Re: [APML] What's Wrong with these Pictures?

["Bobby Middleton" <bobm@koyote.com>]

1) Was the GR200 hypered?
2) Was it the old formulation that's has been accepted as an excellent astro
film, or the changed emiulsion as recently reported?
3) You've got some severe vignetting that has allowed much more green
response in the center of the frame as compared to the outside of the frame.
Doing a lasso in the middle of the frame with feathering to allow a proper
levels adjustment for the uneven illumination will bring out much more red.
I've e-mailed you a copy showing this adjustment.
4) The long stars are radiating around the center of the frame. I think
that's a flat field issue due to the focal reducer aggrivating an allready
curved field, not a field rotation issue.
5) Warm film, bad processing or chemicals? I don't think so but how could
one know for sure?
Bobby Middleton


----- Original Message -----
From: "Kevin Wigell" <kwemail@twcny.rr.com>


> The short answer is "a lot". Some of the problems, I know what went wrong
> and how to fix. What I can't figure out is why I failed to capture any
reds.
> Take a look here: http://home.twcny.rr.com/kevinwigell/Bad_Images.htm
(These
> are raw scans.)
>
> The film was Kodak RG200, which I have used with success before. In fact,
> here is another image of the Deneb region I took with the exact same
> equipment and film just last month, from the same location, which turned
out
> great: http://home.twcny.rr.com/kevinwigell/Deneb_Region.htm
>
> I have some theories: Film got too warm (it was in a hot tent for a couple
> of days), bad batch of film, bad processing at the 1-hour photo place (bad
> chemicals?). Also, both these photos were taken through intermittent
passing
> thin clouds and haze. But every image on this roll of film showed
> practically no reds. Almost looks like Fuji 4th layer film.
>
> Any ideas would be greatly appreciated.
>
> Kevin Wigell
>
>
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