Astro-Physics
1600GTO Mount Options, Upgrades and Spare Parts

As time goes on, this page will outline a variety of options and spare parts for the 1600GTO German Equatorial Mount.

Flat Surface Adapter for 1600GTO and all 1200 Mounts (1612FSA)

As of July 2012 , the Flat Surface Adapter (formerly part # 1200FSA) has been upgraded to include four additional thru-holes for more secure attachment to a flat plate with the larger 1600GTO and its payload in mind. It also includes "N" and "S" engraving to ensure that the base of your mount will be oriented in the correct direction when it is inserted.

 

 

1600GTO
The base of the 1600GTO slips directly into the 1612FSA. There is no need for an extra pier adapter, as the 1600 incorporates the functionality of the Precision-Rotating Pier Adapter into its base. The extended latitude range of the 1600 also eliminates the need of a polar wedge.

1200 (all versions)
Use this adapter for these applications:

The 1612 Flat Surface Adapter is black-anodized, precision-machined aluminum.

Attach to flat surface
The Flat Surface Adapter bolts onto the flat surface on the top of your pier or tripod. Your pier's top plate should be a minimum of 9.75" in diameter. The 1612FSA itself is 10.345" in diameter. It adds 1.265" to the height of your mount.

The bolt circle for attaching the 1200 Flat Surface Adapter to your pier is 9.230" in diameter. Please refer to the PDF link provided on the diagram to the right for detailed information on attachment preparation.

The holes for mounting the 1612FSA to your flat surface are counter-bored to accept the head of standard ¼" socket head cap screws (13/32" or 0.406" diameter). This allows the 1600 base or 1200 Pier Adapter to sit in the Flat Surface Adapter without interference. Because installations will vary, we do not provide the screws for mounting the Flat Surface Adapter to your pier or tripod.

Attach to 1200 Hi-Lo Latitude Wedge
Match four holes and bolt the 1612FSA in place. Then, your Pier Adapter simply slips in (just as it fits into our pier) and you fasten from the side with the six screws and washers provided with the Pier Adapter for your 1200 mount.

Fasteners are not supplied.

Note: You may wish to consider purchasing our Flat Pier Plate with Flat Surface Adapter for 1600GTO and all 1200 Mounts (1612FSA-FP) if you are fabricating your own pier and need a flat plate to fit into the top. Some modification may be required to fit your pier I.D.

1612FSA$140.00 in stockAdd 1612FSA To My Cart

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Flat Pier Plate 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 System (ATS) 10" pier.  It is sized to fit directly into the pier without modifications and provide a mounting surface for our 10" Flat Surface Adapter (1612FSA) (previously 1200FSA).  It will add 0.75" to the height of the pier.

Owners of 1100GTO and 900 mounts will be pleased that additional holes have been drilled and tapped for our 8" Flat Surface Adapter (119FSA) (previously 900FSA).  This is of interest to imagers who are looking for the most robust and stable pier for their larger scopes setups. 

The bottom, pier-inserting portion of this plate has additional thickness to allow custom machining in order to fit a smaller inside diameter pier.  Please refer to the PDF schematic for dimensions.

Pier options:

  • Use with the 10" ATS pier (no modification required)
    The base of the 1612FP has already been machined per the specifications provided by ATS to fit into their piers without further modification.
  • Use with other piers (may require custom modification)
    Machine the bottom portion of this plate to fit the I.D. of your pier, if necessary. Please refer to the diagram to determine if your pier is suitable.

Top attachment options:

  • Attach 10" 1612FSA (use existing tapped holes)
  • Attach 8" 119FSA (use existing tapped holes)
  • Attach custom  mount adapter (machine custom tapped holes)

If you intend to attach an 1600GTO or older 1200 mount to the ATS pier, then it is best to choose the combination Flat Surface Adapter with Flat Pier Plate (1612FSA-FP).  It is a two-part adapter that combines both the 1612FSA and the 1612FP. 

Fasteners included:
1/4-20 x 3/4" (8) - attaches 1612FSA or 119FSA to Flat Pier Plate (1612FP)
5/16-18 x 5/8" (6) and washers - attaches 1612FP to ATS pier

Note:  Since the bottom of the flat plate is designed to fit into the 10" ATS Piers, the diameter (9.450") is too small to be used in the Astro-Physics 10" Portable Piers.

1612FP$220.00 in stockAdd 1612FP To My Cart

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Flat Surface Adapter with Flat Pier Plate for 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 interface the pier post with the base of your mount. You may also consider it if you are fabricating your own pier for either the 1600GTO or any 1200 mount. You do NOT need this adapter for the 10" Astro-Physics Piers.

This item is constructed of two machined aluminum parts bolted together - a thick flat plate and our Flat Surface Adapter for 1600GTO and 1200 Mounts (1612FSA). Since the bottom of the flat plate is designed to fit into the 10" ATS Piers, the diameter (9.450") is too small to be used in the Astro-Physics 10" Portable Piers. This adapter adds 2.015" to the height of the ATS pier.

The lower flat-plate section of this adapter is also drilled and tapped so that the 119FSA (formerly part # 900FSA) can be attached. This allows the 1100GTO and all 900 mounts to be attached to your 10" pier.

Use with 10" ATS Piers and 1600GTO

  • The base of the 1612FSA-FP has already been machined per the specifications provided by ATS to fit into their piers without further modification. The 1600GTO will fit directly into the top portion of the 1612FSA-FP.

Use for Other Piers and 1600GTO

  • Machine the bottom portion of this plate to fit the I.D. of your pier. The base of the 1600GTO will fit directly into the top portion of the 1612FSA-FP.
  • The Particle Wave Monolith will receive this adapter directly, provided that it has the reported 9.50" inner diameter specification.

Use for Other Piers and 1200 Mounts

  • Machine the bottom portion of this plate to fit the I.D. of your pier. Please refer to the diagram to determine if your pier is suitable.
  • These adapters for the 1200GTO will fit into the top portion: Precision-Adjust Rotating Pier Adapter (1200RPA), Standard Pier Adapter (1200SPA), or 1200 Hi-Lo Latitude Wedge (1200WDG or 1200WDGA).

Fasteners are supplied for attaching the 1612FSA-FP to ATS or other similar pier.

1612FSA-FP$350.00 in stockAdd 1612FSA-FP To My Cart

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Copyright © 2012, Astro-Physics, Inc. - All Rights Reserved
This page was last modified: November 15, 2017

Astro-Physics, Inc.
11250 Forest Hills Road, Machesney Park, IL  61115, U.S.A.
Phone: 815-282-1513   Fax: 815-282-9847