The Hutech 7" f/4 Maksutov-Newtonian astrograph utilizes the basic ITE Mak-Newt optical assembly which features:   No-spider design eliminates diffraction artifacts Fast photographic design with compact tube (27" length) Light weight (19 lbs) 8" and 10" models also available by special order.   Two options available: Borg helical focuser version: Extra-wide rear optical path insures no mechanical vignetting over a full 35mm frame Indexed positioning for repeatable focusing Camera rotatable for flexible framing 52mm filters such as LPS filters accommodated Moonlite focuser version*: 2-speed focusing Electric focuser with PC control available * not suitable for SLR cameras due to limited back focus.   Hutech 7" f/4 Mak-Newt astrograph with Canon DSLR and Mini Borg guidescope. Sample Photos (click on photos to enlarge):