[ATM] Conical mirror question

[Mike Shuken <mikeshuken@value.net>]

Hello,

Has anyone purchased a conical mirror?

I was looking at this website - seems to be some very well made 
mirrors for Dob building, they charge about $50 more for a conical mirror.

http://www.rfroyce.com/conical/

Any reason why it would not be better to go with a conical?  The 
*single bolt* mount to the cell seems pretty nice for amateur 
builders, makes the cell construction easier - and the "info" page on 
the website says that it is much sturdier and needs less collimating 
than standard thickness mirrors.

Less weight also, that's kind of nice.

What downsides am I missing here?

Thanks,

Mike
California


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