On 5/24/20 12:43 PM, wrote:
On Sunday, May 24, 2020 at 9:31:33 AM UTC-7, dale wrote:
On 5/24/2020 9:34 AM, wrote:
On Saturday, May 23, 2020 at 6:31:16 PM UTC-7, dale wrote:
On 5/22/2020 9:16 PM, wrote:
Flashes are daylight balanced, so you don't need a filter for correct color balance. If you didn't use a flash and photographed in the shade, the slide or transparency would just be a bit cool (err to blue.) Back in the day if you were to project that slide, the minor color shift might matter. Today, unless you are looking for color critical slides to project in an old school projector, don't worry one bit.


aren't there different color temperatures of daylight?

5000K, 6500K, 9000K, etc.?



On Wednesday, June 5, 2019 at 7:47:49 AM UTC-7, dimitris tzortzakakis wrote:
" Wrote in message:
The new Kodak E100 film requires an 81b or 81c in the shade or using flash?


Actually after looking at my reference book it.s 81A for shadow or
flash for daylight film but those filters are hard to find
now
--
t


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--
Minister Dale Kelly, Ph.D.
https://www.dalekelly.org/
Board Certified Holistic Health Practitioner
Board Certified Alternative Medical Practitioner

Sure, all sorts of colors of light exist under the sun. But back in the day when they were developing color film for the first time (pun ;-) ) they settled on the average color of daylight on a sunny day. Alternatively there was tungsten film balanced for the artificial lighting of the day. Strobes were balanced to mimic daylight.

If you wanted correct color before digital, you'd have to use one of those two films, then use filters to correct. The filters you mentioned were for shade, and there were others for florescent lighting, using daylight film under tungsten lights, etc. And for precise color corrections you might also need a color meter and CC filters that just add colors by increments (5y, 10m etc.) Minor corrections to color were also necessary when reciprocity failure kicked in addition to exposure.

This may have been a long answer that has little utility to you however. Maybe what you mean is if you're photographing somebody in the shade with daylight film and a flash- what happens to the color balance. The answer is that the areas illuminated by the flash will have the correct color balance, whereas the areas of the photo illuminated by natural light may err to the cool side. If you are using the flash as fill, the differences are likely to be subtle.

Sorry for the long winded response, does that make sense?


Yes, thank you !

Am I right that different positions of the Sun, ahead and above for
instance, have different color temperatures? I can't remember but I
think one is D5000 and the other is D65000

my current endeavors don't get into the professional considerations


--
Minister Dale Kelly, Ph.D.
https://www.dalekelly.org/
Board Certified Holistic Health Practitioner
Board Certified Alternative Medical Practitioner

Yes, the color of sunlight is warmer as it's lower on the horizon, going into shade is cooler. I found this link that seems to illustrate the issue well: https://www.shutterstock.com/blog/ke...20Shutterstock


Additionally, the surroundings may affect the color. For example, if
your subject is partially illuminated by sunlight reflected from a blue
wall, the subject may have a blue tint.

--
Ken Hart