Re: Darkloading

["Willem-Jan Markerink" <w.j.markerink@xxxxx>]

On  9 Aug 96 at 23:47, George L Smyth wrote:

> Willem-Jan Markerink wrote:
> 
> > Nope, only the Konica has a real blind spot in the green; the Kodak
> > shows a rather stead line across the spectrum (HIE and IE share
> > almost the same spectral sensitivity btw).
> 
> Wrong, there's a marked dip in the spectral sensitivity on Kodak's film
> around 520nm.

Yep, but the dip is hardly enough to warrant a solution for the 
fogging only for that reason....the nominal sensitivity is equal to 
that of 900nm! The dip looks aggrevated by the huge sensitivity in 
the UV/blue spectrum, but it is not pronounced in relation to the 
yellow/orange/red spectrum....it's perhaps 0.5 log less sensitive 
than 650nm, and only 0.25 log less than 550nm.
And the dip as such in that area is also not special, even an Ilford
FP4 shows a dip slightly earlier.
The Konica shows two separate areas of sensitivity, one peaking at 
440nm, and one at 740nm. Between 520 and 660nm, the sensitivity is 
nil. 

--
Bye,

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The difference 
between men and boys
is the price of their toys

<w.j.markerink@xxxxx>
[note: 'a-one' & 'en-el'!]

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Topic No. 2