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Price Drop, Astro-Physics AP900-CP3 Mount & Portable Pier

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I have decided to end my astrophotography hobby.  I am selling the three elements of my setup separately (Planewave CDK 12.5, Astro-physics AP900 and SBIG 11000m/FW8).


This is the mount.  It was purchased used in 2007 from Jim Schenz on Astromart. It was a 2004 model and he was the original owner.


The mount included the following:

2004 model AP900GTO mount serial# 900322

- Hand controller with rubber protector

- Standard length counterweight shaft

- Two counterweights, 18 lb and 10 lb

- Astro-Physics DOVELM saddle to accept Losmandy dovetail plates

- Standard 12v power cable and Y-cable for RA/DEC drives

- A-P 8X48/42 Portable Pier (two tubes for the two heights)


Over the next few years I bought the following upgrades for the mount:





18lb counterweight




Older Style 19.5" Counterweight Shaft (M12601-B)




Declination upgrade

  • Add new thrust bearing to the Dec worm wheel
  • Add preload system to shaft bearings
  • Add spring-loaded motor box bracket
  • Modify the worm bearing support and adjust preload
  • Set all preloads to factory specifications
  • Re-grease worm wheel and motor reduction gears
  • Test the fully assembled Dec. axis for precise reversal motion




Controller upgrade




Precision-adjust Rotating Pier Adapter






My asking price is $6000 (I paid $10,150).  Buyer pays shipping from zipcode 03063 in Nashua, NH.  I estimate the weight of the mount, counterweights and pier to be roughly 150lbs.


This mount is an excellent fit for my Planewave telescope and it has been a joy to use. It has always resided in my garage when it was not rolled onto my driveway for imaging.


My most recent reprogramming of the periodic error in aug-2017 yielded these results. The post correction error was a small fraction of an arcsecond.

Here is my last image of M27 from that same timeframe.