Re: ATM Parabola center

["A. Suykerbuyk" <asuyker@wxs.nl>]

>Collimation by any means against a center mark presumes it is at the
>true optical center. If it isn't, collimation will be off, as can be
>detected in a star test. I too would like to know if this is common.
>>
I wonder if a star test on a real star should not be regarded as the final
test for collimation, especially when one is using a fast mirror.
This makes the use of lasers etc. a little bit easier.
When one is using a artificial star the scope will be horizontal, the mirror
will not be
supported at its back, and collimation will be off when the scope is in use.

Regards,
Adrie Suijkerbuijk.