Just curious, can someone please tell me why some company has not invented an SRO or MRO that provides focus enhancement even if it was only a 4X versus none yet? Please, any optic that looks like a scope is not to be in this discussion. I shoot a DR with a MRO...with my aging eyes I would love to have even a 4X at 100 yards. I guess I am looking for the enginners of our group to explain why this cannot be done.