Re: [APML] New IC443 and IC444 image

[Alan Brent Jordan <aljordan@gwi.net>]

Hi Mike,

I like your image of the Rosette but was wondering if the baby-blue cast
to the stars was caused by the Tokai LPF or image processing?  I could
not find the unprocessed image.

Thanks,
Alan Jordan
aljordan@gwi.net
http://www.gwi.net/~aljordan/astro

"Mike Cook, AF9Y" wrote:
> 
>   Is the scope really an F4?  Is that including any obstruction in
> the path?  Even a 90min F/8 exposure on E200 with the Tokai shows
> enough background to see the darker frame boundary at my location.
> Using the calculation process below, it had a ratio of aprox 2.
> You can see the processed and unprocessed image here:
> 
> http://www.webcom.com/af9y/rosette.htm  (posted previously on APML)
>

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