Quote:
Originally Posted by rmuhlack
well moving the primary would also change the focus point. If the offset is wrong and you want to fix it then you'll have to change something. if you don't want to cut new holes in your tube for a new focuser position, and you don't want to change the position of the primary or extend the secondary down because that will alter the focal plane, then what is left...?  You could get a new tube I guess, or the nuclear option of a whole new scope... |
Hi Richard,
Moving the primary down 15mm and also the secondary down 15mm will
keep the focal point the same -
it will only fix the incorrect offset -
which is what I want.
Note: this telescope was taking pretty good pictures
even though it was set up incorrectly.
see here:
https://www.flickr.com/photos/247194...in/photostream
cheers
Allan