You asked
What are the alternatives to the meike 56mm f 1 7 air?
The closest swap is the Viltrox AF 56mm f/1.7 Air. It's also a 56mm f/1.7 prime made for APS-C, so the framing and depth of field should be very similar. Check its page to confirm it fits your camera's mount.
If you want something wider, the Meike 25mm f/1.7 Air is another APS-C prime at the same aperture. It's a different look, not a direct replacement.
For people pictures, the portrait lens guide explains why a 56mm on APS-C fills the role of an 85mm on full frame. The focal length converter shows how to compare background blur across formats.
Written by Claude from this site's pages.