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  #341  
Old 16-06-2018, 02:21 PM
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sopticals (Stephen)
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Originally Posted by pixelsaurus View Post
Cheers. Sorry for the delay. Will it also remove any overcoating as well?
Yes.

Stephen
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  #342  
Old 16-02-2019, 05:55 PM
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sopticals (Stephen)
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Any body out there?

Hi guys, you got any new mirror grinds on "the make"?

I've been so enjoying the full 2 degree wide views of Milky Way with my 10" Zhumell (one of my two "grab and go" scopes) using a Nagler 31T5 that for a "more intense" experience at the 1200-1250mm focal length I have decided to grind out a 12 1/2" blank I have sitting spare, to approx f4. Exit pupil at the 40.3x is close to 8mm, but my dark adapted pupil opens pretty wide at 7mm plus so won't lose much light.

Have played with 6"f8, 8"f6, 10"f5 (all around 1200-1250mm fl) so why not try 12.5" f4 for the same size FOV?

Anyway started the project today. See picture.
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  #343  
Old 19-02-2019, 08:11 AM
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pixelsaurus (Mike)
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No grinding at the moment. A friend has given me a complete 225mm diameter Dall Kirkham mirror set ,which need to be coated, plus a transfer lens. I need to find a tube or summit. This after flocking my 12" newt and building an EQ platform.
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  #344  
Old 20-02-2019, 08:26 AM
Stefan Buda
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Another one alive in Melbourne:
A couple of 250mm, f2.7 CDK primaries in the making.
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