Astro-Physics

Astro-Physics

9.25" x 1.875" Diameter Counterweight Shaft Extension, Stainless Steel (M12675)

The 8.5" Counterweight Shaft Extension completes the current 1.875" diameter counterweight shaft ens

Astro-Physics

14.5" x 1.125" Diameter Counterweight Shaft, Stainless Steel (M8084-B)

This is the standard shaft that is shipped with the Mach1GTO. It is the same diameter - 1.125" - and

Astro-Physics

Y-Cable for Mach1GTO Mount (SM1GYCR)

It is always a good idea to have a backup Y-cable for your mount. This is particularly true for any

Astro-Physics

Mach1GTO Precision-Adjust Rotating Base/ Hi-Res Azimuth Adjuster Upgrade Kit (M1RAUP)

The Mach1GTO Precision-Adjust Rotating Pier Base / Hi-Res Azimuth Adjuster is standard on new mounts

Astro-Physics

10.7" x 1.875" Diameter Counterweight Shaft, Stainless Steel (M1053-A)

As of 02-03-21, this counterweight shaft has been discontinued. If you are in need of a 1.875" diame

Astro-Physics

8' Locking Power Cable with a locking connector for GTCOP1, GTOCP2, GTOCP3 and other applications in the description (CABLPF)

RECOMMENDED ALTERNATIVE Beginning in November 2020, we now offer a power cable set with Powerpole c

Astro-Physics

37" Dec Cable for GTOCP1 and SMDCP1 Control Boxes of 1200GTO or SMD, 900GTO or SMD (SRDC37)

This 37" replacement cable is available if you damage or lose yours. Mounts that can use this cable:

Astro-Physics

12" RA Cable for GTOCP1 and SMDCP1 Control Boxes of 1200GTO or SMD, 900GTO or SMD (SRDC12)

This 12" replacement cable is available if you damage or lose yours. Mounts that can use this cable:

Astro-Physics

3600GTO Cable to Connect Limit Switch Connector on Cable Port Plate to GTOELS (CAB36LS)

This cable is needed if you plan to control your Limit Switches with the GTOELS Control Box.

Astro-Physics

Limit Switch System for 3600GTO, requires GTOCP4 (36LSS)

Optional switches can be installed to control operation past the meridian and for homing. The Limit/

Astro-Physics

Y-Cable w/42" Declination Length for 1100 Quick Release Servo Box (S1100GYCR42)

This is a custom cable for the 1100GTO (without Absolute Encoders) that is used when setting up the

Astro-Physics

Losmandy Polar Alignment Scope Adapter - for all past and present models of 400,600,600E,800,900 and 1200 mounts (except the first black metric mounts) (Q8140-A)

If you own a 400, 600, 600E, 800, 900, 1200 or Mach1GTO mount and wish to use a Losmandy Polar Align

Astro-Physics

Losmandy Polar Alignment Scope Adapter for 1100 & 1600 mounts (Q16030)

If you own a 1100GTO, 1600GTO or some Mach1GTO mounts and wish to use the PASILL4, PASILL4L or PASIL

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