>>3186203yes, but under a certain shutter speed (1/60 or 1/125 usually depending on focal length of your lens) the physical size of the mirror will cause the camera to shake and blur the image. More visible and more prevalent in larger cameras so more visible and more prevalent with the rb than the smaller SQ-A. I loved my sq-a, the speed grip is amazing. Lenses were as contrasty and sharp as Hasselblad. I only sold it to finance a trip and regretted it right away.