| ||The filter wheel, integrated into the G2CCD camera body,
provides 5 positions for filters in standard 1.25"
threaded cells. The new alternate filter wheel has 6 positions for 1"
glass-only filters. Individual filter sockets are not threaded, because
there is no standard for 1" filter cell thread. But there are 3 threaded
holes for plastic M3 screws to fix the filter in place