Quote:
Originally Posted by jjjnettie
I already have one of those gizmos. I must be a bit of a dodo as I couldn't see any advantage in using it.  |
It may be good for guider, me thinks. Because it is adjustable (left-right, up-down) quite a bit so the guiding star should be easier to find.
My original intention was to used it in Cairns, when taking the spectra of the chromosphere - because of diffraction grating, I thought I needed something like this to adjust for deflection angle (3.8° in case of Star Analyser without compensation prism).