The shutter is firing, but the mirror stays up except at speeds between 250 and 1000. Please consider this item as junk, assuming it will need maintenance. ※ Please note that this is a used item, and I do not possess the specialized knowledge of a camera shop. Therefore, there may be oversights. Please assume that anything not mentioned has not been checked. I cannot offer support or warranty for any changes in condition or malfunctions after receipt. Please only purchase if you understand and accept this. Returns are not accepted for used items.