some fixed power scope questions: 1) does anyone make a fixed 16,besides the v.expensive (to me) MK4? 2) 12x fixed-leupold and sightron both make them with the sightron being a bit more expensive. any experience with either? or sightrons of any type? 3) best guess for max usable range @ 12x for >60 y.o. eyes with tri focals and some astigmatism? i seem to need more magnification at even 100 than i did 10 yr ago. asking because my new tikka t3 varmit 223 looks to be a winner but realistically is never going to shoot anything but paper or maybe a coyote. think i can get sl superior otics with less interfering stuff for same $.