[ATM] Curved vane Vs Wire spider

["marco miglionico" <marco.miglionico@blueyonder.co.uk>]

Which would be better for a planetary scope?

I am told that there are no diff. spikes on a curved vane.
But I am thinking so what? Im not looking at stars!
I'm looking at planets - you don't get spikes anyway.

So IF diffraction is a function of  % obstruction of the
light path then my instinct tells me that a wire spider would be
better (as it cuts less light path - curved vane being generally thicker)

My question really is which type has more REAL strenghtening of
of diffactive effects?

Thankyou,

Marco Miglionico



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