Hi all,
Was going after improving my collimation and so bought another collimation tool, a '2-inch TS Optics Concenter eyepiece' which makes secondary alignment under the focuser tube a breeze.. and its highlighted the issue nicely.
The secondary holder seems a little too long (or the spider placed a little too close to the focuser). I couldn't get the secondary to present as a circle whilst simultaneously falling nicely into the concentric rings of the eyepiece.
Removing the secondary spring completely brought the secondary holder closer to where it should be, but now that the secondary holder is touching the secondary mount hub. With only a minuscule length of the secondary collimation screws protruding holding the secondary in place, the only way i can see to perfectly center the secondary under the focuser is to shave off some of the holder length to create the space (or move the spider further away from the focuser/primary which isnt possible due to running out of tube).
Has anyone been there, done that?
The 3 images:
- My finishing position (much better but not perfect)
- A schematic, professionally drawn
, showing the red section of the secondary holder im intending to shave down.
- My starting position (bad)
Scope:
Skywatcher Quattro 8" (stock)
