As long as you can stand over the 52 without being off the ground or on tip toe, I would be more concerned about the reach. A quick and dirty method to get you in the ball park is to have the shop set the seat height and setback as DaveSSS says and then put your elbow against the tip of the saddle and see where your fingers land with respect to the middle of the bars. Usually your fit will end up a couple of cm's longer than your finger tips. This does not replace a good fitting, but at least you can check if the frame is even close.