Sigma's 18-50mm F2.8 DC DN is the first third-party lens to be licensed to use Canon's RF mirrorless lens mount. It, along with the forthcoming 10-80mm F2.8, four F1.4 DC DN primes and Tamron's promised 11-20mm F2.8, make the APS-C end of the system much more credible as an option for enthusiast photographers.
As with Canon's own RF-mount lenses, any distortion correction parameters do not appear to be embedded in the Raw files, meaning we've had to step away from our standard Capture One processing protocol. We've been using Capture One for the past few years because it lets us use the corrections as planned by the lens maker as part of its design (Adobe typically creates its own correction profiles). In this instance Sigma provided us with a profile to allow the images to be rendered properly in Camera Raw.
Have a look to see how the 18-50mm F2.8 behaves on the Canon EOS R7, a camera that finally seems on the brink of gaining the lenses to live up to its enthusiast capabilities.
Click here to explore our Sigma 18-50mm F2.8 DC DN | C gallery on Canon RF-mount
from Articles: Digital Photography Review (dpreview.com) https://ift.tt/Yyfgs9I