Quote:
Originally Posted by Peter Ward
Nothing wrong with a C14 relatively small secondary, no diffraction spikes. and plenty of aperture...Don Parker started the trend of using them as uber planetary scopes back in 1980's to great effect.
The laws of optics haven't changed much since
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My reasons for wanting a larger aperture is more to do with speed of capture and getting a greater number of frames due to the increase amount of light.
Diffraction spikes are a bit of a misnomer in planetary imaging and therefore don't figure in the equation. You only have to look at Phil Miles's and Trevor Barry's image which are taken with very large Newtonians, to see that diffraction spikes are not an issue.
I think Don is most known for his use of Newtonian though, but yes he was/is the grand father of planetary imaging.
The C14 is very portable and hence why I have stuck with it for so long. It's probably for now the best option I have. If I were to go larger it would be a 20" or great scope.