Mount Accessories

Right-Angle Polar Alignment Scope and Accessories Losmandy-Style Polar Alignment Scope and Accessories Tripods, Piers and Pier Accessories

Mounting Rings
Mounting rings attach to the cradle plate of the mount and hold your tube assembly firmly in place.
The tops of the rings are also flat which allows you to support your guidescope, camera or other accessories. The rings feature a hinged assembly with thumbscrew closure. They are felt-lined to prevent marring of your tube. Please order the size that corresponds to the outside diameter of your tube assembly.

Astro-Physics Rings

47RING - 130 mm Astro-Physics "Gran Turismo" refractor or other telescope tubes of 4.7" diameter; weight: 1.85 lb. (0.8 kg.)

55RING - 130 mm Astro-Physics refractors (except the "Gran Turismo" version) or other telescope tubes of 5.5" diameter

65RING - 140 mm f7.5 StarFire EDF and all 155mm and 160mm Astro-Physics refractors or other telescope tubes of 6.5" diameter

80RING2 - 175 StarFire EDF, 180 StarFire EDT/EDF, 206 StarFire EDF and other telescopes with 8.0" diameter tubes, pair.

80RING21 - 175 StarFire EDF, 180 StarFire EDT/EDF, 206 StarFire EDF and other telescopes with 8.0" diameter tubes, single ring.

Top of rings: Various tapped holes for GR4400 and GR34FB (guidescope rings), DOVE08 (8" dovetail plate), DOVE15 (15" dovetail plates), Dovetail Plates (SBD12 and SBD16) and Losmandy D series plates. The plates are used to attach accessories to the top of the rings.

Bottom of rings: Drilled and tapped for 1/4-20 screws. The hole patterns fit the 800 mounts, our Dovetail Plates (SBD12 and SBD16), our Ribbed Plates (900RP, 1200RP15 and 1200RP), our Flat Plates (FP1500 and FP1800) and the SBDAPB Riser Blocks.

Please click the illustration at left for a detailed schematic of the Ring Hole Patterns.

47RING$215.00 in stockAdd 47RING To My Cart
55RING$240.00 in stockAdd 55RING To My Cart
65RING$275.00 in stockAdd 65RING To My Cart
80RING2$450.00 in stockAdd 80RING2 To My Cart
80RING21$225.00 in stockAdd 80RING21 To My Cart
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Parallax Rings

Parallax Instruments is a great source for a variety of mounting rings for other scopes. Let Joe Nastasi know which mounting plate you plan to use and he will drill the hole pattern you need. If you are planning to use them with our mounting plates, specify the Astro-Physics hole pattern on the top and bottom of the rings. Please order the rings directly from Parallax Instruments.

There is a thumbnail of the hole pattern for our rings listed above. If you wish to see a detailed version of this diagram, please click here.


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Stainless Steel Counterweights
Our counterweights are precision machined from 303 stainless steel. A bronze sleeve is press fit into the center hole to prevent marring of your counterweight shaft as you adjust the position of the counterweights. The weights slip easily onto the counterweight shaft and are secured in position with a large hand knob/brass pin assembly. The brass pin will not mar your shaft.

Keep in mind that you can adjust the position of the weights to counterbalance varying loads. However, the addition of a guidescope, camera and other heavy accessories may necessitate an additional counterweight. If you plan to mount your catadioptric, Newtonian or any other scope, figure that you will need a counterweight total equal to approximately 90-110% of the weight of your tube assembly and accessories for 1100GTO and 1600GTO mounts (slightly less for older mounts). Below are the nominal weights and dimensions of our counterweight line.

Counterweights for 1.125" Shaft - 400, 600E, 800 and Mach1GTO mounts:
Use these dimensions to determine how many counterweights will fit on each shaft:
6 lb. Counterweight (6SLCWT) - diameter: 5", thickness 1.1"
9 lb. Counterweight (9SLCWT) - diameter: 5", thickness 1.8"
Mach1GTO Counterweight Shaft (M8084-A) - usable length 13.6"

For 400, 600E and 800 mounts, measure the length of your shaft.

6SLCWT$95.00 in stockAdd 6SLCWT To My Cart
9SLCWT$115.00 in stockAdd 9SLCWT To My Cart

Counterweights for 1.875" Diameter Shaft - 900, 1100, 1200, 1600 mounts (and Mach1GTO using optional shaft):
Use these dimensions to determine how many counterweights will fit on each shaft. Note that the diameter of the 24 lb. counterweight is larger than the others:
5 lb. Counterweight (5SCWT) - diameter: 6", thickness: 0.75"
10 lb. Counterweight (10SCWT) - diameter: 6", thickness: 1.4"
18 lb. Counterweight (18SCWT) - diameter: 6", thickness: 2.5"
24 lb. Counterweight (24SCWT) - diameter: 6.8", thickness 2.5"
900/1100 Counterweight Shaft (M9404-A) - usable length 12.875"
1200/1600 Counterweight Shaft (M12601-D) - usable length 18.5"

5SCWT$110.00 in stockAdd 5SCWT To My Cart
10SCWT$135.00 in stockAdd 10SCWT To My Cart
18SCWT$190.00 in stockAdd 18SCWT To My Cart
24SCWT$260.00 in stockAdd 24SCWT To My Cart

Counterweight for 2.5" Shaft - 3600GTO and 3600GTOPE mounts:
Information pertaining to these counterweights is on the 3600GTO webpage.



Astro-Physics Counterweight Shaft Options

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Key Pad Protector (KEYPRO)

The KEYPRO keypad protector (shown with the keypad so that you can see how it fits) is a heavy-duty molded rubber casing with a full 1/4" thickness on all impact surfaces. If you accidentally drop your keypad, the rubber casing will absorb much of the blow. Your display, keypad, electronics and the case itself will be protected from damage. In addition, the rubber prevents the keypad from sliding when placed on a table or other flat surface and the keypad will feel secure in your hands as you observe. The KEYPRO also offers protection during transport and storage.

The black case is designed with cutouts for the cable and retractable hanger.

The keypad protector is now included with the 900GTO, 1100GTO, 1200GTO, 1600GTO and Mach1GTO .

KEYPRO$59.00 in stockAdd KEYPRO To My Cart
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Right-Angle Polar Alignment Scope with LED Illuminator - 1100GTO, 1600GTO, Mach1GTO, 900 and 1200 Mounts (RAPAS)
This revolutionary design has been enthusiastically praised for its ease of use and accuracy by customers in both the northern and southern hemispheres. See a larger image of the reticle.

Advantages of the Right-Angle Polar Alignment Scope:

  • Right-angle viewing eliminates neck strain during polar alignment.
  • Reticle suitiable for Northern and Southern Hemispheres through 2040.
  • Precise adjustments are made without rotating the Polar Alignment Scope or the Right Ascension axis.
  • Polar Align in light polluted areas (only Polaris needs to be seen)
  • Battery-powered Illuminator with adjustable brightness control.
  • Easily interchange between all of your Astro-Physics mounts that have the appropriate backplate/adapter.
Optical Specs:
  • Objective lens: 200 mm FL, 25 mm diameter
  • Eyepiece: 22 mm Widefield Orthoscopic, focusing ocular
  • Field of view: 6 degrees
  • Right-angle prism diagonal

Methods to Determine Position of Polaris on Reticle:

Use with these Astro-Physics mounts:

  • 1100GTO and 1600GTO - All mounts (including those with absolute encoders) include the appropriate backplate to use the RAPAS.
  • Mach1GTO - All mounts shipped beginning in 2014 (serial number M10670 and later) will have the adapter for the Right-Angle Polar Alignment Scope built in. Mounts shipped in prior years must purchase the Right-Angle Polar Alignment Scope Adapter for Mach1GTO (RAPM1), shown below, separately.
  • All versions of the 900 mount - must purchase the Right-Angle Polar Alignment Scope Adapater for 900 Mounts (RAP900) described below
  • 1200 mounts (except the original 1200 black version and the 1200DA) - must purchase the Right-Angle Polar Alignment Scope Adapater for 1200 Mounts (RAP1200) described below
  • 400, 600 and 800 mounts - the larger aperture of this polar alignment scope can not be adapted to the smaller shaft diameters of the 400 and 600 mounts.
 

In order to obtain extreme precision, it will be necessary to perform a precise polar alignment using a traditional drift alignment (visually or with CCD camera), or by using Ray Gralak’s PEMPro / Polar Align Wizard the first time that the RAPAS is used. Once the alignment is spot-on, the push/pull adjustment screws on the adapter are used to orient Polaris into its specific location on the reticle.

RAPAS$390.00 late OctoberAdd RAPAS To My Cart
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Right-Angle Polar Alignment Scope Adapters for the Mach1GTO and all 900 and 1200 Mounts

Our Right-Angle Polar Alignment Scope can be used with the Mach1GTO and all 900 and 1200 mounts (except the original black version) when used with the appropriate mount adapter. Each mount type has its proprietary adapter. Additionally, if you have more than one of the same mounts, each will require its own adapter. It is important to note that the adapters will add some dimension to the back of your mount which, if you have a carrying case, will require a small modification to the foam liner.

 

These adapters are push/pull adjustable for precise alignment. Once adjusted, they will retain their precision, allowing the polar alignment scope to be inserted and removed as needed (the adapter, itself, remains attached to the mount). This will also allow the polar scope to be used interchangeably with each of your mounts without further adjustment. The adapter’s alignment is what allows this precision polar alignment scope to provide consistent accuracy when re-installed repeatedly with either a single mount or when used with many different mounts. 

 

In order to obtain extreme precision, it will be necessary to perform a precise polar alignment using a traditional drift alignment (visually or with CCD camera), or by using Ray Gralak’s PEMPro / Polar Align Wizard the first time that the RAPAS is used. Once the alignment is spot-on, the push/pull adjustment screws on the adapter are used to orient Polaris into its specific location on the reticle. For additional information see the Right-Angle Polar Alignment Scope.

     

Right-Angle Polar Alignment Scope Adapter for Mach1GTO (RAPM1) Includes the cap (# M16106-A). Click mount image for larger view.

Note: This adapter is not needed for the Mach1GTO mounts shipped beginning in 2014 (serial number M10670 or later).
RAPM1$80.00 in stockAdd RAPM1 To My Cart


Right-Angle Polar Alignment Scope Adapter for 900 mounts (RAP900) Includes the cap (# M16106-A). Click mount image for larger view.

Special note regarding a select few 900 mounts:
Please check this linked photo to see if your 900
mount can be fitted with the RAP900 Adapter:

At the time of 900GTO mount production, the orientation of the RA axis rear plate’s three attachment screws was not mechanically relevant.  Consequently, there were some mounts produced that did not have their screw placement as shown in the linked photo.  These mounts cannot use the RAP900 / RAPAS as sold.  In some cases it may be possible to contact a machine shop and custom modify the RAP900 to remedy the problem.  You will need to contact our technical support department for specific information. 

RAP900$80.00 in stockAdd RAP900 To My Cart

Right-Angle Polar Alignment Scope Adapter for 1200 mounts (RAP1200) Includes the cap (# M16106-A). Click mount image for larger view.
RAP1200$80.00 in stockAdd RAP1200 To My Cart

The cap shown below is very convenient when transporting the mount, or if you wish to remove the polar scope after initial use. It provides protection and prevents dust or little critters from entering your mount's interior. It is included with the polar scope adapters above.

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Cap for Right-Angle Polar Scope Adapter (M16106-A)

We are making this cap available separately as a spare in case you lose the one included with the Right Angle Polar Scope Adapters offered above. We all have experienced the loss of small objects during the course of star parties and late night viewing sessions. Here is your chance to have a spare. It is included with the adapters above.

M16106-A$30.00 in stockAdd M16106-A To My Cart
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Losmandy Polar Alignment Scope - 400, 600, 600E, 800, 900, 1200, Mach1GTO (PASILL4)

PASILL4 shown with battery pack and pouchPASILL4 shown with CABPAS3

The updated Losmandy polar scope will allow you to quickly align your mount on the pole stars to ensure greater tracking accuracy throughout your observing session. The reticle was designed for use in both the Northern and Southern hemispheres.

The updated reticle is marked for epochs 2005 through 2030 and has been improved for users in the southern hemisphere. Even users of the GTO computerized mounts will find these polar scopes useful, particularly if your telescope is not orthogonal to the mount.

The unit threads into the base of the polar axis of all past and present models of the 400, 600, 600E, 800, 900, 1200 and Mach1GTO German Equatorial heads (except the first black 1200 mounts that were produced). The illuminator, with red LED, allows you to see the reticle at night. It can be powered three ways:

Parts included: Polar alignment scope with two covers, reticle illuminator with short cable, battery pouch with two AA batteries, 27.5" cable to power the reticle from your mount (CABPAS3 or CABPAS4), 0.9mm wrench.

PASILL4$230.00 in stockAdd PASILL4 To My Cart
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Losmandy Polar Alignment Scope for 1100GTO and 1600GTO (PASILL4-179)

This Polar Alignment Scope is identical to the PASILL4, except that the adapter was designed specifically for the 1.79" opening of the 1100GTO and 1600GTO. Please read the description and see the photos above above for more information and included items.

See included items above.

For comfort and convenience, you may wish to consider the Right-Angle Polar Alignment Scope.

PASILL4-179$230.00 in stockAdd PASILL4-179 To My Cart
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AstroElectric Polar Scope Dimmer Controller (AEDIM)




This battery-powered controller unit by AstroElectric powers the illuminator for your Polar Alignment Scope and allows you to adjust the LED brightness. It can be used with the PASILL4L or PASILL4L-179 if you don't wish to power your illuminator from the mount's control box.

You can also use it to replace the battery pack that was included with the PASILL4 and PASILL3 (earlier Polar Scope versions). No more hassle trying to determine which polarity cable you need. One of the jacks on the top of the controller has standard polarity; the other has reverse polarity. If your LED doesn't light while plugged into one jack, try the other.

Parts included: Two"AA" batteries. Velcro strips.

AEDIM$34.00 in stockAdd AEDIM To My Cart
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Polar Alignment Scope Covers - 400, 900, 1200 Mounts (Q9700, Q12700)

These covers allow you to keep your Polar Alignment Scope protected while remaining threaded in your mount. They were designed to work with all models of the polar alignment scopes that we have offered except the earliest PASILL and our upcoming Right-Angle Polar Alignment Scope. If you are uncertain which model polar scope you have, please compare yours with those pictured on this Polar Scope Identification page.

The Q9700 has a slightly larger thread diameter than the Q12700 and accomodates:
  • all 900GTO mounts shipped since October 2005
The Q12700 works on the following mounts:
  • all 400 mounts
  • all 1200 mounts, except the original black, metric mount
  • all 900 mounts shipped prior to October 2005



Q9700 attached on the 900GTO

A scribe line has been carved into outer diameter of the bell of the Q12700 to differentiate it from the Q9700. If you have an older AND a newer 900GTO, knowing which cover belongs to what mount is easy!

These covers were tested on current 900 and 1200 model mounts, both constructed with their respective taller polar fork assemblies. You may wish to review the images for the 900 Polar Fork Assembly (S900PF-A) and the 1200 Polar Fork Assembly (S1200PF-B) to confirm which version is installed on your mount.


If you reside where your mount is set to the highest latitude setting (52-68 degrees for the 900, 57-69 degrees for the 1200 mount) and you have the shorter polar fork, you may have clearance issues while installing and removing this part. We did not have either mount available in this configuration during our testing phase. However we have provided a scale diagram that you can use to determine whether you will encounter interference in your current latitude setting. Please print the Polar Scope Cover Illustration at 100% to cut out and use as a test piece.

We do not expect that customers using the Hi-Lo Wedge for Latitudes from 0-22 or beyond 68 degrees will experience a conflict with either polar scope cover and their mount in that configuration.

If you are uncertain when your 900GTO shipped, please use the photos (right) as a reference for where to measure on your mount to determine the correct cover size. We used a 1200GTO since it was readily available; however, the measurement points are identical on older 900 mounts.

Note that all LEDs and illuminator units must be removed from the polar scope before installing these covers.

Specifications:
  • Weight: 0.5 lbs each

  • For more detailed information regarding the measurements of these parts, please refer to the Polar Scope Cover Illustration.

    Q9700$65.00 in stockAdd Q9700 To My Cart
    Q12700$57.00 in stockAdd Q12700 To My Cart

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    Cable for Losmandy Polar Alignment Scope - for PASILL3 or PASILL4 version (CABPAS3 or CABPAS4)

    The CABPAS3 and CABPAS4 cables look identical, however the CABPAS3 cable is wired to work with a reverse polarity LED cable. It was necessary to make two different versions because the LED cables that the manufacturer provided with our PASILL3 and PASILL4 were not wired in a consistent manner. Some were wired with normal polarity and others were wired with reverse polarity. When the polar scopes were originally shipped to customers, we provided the correct cable to match your LED cable. Please refer to the Losmandy Polar Scope Polarity Test Instructions to help you determine which cable you have. If you need a replacement cable for your PASILL3 or PASILL4 Polar Alignment Scope, there are several options to consider.

    If you plan to use the original battery pack that came with your polar scope and your polar scope has reverse polarity: You will need the CABPAS3.

    If you plan to use the original battery pack that came with your polar scope and your polar scope has normal polarity: You can use the CABPAS4.

    The 800 mount requires part #E0187 (RCA phono to 3.5mm adapter).

    CABPAS3 - Cable for Polar Alignment Scopes with reverse polarity LED - for PASILL3 and some PASILL4. Plugs directly into reticle output on mount (part #E0187 required for use with 800 mounts).

    CABPAS4 - Cable for Polar Alignment Scopes with normal polarity - for some PASILL4. Plugs directly into reticle output on mount (part #E0187 required for use with 800 mounts).

    Click here for photos and illustrations that will help you to identify which polar scope you have.

    CABPAS3$35.00 Call Contact Astro-Physics about CABPAS3
    CABPAS4$35.00 Call Contact Astro-Physics about CABPAS4
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    Cable for Polar Alignment Scope for previous PASILL2 version (CABPAS)

    The CABPAS cable enables you to power the PASILL2 Polar Alignment Scope (previous version, sold from January 2001 to July 2002) directly from the reticle output on your 400, 600, 600E, 800, 900, 1100, 1200, 1600 or Mach1GTO mount. The 800 mount requires part #E0187 (RCA phono to 3.5mm adapter). This method allows you to control the brightness level with the keypad (GTO mounts) or controller (non-GTO mounts) and it frees you from relying on batteries.

    Click here for photos and illustrations that will help you to identify which polar scope you have.

    CABPAS$35.00 in stockAdd CABPAS To My Cart
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    Losmandy Polar Alignment Scope Adapter for 1100GTO, 1600GTO and some Mach1GTO Mounts(Q16030)

    Note: The Q16030 is shown as silver for easy identification. It is annodized black as a finished product.

    If you own a 1100GTO, 1600GTO or some Mach1GTO mounts and wish to use the PASILL4, PASILL4L or PASILL3 that you already own, you will need to substitute this adapter for the one that originally came with your Polar Alignment Scope. It was designed to be thread into the 1.79" diameter opening on the back plate of the 1100GTO, 1600GTO and some Mach1GTO mounts (those shipped beginning 2014 with serial number M10670 or later).

    When purchasing a new Losmandy Polar Scope a PASILL4-179 version can be purchased which already includes this adapter.

    Please note that we cannot guarantee that the adapter will fit all Losmandy polar scopes from prior years.

    Q16030$50.00 in stockAdd Q16030 To My Cart
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    Losmandy Polar Alignment Scope Adapter for 400, 600, 600E, 800, 900, 1200, Mach1GTO (Q8140-A)

    Note: The Q8140-A is shown as silver for easy identification. It is annodized black as a finished product.

    If you own a 400, 600, 600E, 800, 900, 1200 or Mach1GTO mount and wish to use a Losmandy Polar Alignment Scope that you already own, you will need to use this adapter with your Polar Scope. It was designed to adapt the scope to the AP thread size.

    When purchasing a new Losmandy Polar Scope a PASILL4 version can be purchased which already includes this adapter.

     

    Please note that we cannot guarantee that the adapter will fit all Losmandy polar scopes from prior years.

     

    Q8140-A$45.00 in stockAdd Q8140-A To My Cart
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    Polar Alignment Scope Plug (M4037)

    This adapter threads into the rear of the right ascension axis of the mounts specified below to allow use of the Polar Alignment Scope (these models - PASILL, PASILL2, PASILL3, PASILL4 or PASILL4L). Some 400 mount models require this part to attach encoders as well as the polar scope. This is one of the most common items to be misplaced and we maintain an extra stock if you have lost yours.

    NOTE: Do not order this part if placing a new mount order (already included when needed).

    Mounts: Most 1200 mount models (except the original black 1200DA models), all 900 mount models (HDA, QMD, SMD and GTO). It is also used in some 400 mount models that have been produced.

    M4037$21.00 in stockAdd M4037 To My Cart
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    10K-Step Mounted Shaft Encoders, 10K-Step

    Our mounted encoders will allow you to use digital setting circles with your Astro-Physics mounts. The 10,000-step encoders are enclosed in machined aluminum housings that were designed to look like an integral part of your mount, rather than an after-market add-on. The encoders read the movements of the shaft directly. One encoder is mounted securely to the declination axis just above the counterweight shaft and the other to the polar axis housing.

    You can upgrade previous models of our 400, 600E, 800, 900 and 1200 German Equatorial Mounts (see exceptions below). If you have a GTO model mount, you will not need these encoders since the encoders built into your servo motors are much more accurate. However, it is possible to use them, if you wish.

    ENC10-400   - 10K-Step Encoders for previous models of 400 mount
    ENC10-600  - 10K-Step Encoders for previous models of 600E mount (cannot be used with some early models, please call before purchasing)
    ENC10-900    - 10K-Step Encoders for previous models of 900 mount (cannot be used with 900GTO mounts shipped October 2005 or later, serial numbers 900451 or larger (with the exception of 900501, which can use the encoders))
    ENC10-1200  - 10K-Step Encoders for previous models of 1200 mount (cannot be used with 1200GTO mounts shipped May, 2006 or later, serial numbers 1200572 or larger).
    ENC10-800    - 10K-Step Encoders for previous 800 model (cannot be used with some early models of the 800 mount, please call before purchasing)

    ENC10-400$450.00 in stockAdd ENC10-400 To My Cart
    ENC10-600$450.00 in stockAdd ENC10-600 To My Cart
    ENC10-900$450.00 in stockAdd ENC10-900 To My Cart
    ENC10-1200$450.00 in stockAdd ENC10-1200 To My Cart
    ENC10-800$450.00 in stockAdd ENC10-800 To My Cart
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    This page was last modified: August 20, 2014

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