For Sale Astro-Tech 8" f/8 Ritchey-Chretien with Moonlight High Resolution Stepper Motor focuser


For sale is an Astro-Tech 8" f/8 Ritchey-Chretien with Moonlight High Resolution Stepper Motor focuser in excellent condition. I am the only owner and user of this scope and focuser. I have owned this scope from February 2012 to the present and was used primarily for AstroPhotography. This scope is in excellent condition with no scratches on the body. The mirror has no blemishes other than the expected dust on the surface.

Specs from the Astronomics web site:
* 1625mm focal length
* 8 inch f/8 true Ritchey-Chretien hyperbolic mirror optical design
* 0.57 arc sec resolution
* low thermal expansion quartz primary and secondary mirrors
* 99% reflectivity non-tarnishing dielectric mirror coatings
* High strength/low thermal expansion carbon fiber optical tube
* ten contrast-enhancing main tube knife edge light baffles
* two dovetail rails, one Vixen-style and one Losmandy-style "D-plate".

Included with the sale:
*2" extension ring
*Two 1" extension rings
*Moonlight focuser with High Resolution Stepper Motor CS model flange, 1.15" travel brass compression ring drawtube.

***NOTE*** You will need buy the motor controller if planning to use for automation.


Asking $1500.00.  Will ship CONUS only. Prefer PayPal.  The AT8RC optical tube will ship in the original box. Please email me with any questions.

IC 5067



IC 5067 is an HII emission, and part of the Pelican nebula located in the constellation Cygnus. IC 5067 is around 1,800 light years from Earth.
Imaging telescope: Astro-Tech 8 inch Ritchey-Chretien telescope
Imaging camera: QSI 683wsg-8
Ha data 3 hours
SII and OIII data 2 hours and 20 minutes each filter.
PS CS5

Losmandy G11 with Gemini II German equatorial mount.


Wide field of Helix nebula


Widefield of Helix nebula in Aquarius
This was imaged using the 80mm Orion EON and the Astro-Tech 8" Ritchey-Chretien with a focal length of 1625mm (f/8).
RGB 6min subs totaling 3 hours (1 hour each channel) using the Orion 80mm EON.
Ha 20min subs totaling 1 hour and 20 minutes.
OIII 20 min subs totaling 2 hours using the Astro-Tech 8" Ritchey-Chretien with a focal length of 1625mm (f/8)
Imaging camera:  QSI 683 wsg-8
Losmandy G11 Gemini II German equatorial mount
Imaging telescopes:  Orion 80mm EON and Astro-Tech 8" Ritchey-Chretien.
Processing software:  DeepSkyStacker, Photoshop CS5 and RegiStar

the Rosette nebula in HaRGB



Rosette nebula (aka NGC 2237, NGC 2238, NGC 2239, NGC 2244, NGC 2246) is an emission nebula associated with open clusters of stars located in the constellation of Monoceros, 5,200 light years away.

Imaged from Ocala, Florida. 
RGB data: 2 minute exposure stacked in DeepSkyStacker for a total of 3 hours and 40 min using a modified Canon Ti1.
Ha data: 15minute exposures stacked in DeepSkyStacker for a total of 2 hours and 45 min. using the QSI 683 ws cooled CCD camera.
Processed in Photoshop CS5
Imaging telescope Orion 80mm EON
Losmandy G-11 with Gemini II German equatorial mount.

Widefield of the Tadpoles



Here is a widefield image of IC 410, an emission nebula about 12,000 light-years from Earth, in the constellation Auriga. Near the center of the nebulous region is a star cluster ( NGC 1893) and just to the bottom right of this cluster lies two structures that resemble tadpoles. These structures are made of leftover hydrogen and dust from the formation of the star cluster and the "tails" are from the solar wind coming from the stars of NGC 1893.

This was imaged using red, green and blue filters and taking 6 minute exposures stacked, to improve the signal to noise, for a total of 1 hour 18 minutes in the red, and 1 hour in each the green and blue filter.
Fifteen minute exposures were taken through a hydrogen alpha filter for a total of 5 hours and 15 min. integration time.  Many emission nebulas are composed of hydrogen and when excited by nearby stars they glow red.  Using a specialized filter like the hydrogen alpha filter enhances the detail in the nebula.
Imaged from Ocala, Florida
Processed in Photoshop CS5
Imaging telescope:  Orion 80mm EON (FL 480mm)
Imaging camera:  QSI 683 ws
Losmandy G-11 with Gemini II German equatorial mount

IC 443 the Jellyfish nebula



IC 443 the Jellyfish nebula
Supernova remnant located in the constellation Gemini about 5,000 light years from Earth. A supernova remnant is the material expelled from a massive star that burned up all of it's fuel and collapsed onto itself.
IThis target was imaged from Ocala, Florida using the QSI 683 cooled CCD camera and an Orion 80mm EON (FL 480mm).  I combined 6 minute subs to total one hour in each color in Red, Green and Blue.
To image the detail  in this nebula I used 15 minute exposures through a hydrogen alpha filter for a total of 4 hours integration.Taking multiple exposures improves the signal to noise ratio.
This was processed in Photoshop  CS5
Orion 80mm EON (FL 480mm)
Losmandy G-11 with Gemini II German equatorial mount.
Feel free to share if you enjoy this image.

M 106 widefield



Here is a reprocess of M106 with accompanying galaxies NGC 4217, NGC 4248, NGC 4232, NGC 4231 and NGC 4220.
M106 is a Spiral galaxy in Canes Venatici ~23.7 million light years from Earth.
This is a composite image in which the larger telescope was used to capture detail in the larger galaxy (M 106) and the smaller focal length telescope was used to capture the wide field of view.  
This was imaged from my backyard in Ocala, FL using a combination of 6 min and 10 min exposures stacked in DeepSkyStacker for a total of 6 hours 40 min.
Imaging telescopes Orion 80mm EON (focal length 480mm) and an 8 inch Ritchey-Chretien (focal length 1625mm)
Imaging camera was a QSI 683 ws cooled CCD camera
Losmandy G-11 with Gemini II German equatorial mount