Quote:
Originally Posted by Paul Haese
Sounds like you have an agenda here too Cris. John has a perfect right in making his statements. I know of several people who have had trouble with this telescope. Your comments seem to suggest an interest in the outcome the capacity to image with this particular telescope.
Bert might well be an optician but his images have for a long time displayed flexure in the system and the steps he has had to undertake are to say the least not conventional for a 10K plus telescope and it is perfectly reasonable to suggest that something is not right if you have to add a turn buckle to a system and a mechanical holder to hold the camera, which are not standard appliances in astronomy imaging. Stability of the imaging train comes through the rear assembly of the scope and all the connections between various components, it is apparent to me at least that is not possible with this telescope. The AP version of this scope carrying the same load does not have this issue at all and required no mechanical control. Certainly going beyond the recommended imaging circle has contributed to this issue and I accept that, but the fact remains AP seem to have this right and everyone I know has had trouble with this particular scope. So people are not imagining things or misrepresenting things.
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Paul Imaging at F3 is NOT standard.
I have not seen many images from these mythical AP scopes. Even Peter Ward had trouble with orthogonality.
I am not an optician. They make glasses so people with limited vision can see clearly. My background is in Applied Physics. With a very strong emphasis on light optics and x-ray optics.
Standard image trains may work for far slower systems but I guarantee you they flex. You just do not see it.
So please cut out the speculation and misinformation when you do not know what you are even talking about.
Can you give me a list of EVERYONE you know who is having problems? I would like to start a self help group.
By the way F3.0 is far more terse than F3.8! In fact f/3.0 is 60% faster than f/3.8.
Bert