220mm large refractor telescope
China 220mm/8.8"inch refractor telescope with German heavy duty pedestal stand China 220mm/8.8"inch refractor telescope with German heavy duty pedestal stand add 220mm/8.8"inch refractor telescope with German heavy duty pedestal stand to your favorite see 220mm large refractor telescope sitemap
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Item No. : NDT2700x220 require sample
 
professional 220mm/8.professional 220mm/8.8"inch refractor telescope
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Description : Observatory class 220mm (8.8-inch) refractor with a German Equatorial Mount on a heavy duty pier.

Main Optical Tube Assembly
Air-spaced Apochromat
in a closed tube system. Multiple focus points to facilitate the mounting of various accessories and imaging devices.

Aperture :220mm/8.8"inch

Focal length (f) : 2700mm (108-inch), f/12.3

Field of View (FOV):40'

Angular Resolution (Resolving Power) : 0.52arcsec

Maximum Useful Magnification :
433X

Limiting Magnitude :
15.6

Guidescope
Air-spaced Apochromat

Aperture : 100mm (4-inch)

Focal length (f) : 1200mm (48"inch), f/12

Field of View (FOV):

Angular Resolution (Resolving Power) : 1.145 arcsec

Maximum Useful Magnification :
197X

Limiting Magnitude :
13.9


Finderscope
2-element Air-spaced Achromat


Aperture :: 80mm (3.2-inch)

Focal length (f) : 500mm (20-inch), f/6.25

Field of View (FOV): about 5°


Mount
German Equatorial on a heavy duty pedestal stand


Drive System : SCM (Single Chip Microcontroller) with stepper motors.

Slewing Speeds :

Fast Slew... 60°/minute

Slow Slew : 1-3°/minute

Micro-slew : 1-3'/minute

Guide Slew : 15'/minute

 
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