I have recently purchased a s&b FT scope, and I have a doubt. I have marked the side wheel , and I was surprised that the marks of the distances does not follow an exponential or regular distribution. I have to explain, that i have marked the side wheel from 50 to 7 meters, in the long distances for example i have more than 5 mm distance between 50 and 48 meters, and the same till 40 meters, but between 40 and 28, the marks are closer. Only between 40 and 28 meters, the separations are smaller. From 28 meters to 7 meters, the marks are increasingly separated. This is normal?