One knob design. 1.250 diameter stainless steel shafts. Fully locking, unique tangent arm design altitude adjustment, 14-64 degrees, large knob for easy alignment. Laser engraved latitude scale in 2 degree increments. R.A. circle engraved for Northern and Southern Hemisphere.
Porter slip ring design.
21 lb counterweight. 7 lb and 11 lb extra counterweights available. Through the axis polar scope, works in Northern and Southern Hemisphere. Polar scope optional. Instrument weight capacity 60 lbs.