Quote:
Originally Posted by Jason D
I watched all 9 videos. The video is missing the part about how to align the focuser axis which can be accomplished by either:
1- Fine tuning the secondary mirror to redirect the single laser beam to the primary center or
2- Fine tuning the secondary mirror to align the primary center spot with the sight-tube cross hairs
In addition, the video shows the primary mirror being adjusted when the OTA is at horizontal position -- not a good idea. It is recommended to have the OTA at around 60 degrees when the primary mirror is adjusted
Jason
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With those twist clamps for lenses, the focuser adjustment is not much of an issue, I will be buying one of these later and will check.
There are a couple of things I would do a little differently, for primary adjustment placing in both horizontal (near enough to) and 60deg is a good idea for both. Only recently I was checking mine and picked up a set-up error with my scope checking both, but I think it was also placed horizontal to allow better youtube instruction.
Although mostly not for primary adjustment it is good practice not to tilt a newtonian above 45deg as it is possible for things to fall or be flicked in and potentially damage the mirror. I think that was mentioned in the video although I do remember this being a concern before watching the video.
I'd be interested in knowing why you would put it at 60 deg and not lower?