DAS Activities

DAS Public Nights

Public Nights
Tuesday and Thursday at
DU's Historic Chamberlin Observatory
Current start time is 7:30 pm
Costs to the public are:
$4.00 adults, $3.00 children

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Public Night

DAS Classified

Guidelines (Please Read) | List of For Sale Items 


Listings Last Updated: December 27, 2017

Contact (to List or Remove): webmaster@denverastro.org

Losmandy GM-8
Parks Tube and Williams Optics Focuser
D&G 6″ f 14.6, Achromatic Refractor 
New, Never Used Orion Atlas EQ-G and AstroTech f/8 Ritchey-Cretien
Celestron CPC 800 XLT Computerized Telescope
8′ x 6′ Skyshed Roll-Off Roof Observatory
Astrophotography Equipment (Mount, Telescope)
Brand New Astro-Photography Equipment
CI-700 Mount, Tripod, and Case

 4″ Unitron Photoequatorial Refractor
Celestron CPC 9.25-inch SCT







Losmandy GM-8

Purchased in 2015 for solar work and it has worked like a champ. This mount includes the direct drive and not the Gemini system.

I’ve added a few extras:

12″ pier extension (This is probably closer to 7 years old)
Robin Casady 8″ saddle (original saddle included)
11 lb counter weight
Additional 5lb Robin Casady stainless steel counterweight
Clutch knob set with handles (original knob set included)

The saddle and tripod have normal scuffs from wear and tear, but nothing major.

$1100 for a club member pickup.

Marcus Tuepker





Parks Tube and Williams Optics Focuser

1. Telescope tube – fiberglass made by Parks Optical. I used this for many years in my observatory with 12.5” F/6 Cave mirror.

Dimensions are: 69 in. L x 16 3/8” OD, 15 7/8” ID. In good shape but outer glass coating has some crazing that doesn’t effect performance, various NASA mission stickers some dirt, needs a good washdown with bleach. Has metal bands at each end. Partly lined with flocking inside, a number of holes for mirror cell mounting, fan and focuser have been drilled. I had some thoughts of putting a 14.5” mirror in this scope since its big enough but never did. I’m second owner, David Shouldice had it custom made by Parks. You may think its too short for an 12.5” f/6 mirror, but with a little ATM’g I made it work for many years. O.D. fits C-14 radius blocks for a Losmandy mounting plate exactly, which is what I did. These are really hard to find as no longer made or at great expense new. Will sell for $100 bucks or it may become a rain barrel for our garden. Will not ship. Pickup or arrange delivery in Front Range area or eastern mountains of CO.

contact Ron at this email; ursamajor_1@mac.com














D&G 6” f 14.6, Achromatic Refractor Optical Tube Assembly


  • Dew shield and lens cap.
  • Rack and pinion focuser for 1.25”/2” eyepieces.
  • 9 x 50 finder.
  • Losmandy dove tail plate.
  • four tube rings.
  • sliding counter weight for eyepiece balancing.


Contact Tim Pimentel, tim.pimentel@yahoo.com




New, Never Used Astro-Photography Equipment

Orion Atlas EQ-G Computerized GoTo Telescope Mount and Tripod: $1000 (retail $1399)

Astro-Tech 8″ f/8 Ritchey-Chrétien astrograph, carbon fiber tube: $1000 (retail $1395)

I live here in Denver and purchased this equipment last year.  I did examine everything but I was never able to use it due to degenerative arthritis.

Everything is still in the original box, but the warranty is not transferable.

Ron Birrell


Celestron CPC 800 XLT Computerized Telescope w/Tube and Tripod


8-inch Schmidt-Cassegrain telescope
2032mm focal length
Aluminum optical tube construction
Starbright XLT high performance optical system
The scope is in absolutely perfect shape and the Starsense and Wedge are brand new.


$2200 or best offer for everything displayed

Andi Poland

















8′ x 6′ Skyshed Roll-Off Roof Observatory


  • Very solid construction
  • Vapor barrier
  • Painted interior
  • Shelving
  • Hole and access panel for pier if desired
  • Laminate wood floors
  • 3 windows
  • Reflectix insulation & tar paper under metal roof
  • High quality stain

Additional construction details here:


The observatory was constructed to be able to move w/o much disassembly. Contact me if you have questions.
I can include the custom made steel pier for an additional $400. See picture of pier and telescope (telescope and equipment not included).

$3000 obo, pick-up only (price reduced!)

Contact Kyle at quantum64 (at) gmail.com











Pier (does not include mount or other equipment)



Astrophotography Equipment

Hypertuned Celestron CGE
I bought this used and immediately had it hypertuned by Deep Space Products due to some flexure I saw on one of the axes. I believe it’s ready to go, but I’ve not used it for imaging. I’ve put in over $1500 for this mount. I’m only asking $1300, since it has sat unused and hasn’t been tested (other than testing done by Deep Space Products).

Cables included
Minor crack in controller
I’ve been able to control this mount through the computer.


TPO 8″ f/8 Ritchey-Chretien Astrograph with added ADM Losmandy style dovetail
(Pictured focuser and guidescope not included)










Contact Kyle at quantum64 (at) gmail.com



Brand New Astro-Photography Equipment

Everything needed for an Astro-Photographer!!!
Never used, still in box, recently purchased.

Paid $3,042.00 Selling for only $2,800.00

Items located in Pueblo West, Co—so no shipping costs, just a short drive to pick up.
To view items look up on High Point Scientific Ida Rhodes 719-671-9263

  • Sirius Celestron VX Mount Soft Carry Case – Blue – No Foam – SCB-2224-100 SRT-SCB-2224-100
  • Celestron T-Adapter for C5 – C14 Telescopes – 93633-A CEL-93633-A
  • Orion Magnificent Mini AutoGuider Package – 24781 ORI-24781
  • Orion Finder Scope Dovetail Mounting Base for SCT – 07215 ORI-07215
  • Celestron 11 lb. Advanced Series VX Counterweight – 94286 CEL-94286
  • Celestron NexStar Case for 4″, 5″, 6″ and 8″ OTA – 94003 CEL-94003
  • William Optics Binoviewer W/Eyepieces & Barlow Nosepiece – E-BINO-P WYO-E-BINO-P
  • Celestron Nikon T-Ring for 35mm SLR Cameras – 93402 CEL-93402
  • Celestron Sky Maps – 93722 CEL-93722
  • Celestron X-Cel LX 3X Barlow Lens – 1.25″ – 93428 CEL-93428
  • Celestron Flexible Lens Shade for C6 & C8 SCT Telescopes – 94009 CEL-94009
  • Celestron 17AH 12 V Power Tank Portable Power Supply – 18777 – NEAF Demo CNP-CEL-18777
  • Celestron Lens Pen Optics Cleaning Tool 93575 CEL-93575
  • Celestron FireCel – Red – 93535 CEL-93535
  • Celestron f/6.3 Focal Reducer & Corrector – 94175 CEL-94175
  • Celestron Advanced VX Series 8″ Schmidt-Cassegrain Go To Telescope – 12026 CEL-12026
  • Celestron 5amp AC Adapter for CGE, CGEM, and AVX Mounts – 18780 – NEAF Demo CNP-CEL-18780
  • Celestron 1.25″ Eyepiece & Filter Kit With Aluminum Case – 94303 CEL-94303
  • FREE – Celestron Polar Scope for CG-5 Advanced & CGEM Mounts – 94224 CEL-94224






Celestron CI-700 Mount, Tripod, and Case

*(these are not aftermarket exposed encoders)

Blome_ci700Celestron CI-700 Mount Includes:

  • w/cables (functional but looking like they are ready to be refreshed)
  • + New encoder cables (2) from US Digital (encoder connector one end, fly leads other end. No RJ45 connector crimped yet))
  • Control Box
  • Includes 12v cable for cigarette lighter jack
  • Motor Drive Cables
  • Hand controller w/cable
  • Polar Scope
  • Original Owner’s Manual

Tripod (similar to and compatible with Losmandy HD tripod for G8 and G11)

  • Folding
  • Fixed length legs
  • w/spreader

blome_mount_caseAnvil Case for mount

  • The mount lives and travels in a custom case

$1200 for mount, tripod, and case.

Lots of pictures at: https://onedrive.liv…hint=folder,jpg

Contact: J120bowman at gmail dot com





4″ Unitron Photoequatorial Refractor

  • Electric clock driven mount,
  • 2.4″ guidescope, solar projection screen/rod,
  • Super Unihex and regular Unihex,
  • Unibalance,
  • camera mount,
  • 2 sets of 0.965″ Unitron eyepieces
  • 60 mm and 40 mm eyepieces for Unihex,
  • 2-1 1/4″ eyepieces,
  • Duetron, camera with plates (bulb not usable),
  • original boxes for everything except the mount head,
  • many extra tubes/adaptors 

All for $3800

Please contact Pete at pbrayton55@gmail.com 303 594-3072









Celestron CPC 9.25-inch SCT

Halpern_b_cpc_925I  am selling my Celestron CPC (9.25″) Schmidt-Cassegrain telescope. It is in excellent condition (purchased in April, 2009). It originally sat within my observatory on a hill behind my home in Boulder. We’ve since relocated and it’s simply not practical to use where I am now. It’s being sold “as is” but is in great shape and worked fine the last time I used it. Along with the scope comes all of the documentation materials, cords, controller, and accessories. This includes a solar filter (that covers the entire aperture of the scope), a moon filter and a UV filter, a Televue Nagler eyepiece as well as a few other eyepieces and a Barlow. Also a power tank for remote viewing, and a DSLR camera adapter (pictured). All of these items together originally sold for well over $3000.”

Price: $1700.00

Please contact Barry at barry.halpern[at]gmail.com




Guidelines for Submission

  • This classified section is intended for the use of DAS members only, to advertise items they want to sell. There is no charge.
  • Please limit your requests for listings to items that are associated with astronomy and space science.
  • Arrangements for shipping or transfer of the items shall be made solely by the buyer and seller.
  • The DAS has no liability for issues arising from the sale of any items. Advertisers have the right to refuse to sell items to any person.
  • If you have an item for sale and want it listed here, please paste the information into an email and send it to: webmaster@denverastro.org
  • Please provide an accurate description and sale price for each item. Specify model names and numbers where necessary. ATM items should be identified as such. The DAS reserves the right to refuse to advertise any item for any reason. The information will be formatted by the Webmaster as deemed appropriate.
  • Photos of sale items may be submitted; however, they must be in jpg or gif format and no more than 200KB in size. We reserve the right to edit submitted photos for fit or to not use photos that we consider unsuitable for publication.
  • Listings will be removed after 60 days unless the Webmaster is notified at the e-mail address above.