|
Picture |
Name |
Stability |
Installation & Adjusting |
Sizing |
|
|
|
|
|
 |
Single Half Curved Vane Spider |
Shakes side to side when telescope is bumped. |
Difficult to adjust to the center of the tube. |
Must be very precise, and generally does not allow
for adjustments for out of center mirror cells or tube alignments. |
|
|
|
|
|
 |
Single Curved Vane Loop |
Tends to shake side to side in what I would call
the Jello effect. |
Not to bad, a little difficulty adjusting
to the center of the tube.. |
Must be precise, or use slotted screw holes on
an angle bracket which usually causes minor diffraction. |
|
|
|
|
|
 |
Three Curved Vane Spider |
Very stable even when scope is bumped. |
Easy to install. The vanes press against the walls of the
scope allowing the spider to be pushed in place first and fastened after
checking its position. |
Not to critical since the spider can be inserted in a tube
smaller than the spider and the difference is absorbed evenly by the vanes,
centering itself fairly well. |
|
|
|
|
|
 |
Four Curved Vane Spider |
Very stable, excellent for Truss type scopes that often have
four sides to attach to. |
Easy to install. Can be pushed in place first, marked, and
fastened. |
Not very critical since the vane self centers fairly well. |
