Despite the autofocus problem, the score is 5, because. the glass is really very good, although the price for it is not so attractive now. There is only one advice: buy a lens only where they will give it to you for testing for some time (in my case it was 2 weeks) and during this time check it in full under a variety of conditions. Before that, it is better to thoroughly dig on the Internet about the compatibility of the lens with your camera and the real possibility of aligning it on your camera (by yourself or in the SC) in case of problems.
Canon EF 40mm f/2.8 STM Lens - Fixed Black (6310B002) for US Cameras
76 Review
New Nikon 18-105mm Vibration Reduction π· Zoom Lens with Auto Focus for Nikon DSLRs
104 Review
π· 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