Cassegrain Characteristics?

[skybadger]

I'm just assembling a 12" cassegrain with a truss tube - it should be great for planetary and the moon

Mike

[Dunkster]

Heavy? Meade's otas might be heavy, but Celestron's (at least up to 11") are lighter than the nearest size SW newt

Are you sure you're not cursing Meade for the sins of the universe Olly?

[ollypenrice]

Heavy? Meade's otas might be heavy, but Celestron's (at least up to 11") are lighter than the nearest size SW newt

Are you sure you're not cursing Meade for the sins of the universe Olly?

Possibly! Sorry. However, the corrector does add an element not found on an open tube design. However, since it replaces the spider I dare say this doesn't have to add much.

I forgot a Plus; no diff spikes on images. I really don't like them. I wish that Tak et all with fast corrected Newt astrographs would offer an optical window version.

Olly

[Peter Drew]

You would then have to faff about with dew prevention systems like all the catadioptric users.

[ollypenrice]

You would then have to faff about with dew prevention systems like all the catadioptric users.

Yes, but diff spikes at 500mm focal length on a Milky Way target means an image of diff spikes and square stars... And cleaning a corrector plate is easy.

Olly