Alter MK 503 -5” F/10 Mak Cass.

Specifications
Clear Aperture ----127mm (5.0”)
Focal Length ----1270mm (50”)
Tube Diameter ----168mm ( 6.6” )
Tube Length ----350mm ( 13.8”)
Tube Weight ----3.8kg ( 8.4lb)
Back Focus ----30mm ( 1.2” ) To 220mm ( 8.7” )
Diameter Of Secondary Obstruction ----42mm (1.7” ) 33%
Photographic F.O.V. ----1° 54’
Meniscus ----BK7 Glass Less Than 1% Reflection Broadband Multicoated
Mirror ----LK5 Aluminized SiO2 Protected
Tube ----Aluminum Cream Glossy Finish
Focusing ----Moving Mirror Zero Image Shift
Finder ----7x35mm On Quick Release Bracket
Camera Holder ----Yes
Optical Quality ----1/6th Wave PTV Or Better
Cooling ----No

Comes In A Padded Carrying Case -------------------------------------------------------Price $US 789