80D uses full pixel dual core CMO saf to facilitate professional full HD short film shooting, which is slightly insufficient for the current mainstream 4K shooting, and 90d makes up for this deficiency. < / P > < p > 90d uses a resolution of 3840×2160, a 4K video without cutting, and has a 5-axis anti shake, and a 4K single frame capture of 30 consecutive shots per second. < / P > < p > 90d has 220000 pixel RGB + infrared light metering sensor when shooting portrait, which can detect face in real time and focus. It can effectively prevent scorching. This is not true on the 80D. < / P > < p > 90d when shooting, it supports panning assisted focusing with optical viewfinder to quickly select the focus. This is often done by canon on high-end machines. The upgrade project of < p > < p > 80D is more practical. I believe that for entry-level users, the easy-to-use video focusing function is more attractive than 4K specification. In fact, the image quality of APS-C frame seems to touch the ceiling. What users value is not that the image quality of middle end products is better than that of entry-level products, but the upgrading of other aspects. 80D in the entry-level camera on the basis of a comprehensive upgrade, and with professional bias, home or professional users can use this product to meet their own needs. American companies begin to give up R & D: who should pay for corporate research?