Santel MK6 6” F/12 Mak. Cass.

Specifications
Clear Aperture ----150mm ( 6” )
Focal Length ----1800mm (72” )
Tube Diameter ----180mm (7.1” )
Tube Length ----300mm ( 12” ) Plus Dew Shield 440mm (17.3” )
Tube Weight ----6kg (13lb )
Back Focus ----130mm (5.1” )
Diameter Of Central Obstruction ----50mm ( 2” ) 33%
Meniscus ----K8 Glass Less Than 1% Reflection, Broadband Multicoated.
Mirror ----LK5 Aluminized With SiO2 Protection.
Tube ----Aluminum White Textured
Focuser ----Crayford Type 2”
Finder ----6 X 35 Mm On Quick Release Bracket
Camera Holder ----No
Optical Quality ----1/6th To 1/7th Wave PTV
Cooling ----No

Comes In Padded Carrying Case --------------------------------------------------------Price $ US 1089