Hi Folks,
Maybe I should have titled the thread another ... another colimation thread
Anyway not that I can quickly find it (the thread) but someone else had posted a photo of how their colimation looked so I thought I would do the same and invite comment
Quick shot down the focuser with the A70 point and shoot.
To be honest I have never been completely satisfaied that I have the secondary right (thus the question) but basically my procedure is:-
1.) Using laser check that the laser is centered on the primary. OK (rotate it in focuser etc. appears colimated itself and I have checked over a few meters)
2.) Using barlowed laser check I hold up a peice of paper with a small hole over the bottom of the focuser (inside the tube) to see if the shadow of the centre spot centers on the hole - OK
Thats it.
Now visually, as per attached it sort of looks ok but I am worried about the area marked 3. As I see it the secondary appears centered in the FOV as does the primary (all clips shown etc.). Its the rings and centre spot at 3 that has me worried. The outer ring is at the top and the centre spot is off to the right. But as per above those two checks reckon its good but as i said my secondary has me worried (mostly cause I have really buggered around with it
)
Anyway anyone care to comment?
Thanks
Took the scope out at about 7 after checking scolimation etc. and did a quick look at the moon (which looked good). Sat down the watch mythbusters to let it cool etc. and then the cloud rolls in and now its raining - Takes the scope back in
