The Bushy 6500 glass is like that in the 4200 series.... good for sure. It's made by LOW in Japan I believe. IMO, the Zeiss Conquests are a tad better (but not much). The 6500's are 30 mm and the Conquests are 1". BTW, I have both a 4200 Elite and the Conquest with Z 600. In all honesty they would both be very good.