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After processing some images from the other night, they all
turned out to have a very blue/violet shift.
Now let me just say that the humidity was 100% (at least,
heh)...I am aware that humidity will affect film, and have
ordered all the parts for a gas purge system.
I have been trying out the Fuji Super 800 film
the last couple sessions, and have been generally pleased with it cause it
picks up stuff fast, I like that because im still new to all this. But these
images are far more "blue" then any other I have taken, so i'm
left kinda wondering what happened. The entire roll of film, which includes
some planetary exposures under 2 seconds is the same - a blue
tint everywhere (when scanned, prints are ok). I should also note that this was
my 1st attempt at exposures over 1/2 hr.
I have my negative film processed at a lab...so I'm wondering if this a result of bad film, processing, scanning
(the prints came out looking ok).
On another note, after looking at the scanned images in
PhotoShop it seems the blue channel contains all the "sky fog / film grain"
(however badly discolored it is), so I'm thinking that this layer of the film is
more susceptible to the extreme humidities...is this possible? But this doesn't
explain why the short exposures are blue also. When I rescanned the images and
adjusted the curves so as not to pick up so much blue the situation improves,
but I'm left feeling something weird was going on here. Must the color curves be
manipulated when scanning, is this the proper technique?
Also let me just say thanks to those who started the thread
about the STV and tweaking the settings so as not to "chase the
seeing", the guiding tolerances with my Gt1 have improved
dramatically.
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