All Products

Astro-Physics

Cable for Polar Alignment Scope with reverse polarity LED - for PASILL3 and some PASILL4 (CABPAS3)

The following historical information is provided for your reference.  The CABPAS3 and CABPAS4

Astro-Physics

Cable for Polar Alignment Scope for prior PASILL2 version (CABPAS)

The following historical information is provided for your reference. The CABPAS cable enables you t

Astro-Physics

Machined Safety Stop Knob. 5/16"-18 thread - For 1.125" Diameter Counterweight Shafts. (MSSKB)

You asked for it … now we’ve got it! The Mach1GTO’s counterweight shaft is now &

Astro-Physics

Cover for Back of RA Axis for 900 Mounts Shipped Before October 2005, all 400 and most 1200 Mounts (except original black metric version) (M12666)

This cover was discontinued 03-22-19 after the last one was sold.    The following histo

Astro-Physics

Polar Alignment Scope Plug Adapter (M4037)

This adapter threads into the rear of the right ascension axis of the mounts specified below to allo

Astro-Physics

Flat Surface Adapter with Flat Pier Plate - 1100GTO and all 900 Mounts - for 8" ATS and other non-Astro-Physics piers (119FSA-FP)

If you are ordering a 8" ATS pier for your 1100GTO, you will need to order this adapter to interface

Astro-Physics

Flat Pier Plate for 1100GTO and all 900 Mounts - for 8" ATS and other non-Astro-Physics Piers (119FP)

This Flat Pier Plate (119FP) has been machined to the specifications of the Advanced Telescope Syste

Astro-Physics

16.975" x 1.875" Diameter Counterweight Shaft , Stainless Steel- 1100, Mach2, Mach1, 1200, 900 (see exception) (M9404-B)

This is the current shaft for 1100 and 900 mounts. It can also be used as an optional "heavyweight"

Astro-Physics

22" x 1.875" Diameter Stainless Steel Counterweight Shaft - 1600, 1100, 1200 (all models), 900 (see exception). (M12601-E)

Like its predecessors, this 1.875" diameter counterweight shaft is precision machined from solid 303

Astro-Physics

Flat Surface Adapter -attach 1100 Mount or 900 Pier Adapter and Wedge to a flat surface (119FSA)

The 8” Flat Surface Adapter (119FSA) allows the 1100GTO Mount and all versions of the 900 Moun

Astro-Physics

Polar Scope Cover for 900GTO Mounts shipped since October 2005 (Q9700)

These covers allow you to keep your Polar Alignment Scope protected while remaining threaded in your

Astro-Physics

Cover for Back of RA Axis for 900GTO Mounts shipped since October 2005 (M9403)

This sight hole cover threads onto the back of all 900GTO mounts shipped since October 2005. The re

Astro-Physics

5/16-24x1/2" Flat Point Set Screw to Use in Place of RA Clutch Knobs-900 Mounts (F0021)

If you operate your mount remotely and are concerned about cables snagging on the RA clutch knobs, y

Astro-Physics

Altitude Adjuster Assembly for 900 Mount, all models (9ALKIT)

Individuals who own the very earliest 900 mounts may want to consider upgrading to this more substan

Astro-Physics

Altitude Adjuster Brace for 900 Mount, all models (9ALBKIT)

If you do not wish to replace the entire Altitude Adjuster Assembly with 9ALKIT, you may wish to con

Astro-Physics

11.5" Counterweight Shaft Extension - 3600GTO, 2.5" Diameter (M3655)

This 2.5" diameter extension is beautifully machined from the same 303 stainless stock as the full c

Astro-Physics

Flat Surface Pier Adapter for 3600GTO Mount (3600FSA)

This pier adapter is no longer available. The following historical information is provided for your

Astro-Physics

Replacement for 900/1200 Dovetail Knob (DOVEKREP)

Astro-Physics

Flat Surface Adapter with Flat Pier Plate - 1600GTO and all 1200 Mounts - for 10" ATS and other non-Astro-Physics piers (1612FSA-FP)

If you are ordering a 10" ATS pier for your 1600GTO, you will need to order this adapter to interfac

Astro-Physics

Polar Fork Assembly for 1200 Mount, all models (S1200PF-B

The height was increased by 3/4" (19mm) to allow more room for your hand when tightening the rear kn

Astro-Physics

Modified R.A. Clutch Set Screw for 1200 Mount, all models (M12668)

If you operate your mount remotely and are concerned about cables snagging on the RA clutch knobs, y

Astro-Physics

Engraved Name Plate for 1200GTO (M12611E12G)

Engraving on the name plate has been changed to "Astro-Physics 1200GTO Servo Drive". The original SM

Astro-Physics

1200 R.A. Motor Bracket with Spring-Loaded Action (12SLBR)

As of 03-30-21, this item is out of stock and will no longer be produced due to the high cost of mak

Astro-Physics

1200 Declination Motor Bracket with Spring-Loaded Action (12SLBD)

The Declination Motor Bracket is no longer available.  The following historical information is

Astro-Physics

Pier Adapter Knob Kit for 1200 Mounts (12KBKIT)

This kit contains four machined and black-anodized Pier Adapter Knobs and 5/16 " ID x 1.5" OD flat w

Astro-Physics

Altitude Adjuster Assembly for 1200 Mount, all models (12ALKIT)

Individuals who own the very earliest 1200 mounts may want to consider upgrading to this more substa

Astro-Physics

Flat Pier Plate - 1600GTO and all 1200 Mounts - for 10" ATS and other non-Astro-Physics Piers (1612FP)

This Flat Pier Plate (1612FP) has been machined to the specifications of the Advanced Telescope Syst

Astro-Physics

Flat Surface Pier Adapter to attach 1600GTO, 1200 Pier Adapters or Wedge to a flat surface (1612FSA)

As of July 2012 , the Flat Surface Adapter (formerly part # 1200FSA) has been upgraded to include fo

Astro-Physics

Polar Scope Cover - 900 Mounts Shipped Before October 2005, all 400 and most 1200 Mounts (except original black metric version) (Q12700)

These covers allow you to keep your Polar Alignment Scope protected while remaining threaded in your

Astro-Physics

1100GTO Dec Top Plate (S1100DTP-A)

Customers have found the Dec Top Plate to be very convenient when wanting to quickly change out scop

Astro-Physics

Keypad Extension Cable (CABKEY--)

Custom Keypad extension cables are available by special order if you desire additional length. 

Astro-Physics

24" Extension Between GTO Control Box and Y-Cable for Mach1GTO (CABGTOR24)

People who wish to use one of our Control Box Adapters (CBAPT) in a lower position on the 6" EAGLE A

Astro-Physics

Rugged Rubber GTO Keypad Protector (KEYPRO)

The KEYPRO keypad protector (shown with the keypad so that you can see how it fits) is a heavy-duty

Astro-Physics

Set of Covers and Plugs for GTO Control Boxes (CONCOVS)

Set of covers for all GTOCP4 receptacles. connectors.  Can also be used for receptacles of othe

Astro-Physics

90-Degree Dovetail Adapter Plate for 900/1200 RA- mounted GTOCP4 (CBA912KIT)

If you wish to mount the GTOCP4 between the forks and use the original Y-cable supplied with the mou

Astro-Physics

Y-Cable for 900GTO Mount -for Pier-mounted GTOCP4, GTOCP3 or GTOCP2 Control Boxes (SGYCR2345)

We recommend this cable if have a 900GTO and your GTOCP4 is mounted on the Control Box Adapter (CBAP

Astro-Physics

Y-Cable for 900GTO Mount with GTOCP4, GTOCP3 or GTOCP2 Control Boxes that are mounted on the RA housing (S900GYCR)

If you are upgrading your 900GTO from the GTOCP1 Control Box and plan to mount the control box on th

Astro-Physics

900GTO Quick Release Control Box Adapter Kit - upgrade from GTOCP1 Control Box (9CBKIT)

If you are upgrading your 900GTO from the GTOCP1 and plan to attach the new control box to the RA ax

Astro-Physics

3600GTOPE Cable From Precision Encoder to GTOCP4 (CAB36PEF)

If you have the precision encoder version of the 3600GTOPE mount, the cable that attaches the encode

Astro-Physics

30 " Cable to Connect Limit Switch Connector on 3600GTO Cable Port Plate to GTOCP4 (CAB36LS4)

This is the correct cable to connect a GTOCP4 control box to limit switches installed on your 3600GT