Hi Richard. I used to wonder about this myself when I was shooting quite a bit
of IR on the west coast. In fact, though, there was indeed white in pines -
very thin lines of white amid the deep blacks. For this I have always loved the
dramatic outcome of evergreens shot in IR.
My theory is the slender touches of IR in evergreens occurred on account of the
curvature of individual needles, which would have the effect of scattering IR
so widely that only a very narrow portion of it would be reflected directly at
the camera. As opposed to the flatness of deciduous leaves, which of course
direct a great deal of IR into the lens. Incidentally, I have found a similar
effect from shooting saguaros with IR. Very little IR reflection from a
saguaro, except for what gets reflected along one of its spines.
Just my theory based on all of the pines and cypress in my IR landscapes.
Mike Healy
From: `Richard Knoppow <dickburk@xxxxxxxxxxxxx>
To: pure-silver@xxxxxxxxxxxxx
Sent: Sunday, June 28, 2015 10:37 AM
Subject: [pure-silver] Re: Speaking Of Ortho - Black Skies Sought
The tree color depends on the kind: deciduous trees come out
white while evergreen trees are black. This is sometimes used to make
aerial surveys of the types of trees in an area. I don't remember what
it is in the trees that is responsible. This effect requires "real" IR
film with an IR filter. Some so-called IR films are only extended red
but do not get into the real IR spectrum as the old Kodak IR film did.
On 6/27/2015 5:08 PM, Nicholas O. Lindan wrote:
Ortho film is the dead-nuts wrong way to go. And the paper developer you use
isn't going to make a hide's hair bit of difference.
A combination of red and polarizing filters works well. You need the bluest
of clear blue skies and need to be shooting at right angles to the sun. The
weather conditions for getting really spectacular cloud shots are rare.
I think the best film choice is Technical Pan:
http://nolindan.com/UsenetStuff/bowdenmt001.jpg
I find IR film to be just too grainy, not to mention that it turns vegetation
white.
Nicholas Lindan
-----Original Message-----
From: Tim Daneliuk <tundra@xxxxxxxxxxxxxx>=============================================================================================================
Subject: [pure-silver] Speaking Of Ortho - Black Skies Sought
Of late, of done a bit of work to recreate those magnificent black skies
once seen with ortho film and paper processed in Amidol. I have had ...
partial success using deep red filters with panchromatic films like
Plus-X and Agfapan APX 100.
So here's the question - Other than a deep red filter, what else can I do
to get those bright blue skies to go jet black and really make the clouds
pop?
Ideas?
--
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Tim Daneliuk tundra@xxxxxxxxxxxxxx
PGP Key: http://www.tundraware.com/PGP/
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