06-14-2022 01:22 AM
I was wondering if any of the canon ef to rf adapters worked for non-canon brands such as sigma?
07-13-2022 01:17 PM
The camera is still pretty aware of which lenses are designed for crop sensors and which cover the full frame, even from third parties. EF-S and EF are actually identical in every facet except for the physical protrusion of the rear element. Whether or not the camera can detect it is something that the lens or camera is aware of via firmware or database. For example, the sigma 18-35 forces the camera into crop mode and uses a regular EF mount, not EF-S.
Because it's not a fully manual lens, I would be about 99% sure it would crop automatically.
02/20/2025: New firmware updates are available.
RF70-200mm F2.8 L IS USM Z - Version 1.0.6
RF24-105mm F2.8 L IS USM Z - Version 1.0.9
RF100-300mm F2.8 L IS USM - Version 1.0.8
RF50mm F1.4 L VCM - Version 1.0.2
RF24mm F1.4 L VCM - Version 1.0.3
01/27/2025: New firmware updates are available.
12/18/2024: New firmware updates are available.
EOS C300 Mark III - Version 1..0.9.1
EOS C500 Mark II - Version 1.1.3.1
12/05/2024: New firmware updates are available.
EOS R5 Mark II - Version 1.0.2
09/26/2024: New firmware updates are available.
Canon U.S.A Inc. All Rights Reserved. Reproduction in whole or part without permission is prohibited.