Markless™ Astronomics

Accessories for Big and not-so-Big Dobs

  1. Glatter Sling Installation

  2. Sling Extension Assembly

  3. Field Installation of ServoCAT™ and ServoCAT, Jr.™ ... by Markless™ Astronomics

  4. Ground Board Repair

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Glatter Sling Installation on Obsession Telescopes

... by Markless Astronomics.

PRICES SHOWN ARE FOR INSTALLATION ONLY, unless otherwise specified.   Materials, packaging, shipping, and handling are not included.   Installation prices may vary by telescope brand or size due to different configurations.   Material costs, packaging, shipping, and handling costs are in addition to prices shown.   Shipping and handling costs are based upon the weight and size of your containers and the destination.

Full installation, without extensions (see below), $90.   (Does NOT include the Glatter Sling.)

The Howie Glatter Sling is a fantastic mirror sling for big Dobs.   Once installed and adjusted, and the primary mirror is collimated, the optical axis of the primary mirror is coincident with the mechanical axis of the OTA and it will stay that way!   The Glatter Sling eliminates mirror movement from the center of the mirror box and keeps the optical axis perpendicular to the plane of the mirror box.

Installation of the Glatter Sling is a one time task, but it is not simple and requires time and patience.   However, it is well worth the effort.   In addition, some telescopes might require relocation of the sling support bolts to a position a little higher on the mirror cell frame, requiring construction and installation of extensions, one of which may be seen in the above photograph.   At the time of this writing, only the Obsession 15 is known to require the extensions.   The relocation is needed in order to prevent the mirror from contacting the linear bearings as the mirror is raised to its center position in the mirror box.   Without the extensions, the mirror cannot be centered top-to-bottom in the mirror box.   It also is known that the Obsession 20 and 25 do not require extensions.

Email me to start a discussion or make a reservation, and/or order extensions for your telescope (see below): cs(at)marklessastronomics dot com

Charles Starks, Charlotte, NC

Prices subject to change without notice.

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Sling Extension Assembly

... by Markless Astronomics.

Markless Astronomics has designed and fabricated an extension design similar to the A. French approach for the extensions and offers them for sale, if needed, for your own installation, or if you have us install it.   The extensions are 100% steel and are very heavy duty.   Each extension consists of two machined plates, machined spacer tube, and stainless steel attachment bolt, washers, and nut.   These extensions are required on an Obsession 15 Classic if you intend to center the mirror within the mirror cell.

The price for a set of two extensions is $40.   Installation of the extensions at our location by Markless Astronomics, if desired, is $20.   Glatter Sling, not included.

Email me to order extensions for your telescope: cs(at)marklessastronomics dot com

Charles Starks, Charlotte, NC

Prices subject to change without notice.

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ServoCAT™ and ServoCAT™Jr. GoTo and Tracking system installation

... by Markless Astronomics.

 

PRICES SHOWN ARE FOR INSTALLATION ONLY.   Materials, packaging, shipping, and handling are not included. Installation prices may vary by telescope brand or size due to different configurations.   Material costs, packaging, shipping, and handling costs are in addition to prices shown.   Shipping and handling costs are based upon the weight and size of your containers and the destination.

Full installation with complete checkout $395.  

Here's how it seems to work well:

Ship or bring to me your rocker box and ground board.   I will install the ServoCAT parts that can be installed on those components.   About a week later, bring me the rest of your telescope.   If you get the telescope to me by 9 AM, I will complete the installation, and you can drive away the next day .   Includes installation of ALT and AZ Servos, installation of new ground board from RXD (required), and ALT drive cable.   Includes installation of DSC Stalk if you purchase it from me at time of ServoCAT installation.   Installation of other items is extra and not included in the above price.

Only need DSC Stalk and/or PC Podium installed?

  • Mechanical Installation of DSC Stalk . . . . $25
  • Mechanical Installation of PC Podium . . . . $25
  • Wiring of rocker box for DSC Stalk and/or PC Podium . . . . $95 (cables not included)

    Email me to start discussion and make a reservation: cs(at)marklessastronomics dot com

    Charles Starks, Charlotte, NC

    Prices subject to change without notice.

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    Ground Board Repair Services.

    Does your telescope stop, or slip, at certain spots in its rotation in azimuth?   You may have a notch in the edge of your ground board, which was caused by the roller continuing to run when your telescope was constrained from rotating.   Send it to us for repair.   We will repair it, sand it smooth, and seal it.

    Only $30 for the first repair, $15 for each additional repair if performed at the same time, plus S&H to your location.

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    Great Astro Links to other fine products and ideas:

    Astrocrumb Filter Slides - a "MUST HAVE" accessory for your Big Dob. Roger builds 'em RIGHT!

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    Obsession® Telescopes - by Dave Kriege - Heirloom Grade Telescopes for the discriminating astronomer

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    Copyright 2003-2012, by Charles Starks, Charlotte, NC, All Rights Reserved

    Updated: 7:53 AM 8/28/2012