Re: [APML] Film Color Response

["William R. Mattil" <wrmattil@ix.netcom.com>]

Chuck Vaughn wrote:
> 
> Bill,
> 
> > Fuji shows no red nebulosity at all. M42 is green, Flame and Horsehead
> > are not visible at all.
> 
> I had this happen long ago when I tried Ektapress 1600. M42 was red in
> a 5 minute exposure but when I exposed it for 30 minutes it was completely
> green. I assumed that there was total reciprocity failure of the red
> recording layer in 30 minutes while the green kept on going.
> 
> That may or may not be so in your case. It could be that the red recording
> layer has no sensitivity at 656nm but records red stars fine at a slightly
> shorter wavelength.
> 


Hi Chuck,

I appreciate the information but I fear that it has only added to my
confusion here. There are a few people who claim that this film (Fuji)
works just fine out of the box for 30-45 minute exposures. And yet I had
what I consider to be catastrophic :^) failure with it. So I keep
looking at what I did that could have that result and come up blank. 

Thanks !

Regards

Bill

-- 
William R. Mattil	| Fred Astaire wasn't so great.
wrmattil@ix.netcom.com	| Ginger had to do it all backwards
(972) 399-4106		| and... in high heels.

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