Celestron Monster

[ballaratdragons (Ken)]

I don't know how many of you have seen this, but have a look anyway. <b>It's a 20" (half a metre) Celestron!</b>

Yeah I know. most of you are Meade people.
It might even get Tony to change brands!!

http://www.celestron.com/prod_pgs/tel/c20_index.php

<font size="0.25>$39,900 US</font>

[ballaratdragons (Ken)]

And it is only $39,900 US!!!!!!!!!!!!!!!

I suppose if you are serious enough, it's worth it.

[syzygy]

Originally the Dall-Kirkham design was a modification of the classical cassegrain to avoid figuring the hyperbolic secondary. The price for this simplification was real bad off-axis coma.

Celeston are using a correcting lens presumably hidden away in the light baffle to deal with this. If it works then it's a hell of a lot cheaper than a 20 inch corrector plate!

Regards,
Chris

[Vermin (Tom)]

They need a person standing in that photo for scale.

[ballaratdragons (Ken)]

I notice they call it a 'Corrected Dall-Kirkham' coma correct flat field. They got around the off-axis coma somehow!