8.8 inch f/12.3 APO Refractor

[johninderby]

8.8 inch f/12.3 APO Refractor

Came across this scope from the Chinese manufacturer Hioptic while looking for something else. Not what I'd expect to see from a Chinese manufacturer, but it certainly looks interesting. I wonder if I should click on the "Require Sample" link?

http://www.hioptic.com/telescopes/refractor/large/NDT2700x220.htm

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): 1°

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

John

[Peter Drew]

Hmmm, I'd like to see a little more detail about the objective, like number of elements and glass types. Seems rather a long focal ratio for current APO's and the diameter and focal length are identical to one that I have and that's an achromat. Nice looking scope though, did'nt notice a price?

[mark123]

I had a look at the Hioptic website. Could be interesting to request a sample!!