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||6/5/2004 5:13 AM
Saarbruecken, - Germany
ALTER MN 68
6"F/8 ( 152F/1200) Maksutov Newtonian. In General same design as excisting MN 66 Telescope, excapt that this new telescope is fully optimized for planetary and douple star use . This scope comes additional with an cooling fan and aircooling holed cell of meniscuslens. On top of the tuberings are mounted a guidingscope plate and on bottom side as an standart an Losmandy G11 rail ( other rails are possible on request).
Color of tube is cremewhite. 20% Central obstruction is already rather small and allowing MN systems to compare against same quality apos with about 1 inch less aperture. This new design with only 15% C.O. is a visual superkiller scope.
Doing an startest the central obstruction looks not more than an thinny central zone you see sometimes in high quality refractors.
Its nearly impossible to see more energy in the first diffraction rings, than in an nonobstructed refractor.
This new design should be the nearest possible matching design of any telescope against high quality colorfree apochromatic refractors.
The backfocuse is still enough to use the scope with CCD cameras with smaller chips.
• clear aperture: 152 mm
• secondary diameter 23 mm
• focallenght :
• tubediameter : 200 mm
• tubelenght : 1,200 mm with cooling fan
• tube weight : 10.7 kg ( 23.54 lbs)
• central obstruction : 15% of diameter
• back focuse over 2" focuser adapter : 12 mm
• Reflection of mirrors : 96 %
• Material of mirrors : Pyrex
• bracket : for 50mm finder: yes
• Picky Back Cameraholder included
• 2" JMI-DX 3 Crayfordfocuser
Includet is also Zygo interferometrical Testreport showing the system quality, as well as a new longer outside secondary holder for easy collimation and the new tuberotating ring system
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