Re: [APML] RG200+SHQ100 Composite Posted

[Stephen Pitt <lthuedk@pe.net>]

Thank you Jon, your picture is wonderful.

I had no idea SHQ could be hypered so long and not skew the colour. 
Thanks for sharing.

Stephen Pitt

Jon Kolb wrote:
> 
> Here's one I've been playing around with for a while.  It's a composite of
> two shots taken in September with the Epsilon on 35mm hypered Royal Gold 200
> and hypered Fuji Super HQ 100.  I took John Boudreau's advice and hypered
> the RG200 for 2 hours, 50C, 3 psi.  The SHQ100 was hypered for 3.5 hours,
> 50C, 3 psi.  Both of these films showed strong blue response - one of the
> reasons for this composition was to see about that.
> 
> There was a lot of interesting faint stuff in the scans, some of which was
> beyond my skills to bring out well in the final (sRGB) image.  I've been
> experimenting with different techniques in PW, including brightness masks,
> processing R, G, and B channels individually, and attempts at
> anti-vignetting.  I was unable to duplicate Sean Walker's AV technique in
> PW, mainly because none of the blur transformations I tried would blur the
> image as much as the example in S&T.  This resulted in much less effect
> during the composite step, requiring more of the overlay to be applied, and
> ultimately causing a loss in the faint details.  I'm still trying some other
> methods, and I'll post one if it works out.  Oval-based gradients have shown
> some promise, but I haven't mastered them yet.
> 
> http://home.datawest.net/jkolb/ngc_6914.htm
> 
> Sincerely,
> Jon Kolb
> Adventures in Astrophotography
> http://home.datawest.net/jkolb/
> jkolb@mindport.com
> 
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