Re: [APML] Rosette comparison (was New Rosette Mosaic)

[Aplanatic@aol.com]

Hi Tony,

Perhaps I'm getting too old for this telescope making stuff... I assist and advise at a telescope making laboratory/class and when asked about TDE and what to do about it, I now say:  Start with a mirror that's 10 mm larger in diameter than the one you want and plan on masking off the edge.

To some of the hardcore ATMs this simple and practical advise is -- how should I say? -- not taken very well at all.  :-)

Anyway, back to astrophotography.....

-Dave-

> Dave,
>  
>    Thanks... sorry for the stab at humor... is Rob using the XME camera? Maybe it's something that happens with those "micro lenses" scattering light...  I do understand your explanation... it makes sense. I know that Tom Scott took six months to generate a perfect f/3 primary for me with no turned edge... he had to do it over and over again until he finally got it right... not an easy thing to do for sure... especially 
> at f/3.
>  
>       Tony

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