Thank you everybody for your help!
I know officialy entered MF world.
Here are pictures of my Yashica Mat 124 G.A soon I take pictures, I will post them here.
Welcome to the world of medium format and Yashica Mat!
I recommend that you get a lens hood for the camera. It really makes a huge difference as regards image quality with Yashica Mat´s. Also try to avoid shooting above f/5.6 and below f/16. Then you should get uniform sharpness all over the image area.
Ha ha. I was shooting with mine last weekend and had the camera down near ground level for a shot. I had to hold the spot for a minute and wait for the action to arrive, so apparently the guy standing near me must have caught a good long look ground glass because he asked me when I was done with the shot if it took stills & video, because he seen the LCD screen.
Or in the words of coworker of mine. "Wow! This looks just like real life!"