close, but there isn’t much working distance, so the shadow of the lens might get in the way
Sharpness is fine at 70mm up close but not amazing
Very good at preventing flare
No ghosting
Not great bokeh because it is busy with some onion rigs
There is some digital correction of chromatic aberration and distortion with some vignetting
Super zoom lenses are generally going to need some correction so that is fine
The center is decently sharp at 16mm f/3.5, but the corners will need some stopping down, but are always a little blurry
At 300mm, sharpness is excellent, and the corners are improved with only a bit of softness, but the corners won’t get super sharp, which is ok for most applications
16-300m is a huge range that is largely for travel photographers