I just acquired a LNIB copy of the Samyang. I have found that the image on the LCD will make me seasick. When I half press the shutter button the image wobbles around. I turned the body's IBIS off and the image settled down. Weird. I am also having a problem getting a sharp image even at various distance settings. MY trusty tripod did not help. I hope this is only a matter of technique......help!