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Updated 11/19/24

 

 
Dobsonian Goodies

Apertura/GSO motion/stability fix.

Apertura setting circles prototype
EZ adjust setting circles.
Height adjustment stands

 


Image Sharpening Masks
 
Visual: Fix turned down edge.     
Imaging: Remove mirror clip flare.
  

Premium Mirror Cells
for 6" to 13.1" mirrors.

Optimized support points.
Removes mirror-clip flarirng.

Imaging back-focus extender
Cell removes mirror-clip flaring.

 

Clamshell & Rotating Rings

For Dobsonian mounts
.
For Equatorial mounts
.
 
 
Favorite Links

Adventures In Deep Space

Golden State Star Party
Equatorial Platforms
 
AstroGoods.com: Integrated Azimuth Setting Circles

EZ-Adjust Leveling Azimuth Setting Circles
Fits all Dobsonian mounts, easy install, easy use.


Video and images:
1. Video showing ease of use.
2. View of azimuth circle assembly.
3. Drawing for Apertura style altitude circle. 
4. Azimuth & altitude setting circle assembly drawing.
 

 
2 This above view is prior version, before leveling feet.

3. Below is an Apertura style altitude bearing for 12".
Custom size 90 degree arcs for other bearings.
 
Looking to fix Apertura's fast azimuth motion

Easy to use:
  • Set your telescope down, no need to polar align.
  • Point your telescope tube north, either using Polaris or a compass.
  • Rotate the setting circle to align 0 with the pointer on your rocker box board.
  • Level the mount with the integrated leveling feet. A physical bubble level or app works.
  • Done. Easiest polar alignment imaginable.

Simple attachment to your mount:

  • Remove factory ground board feet.
  • Screw the setting circle assembly onto ground board's existing foot holes.
  • Glue, screw, Velcro or strap altitude circle in place.
  • Done.

The azimuth circle's inside diameter is 1/2" smaller than your mount's ground board, making the circle captive under the board's edge. The circle rides freely, with three Teflon pads along the inside edge keeping it centered and easy to move. Once aligned north, tighten one thumb screw to lock in place.

This video has a prior lock bolt style, but show how quick and easy alignment is.

Azimuth circles, two versions:

  • A 90 degree arc designed to match your focuser side altitude bearing.
  • Apertura style bearings altitude circle fits securely around the silver bearing, and straps on..


What do we need from you?

1. Outside diameter of ground board.
2. Distance from ground board outside edge to center of a foot.
3. Altitude bearing type and size, we'll ask after your order is received.  
 
All parts included: Altitude and azimuth setting circles with pointers, leveling feet, all necessary screws and bolts. Baltic birch plywood, Comes light sanded, you finish, place azimuth setting circle in new ground board, attach altitude setting circle, screw in pointers and attach to your mount ground board.

EZ-Adjust Azimuth Setting Circles Kit
Rocker box ground board outside diameter.
Distance from edge of ground board to center of foot.