Hi Chris, > 32K steps figures to be 1/7 inch at the UTA That 18 incher must be a VERY long telescope ! 32K steps => 1 step ~ 0.6 arcmin; tan(0.6 arcmin) = 0.0002 1/7 inch / 0.0002 = 60 feet !!! Unless I missed something,... (I'm a metric man, had to convert everything into mm first ;-) Bratislav