The lens according to the declared characteristics is very good. Sharpness and other image quality are excellent. BUT! The lens does not focus well or does not focus at all in low light, even when illuminated by a red grid from a speedlight. It was sold due to the fact that the lens stubbornly did not focus in the photo studio. The official service did not reveal any problems.
Canon EF 40mm f/2.8 STM Lens - Fixed Black (6310B002) for US Cameras
76 Review
📷 Nikon AF-S NIKKOR 50mm f/1.4G Lens with Auto Focus: Perfect for Nikon DSLR Cameras
76 Review
Canon EOS SLR Camera Lens EF 24-105mm f/4 L IS USM
124 Review
Nikon 50mm f/1.8D Lens: Perfect for Nikon DSLR Cameras!
97 Review