AF102 Peak white tests SCREEN GRABS

Shooter

Shooter

Veteran
PEAK WHITE TESTS

Simple methodology: Peak the whites and fill the screen predominately with a lot of white imagery and detail.

50 FPS shutter 1/250th

Whites held up very clean. Slight hint of "clamping" in image 3 to 4

Cherrywater1sm-1.png


Cherrywater3sm.png


Peakwhitescalesm.png


PeakWhiteTestsm.png
 
I'm not sure I understand the test being done here. Do you mind elaborating a little bit?
 
PaPa said:
I'm not sure I understand the test being done here. Do you mind elaborating a little bit?
Click to expand...

As a D.P I have always struggled a little with 'WHITE' when shooting on a digital camera. Getting a clean and pure white is more difficult in digital than it is in film.

Getting a "Pure White" is my goal. My collaborator Chris ( a D.P also) set up the shot because he had the same issues and also wanted to take this through to Post.

As soon as the white moves down from 100% (1.0) it moves towards tone (grey). I see lots of evidence of that on broadcast TV when white cycs are shot and to me ..they look muddy ( grey)

Some cameras will give the impression of white and the subject can look great but some cameras are actually clamping the signal on the subject because of the high white signal input.

This test was to see what I could achieve with the AF102. Its kind of about Contrast in a high key lighting set up as well.

I was well pleased with the result.

Hope that helps?
 
One of the first shots I took with the AF100 when I had the pre pro model for the day was shoot in a cyc studio. These results and your findings are similar to what I saw. I didnt get to shoot Cherries in water however, and really like how they came up in your shots.
 
Noel Evans said:
One of the first shots I took with the AF100 when I had the pre pro model for the day was shoot in a cyc studio. These results and your findings are similar to what I saw. I didnt get to shoot Cherries in water however, and really like how they came up in your shots.
Click to expand...

Thanx Noel. I am sure you will agree about digital white.

Cheries in water...man I wish this camera could run to 150 fps.
 
So Shooter, what did you peak the whites at- right at 100%? On the WFM?
How did you WB? (with all that white, that seems like a dense question, just checking if manual, preset, dialed in).
Can you upload video of your 50 fps? I'd love to see those cherries slowly dancing in the water, even if not 150 fps! :^)
Thanks!
 
That white peaking is at a nudge under 100% wfm.

W.B was white card under the lighting.
Light units previously measured with a color temp meter. Camera and meter agreed within 100 degrees.

Not worth posting the footage. This camera aint fast enough to really capture action like this in slo mo.
 
gosselinsm.jpg


tried doing some type of white test. Very interesting to do actually. The one on bottom is closest to white. Top one is a little warm. All natural light.
The wall to his Left ( frame right ) is a little off white, which is why the left side of his face is slightly warmer. ( due to bounce )
 
Last edited:
Detail: -6
VDetail: -6
Chroma: +1
Gamma: CineD
Matrix: Norm1
DRS: off

in post, used an S curve, added a little noise and unsharp mask.
 
To me ...in your 2nd shot... the white brick wall is slightly over exposed. Maybe 1/2+ stop.

There is indication that the bricks have texture ( detail) and that is burning out a little.

This camera certainly can produce clean whites though
 
they shouldn't be clipping? Perhaps the curve brought them up a touch too much, because i can bring the mids down and retain all the detail there.

I believe they were between 85-90 IRE. Where would you recommend hitting whites to make them bright and nice?
 
In your sample with the painting on the brick wall...I am not saying the wall is clipping but I am saying that the detail on the wall is a little over exposed.

Because there is detail in the bricks ( shadows in the mortar between the bricks actually)... this wall needs to be considered as not entirely a 100% white when you come to expose it.

Mid curves are not where this detail is so adjusting them wont do much. Bringing down the highlights may help ( if there is enough detail left there from the source exposure.)


There is nothing actually wrong with the image at all but it is a good example and discussion point about exposing for whites.
 
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