The Astrograph

by Ernst Gamauf

Roll Off Roof Observatory

In spring and summer 2014 I have built
a small Roll Off Roof Observatory

Telescope:

ASA (Astro Systeme Austria) 10" Astrograph
(Newtonian Reflector)

focal length 900 mm, focal ratio f/3,6

Mount:

ASA (Astro Systeme Austria) DDM60

Tripod:

Losmandy HD Tripod

Telescope:

10" Skywatcher Newtonian Reflector
diameter 254 mm
focal length 1200 mm, focal ratio f/4,8

5" Skywatcher Newton Reflector
diameter 130 mm
focal length 650 mm, focal ratio f/5

Mount:

Skywatcher NEQ 6 pro Synscan with Goto

For Widefield-Imaging:

Canon EF 200mm f/2.8L II USM
or
Canon EF 24-105mm f/4L IS USM

Guiding with Skywatcher 9x50 finderscope
and Lacerta MGEN

Cameras:

Canon EOS 500D (modified)
for Color

Canon EOS 500D (Bayer-Matrix removed)
for Luminance

15 megapixel APS-C sensor,
22.3 x 14.9 mm (4752 x 3168 pixel)

Canon EOS 6D (not modified)
20.2 megapixel full frame sensor,
35.8 x 23.9 mm (5184 x 3456 pixel)

FLI ML8300 with FLI CFW2-7 filter wheel
8.3 Megapixel monochrome CCD-Camera
sensor size 17.9 x 13.5 mm (3326 x 2504 pixel)

Moravian G3-16200 with external filter wheel
16.2 Megapixel monochrome CCD-Camera
sensor size 27.2 × 21.8 mm (4524 × 3624 pixel)

Correctors:

ASA 3" Wynne Corrector 0,95x with
Camera Adapter and
Canon EOS 500D

ASA 2" Coma Corrector Quattro 1.175x

ASA 2" Reducer Corrector 0.73x

Baader 2" Coma Corrector MPCC

ASA 2" Reducer Corrector 0.73x

ASA 2" Coma Corrector Quattro 1.175x

ASA EOS-Adapter/Off-Axis-Guider

Guiding:

Lacerta MGEN Stand Alone Autoguider

Lacerta Off Axis Guider/EOS-Adapter

Coma Corrector:

Baader 2" MPCC

Bahtinov-Mask for focusing