Re: Fw: IR 750 Sensitivity

[ADavidhazy <ANDPPH@xxxxxxxxxxxxxxxxxx>]

Chris,

> it:  check me out and see if this is not right:  of course trees (green) do
> not turn clear (black on a print) on Konica film (one reason given for
> disproof of its green blindness) because they always reflect IR light,
> right, even without a red filter on the camera they are still going to
> reflect IR light and affect the film, correct?  So the only way to really
> test this theory is to take a green inanimate object and theoretically take
> a picture of it where there would be no IR light available and see if the
> negative is clear where the green object is. 

Correct. That is why in my previous note I mentioned that an IR blocking filter
wiuld still have to be used along with the green filter. Thinking along these
lines, a green LED might possibly be a suitable safelight (assuming that the
750 is truly insensitive to green).

> (Andrew D. you could answer this one; aren't you proficient in the science 
> of photography?) 

I did "answer" above but any further inferences as to proficiency in anything
other than mixing a mean manhattan are totally unfounded. hic

adios,
andy

Andrew  o o  0 0 o . o  Davidhazy, Imaging and Photo Tech
         \/\/\/\/\/\/          http://www.rit.edu/~andpph
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