Re: [APML] NGC 7331

[Philip Perkins <philip@astrocruise.com>]

Tony,

That's an excellent result!  Thanks also for the demonstration of what 
Royal Gold 200 will do - very encouraging in view of the current dearth of 
good colour negative films. Now all we need is a 120 format version of 
this!  It looks like you are getting a good wide field from your Cassegrain 
too - I can see only slight distortion creeping in at the corners.  Are you 
using a field flattener with the Cassegrain?

--Philip


>Hello Everyone,
>
>     Hope you are having a pleasent evening.... I have uploaded a "raw" 
> version of NGC 7331 to my site. I was going to zoom in closer but the two 
> negatives that I needed were a tiny bit soft because I thought I did not 
> need to refocus from the previous night (ha-ha-ha!!!)
>I'll try again tonight WITH focusing. This is from two negatives with 
>hypered Royal Gold 200, both 75 minute exposures at f/8 with the 
>Cassegrain. I processed the files to show as much faint stuff as possible 
>but also to keep detail down to the core... you can see the arms 
>spiralling in like a snail. I LIKE this film...!!!
>
>image at:  www.astrophoto.com/7331.htm
>
>So far I can see six H II regions in the galaxy at high res... more will 
>probably show up with better signal to noise.
>
>        Tony




Philip Perkins - philip@astrocruise.com
Wiltshire UK & Luberon France
Astrocruise - http://www.astrocruise.com


--  APML Archives at <http://astro.umsystem.edu/apml/>  ---
             Unsubscribe at <majordomo@seds.org>