Pentax 645D is designed for professional photographers, with many functions and playability?

Your statement is not accurate enough.

It is a fact that the Pentax 645D is designed for professional photography. However, professional photographers' requirements for the professional functions of cameras are also very clear, even quite demanding. Without good professional functions, Pentax 645D is not a professional machine at all! The professional functions of Pentax 645D are almost everything-not lacking, not to mention "lacking a lot"!

The 645D is not equipped with some amateur functions, such as automatic scene mode, on the "entry-level" digital SLR camera, and there are also some functions that professional photographers don't need, such as the high-speed continuous shooting function necessary for sports photographers, because professional photographers and senior amateur photographers don't need these amateur functions and professional functions.

Therefore, Pentax 645D is not suitable for junior amateur photographers who have just entered the photography door, and it is not suitable for the work needs of professional photographers such as photographers. It is still very suitable for professional photographers and amateur photographers who have reached the master level.