Wet plate collodion spectral sensitivity?
Can anyone tell me what the spectral sensitivity would have been like back in the 1850/60s. Was collodion simply just blue sensitive. I ask because I have a friend doing some lens software modelling for me on some of the early lens designs and he has asked what wavelengths would have been most important?
Re: Wet plate collodion spectral sensitivity?
Have you looked for real research on it? Google it.
I'm sorry, but such a technical question is like standing on the steps of a major electronics research library, and asking people going inside "can you tell me the resonance frequencies of a capacitive reactance circuit?"
Re: Wet plate collodion spectral sensitivity?
I'd have thought it basic data myself (but then I have a photo science background) and having searched I've found some data, but I'm a bit dubious about some of its assumptions. I thought that someone here might have had some data too.
Re: Wet plate collodion spectral sensitivity?
Quote:
Originally Posted by
pgk
Can anyone tell me what the spectral sensitivity would have been like back in the 1850/60s. Was collodion simply just blue sensitive. I ask because I have a friend doing some lens software modelling for me on some of the early lens designs and he has asked what wavelengths would have been most important?
This should answer your questions: https://www.lundphotographics.com/in...dion_film.html
Re: Wet plate collodion spectral sensitivity?
Thanks, it does and I've sent on the link.
Re: Wet plate collodion spectral sensitivity?
Lund is stepping up
That is new news!
Quote:
Originally Posted by
paulbarden
Re: Wet plate collodion spectral sensitivity?
Quote:
Originally Posted by
Tin Can
Lund is stepping up
That is new news!
"Stepping up"??
Re: Wet plate collodion spectral sensitivity?
Meaning they are still posting useful data
Dated May 19, 2020 by Lund
Quote:
Originally Posted by
paulbarden
"Stepping up"??
Re: Wet plate collodion spectral sensitivity?
Quote:
Originally Posted by
Tin Can
Meaning they are still posting useful data
Dated May 19, 2020 by Lund
Yes, they do so intermittently.
Re: Wet plate collodion spectral sensitivity?
I thought that wet-plate era emulsions pretty much ortho; were sensitive to the blue-green end of the spectrum. Not sensitive to the red end or into the Ultra-Violet.
One could do some experimentation with B^W colored filters. A sort of contact printing set up could expose one plate to several colors from Red Green, Yellow and Blue. I am sure thart someone here can figure ourt a more sophisticated and more effective way way to do this in one shot.