Re: Spectrowho??

[boblong@xxxxxxxxxxx (Robert Long)]

On Sun, 20 Oct 1996 01:24:13 +0100, Willem-Jan Markerink wrote:

|On 19 Oct 96 at 17:01, Robert Long wrote:
|
|> Some of the data sheets posted on the Ilford web site have both
|> "spectrograms" and "wedge spectrograms," which suggest different
|> spectral sensitivity for the same film.  Can anyone here tell me what
|> the difference is and how the differences in response should be
|> interpreted?
|
|Can it be that one is linear and the other log scale?

It can.  But I couldn't see much relationship between some that
purported to relate to the same film.

BTW, I'm really enjoying Walter Clark.  Some of what he says is such
ancient history, and then all of a sudden he'll do something like lay
the groundwork for nightscopes.  What he has to say about sensitizing
dyes is particularly fascinating in explaining the weird shapes of
sensitivity curves--for IR films in particular.  I trust you've noted
the English/German terms for various dyestuffs on p. 84--didn't you
have a question in that area a few weeks ago, or was that do do with
respective chemical nomenclature?

Bob Long
(boblong@xxxxxxxxxxx)

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Topic No. 5