Ed Kishel
Veteran
I am attempting to create a scene file for using outdoors- in full sunlight (where highlight clipping can be most problematic). It's easier to fix a cliped highlight in a studio where you have control over lighting, but when you are running around outside trying to pick up quick shots- that's another matter. I have all my other scene file settings chosen, but have to decide on a gamma/knee/drs combo that will give me a bit of safety on the high end. Ultimately I want to see what combination of these scene file options will hold on to the highlights the best (should I need to push them to keep shadow detail).
So I want to conduct a series of tests to determine how the GAMMA curves, and thier inclusion (or exclusion) of KNEE and DRS would react to being over-exposed.
My informal, un-scientific test setup is as follows:
1) AF100 with all scene files settings constant except for GAMMA, DRS and KNEE
2) Recording a Kodak 19 step grey scale card using same light output
3) Use Lumix 25mm f1.4 lens for all tests
4) Take a spot meter of first panel of grey scale- and set its exposure via iris for approx 95 IRE (and consider this properly exposed/or baseline)
5) Add 1 stop of light
6) Add 2 stops of light
7) Import raw .mts files into Vegas Pro and export full quality stills for comparison
Below is a short practice I did last night. I just picked 3 random sets:
http://www.edwardkishel.com/temp/af100DRcliptest.htm
(excuse the cat hair that I discovered stuck to the card)
Before I do all 204 Gamma, DRS, and KNEE combinations- does this approach sound good (based on the test's focus, and my resources at hand)? Is this overkill? Or is there a general consensus for a scene file for use under harsh outdoor light that renders this idea obsolete. Cause I haven't found one.
So I want to conduct a series of tests to determine how the GAMMA curves, and thier inclusion (or exclusion) of KNEE and DRS would react to being over-exposed.
My informal, un-scientific test setup is as follows:
1) AF100 with all scene files settings constant except for GAMMA, DRS and KNEE
2) Recording a Kodak 19 step grey scale card using same light output
3) Use Lumix 25mm f1.4 lens for all tests
4) Take a spot meter of first panel of grey scale- and set its exposure via iris for approx 95 IRE (and consider this properly exposed/or baseline)
5) Add 1 stop of light
6) Add 2 stops of light
7) Import raw .mts files into Vegas Pro and export full quality stills for comparison
Below is a short practice I did last night. I just picked 3 random sets:
http://www.edwardkishel.com/temp/af100DRcliptest.htm
(excuse the cat hair that I discovered stuck to the card)
Before I do all 204 Gamma, DRS, and KNEE combinations- does this approach sound good (based on the test's focus, and my resources at hand)? Is this overkill? Or is there a general consensus for a scene file for use under harsh outdoor light that renders this idea obsolete. Cause I haven't found one.
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