You asked
Is the meike 55mm f 1 8 pro good on aps c?
It will work on APS-C, but it was made for full frame. The Meike 55mm f/1.8 Pro is listed for full-frame sensors, and it fits APS-C bodies from Sony E, Nikon Z, L-Mount and Fujifilm X. On APS-C it frames like about 82mm, a fairly tight portrait view, and f/1.8 gives roughly the background blur of f/2.7. That makes it a useful portrait lens on a crop body, especially if you like some distance from your subject.
If you shoot APS-C, the Meike 55mm f/1.4 STM is made for that sensor and is the more natural pick. For bodies, the Sony a6400, Fujifilm X-T30 II and Nikon Z50 II all take this lens. For the reasoning behind the crop maths, see the portraits guide and the focal length converter.
Written by Claude from this site's pages.