AF100 oversaturated higlights

Eimulis

Eimulis

Active member
Hi,
is there a way to get rid of AF100 oversaturated ugly transitions from exposed to overexposed areas? especially on faces:
af100_7d.jpg

it kind a reminds me of my old sony FX1.
when dslrs showed up I really fell in love the way they render those transitions
 
I do three things. first, i use the WFM and zebras so I don't overexpose. I turn down chroma in camera to at least -3, sometimes -7. and then I also use a little black pro mist filtration which does beautiful things to the extreme highlights you can't help but overexpose -- like car headlights, etc.
 
is there some samples on internet of af100 overexposed faces without this ugly transition?
 
Overexposed faces are tricky with the AF. Best is to stay at below 85% zebra for faces at all times. But reducing chroma helps alot and using the Cine gammas.
 
Arunus: Good advice above - reduce chroma in the setup and I like to keep the waveform below 80ire on face highlighs.

Impressive Vimeo reel! Especially, "Sudie, derintojau!" and "Wimax interneto reklama"
 
editman said:
But reducing chroma helps alot and using the Cine gammas.
Click to expand...

According to Barry's book, it's the Cine gammas that actually tend to have uneven handling of the highlights in RGB space. From what I remember he said CineV and D are the ones that are mostly likely to give you that yellow or magenta tint to highlights since they clip unevenly more easily. Or am I mistaken?
 
editman said:
Everytime I've tested the gamma curves and which one that has the best highlight clipping it's the Cine ones.
Click to expand...

Yeah, the only one I've found to have relatively acceptable highlight gamma is Cine V, but it still often has issues with oversaturated, often yellow highlights...
 
Hey, I replied to your youtube question:

I do a few things

1) Make sure my white balance is spot on
2) Use lower saturation in camera to ease the chroma clipping
3) Use a little highlight de-saturation or 3-way color correct on the highlights to pull them back to a proper color
4) Use an S curve to smooth out the clip transition.

All of this works very well. I no longer worry about clipping cause sometimes I want things to clip and i know i can have them look pleasing when it gets to post.

Here is a before and after picture doing the steps i described. Difference is minimal, but sometimes all you want is a simple effect. You really should try to avoid extreme blownout hilights whenever you can. This camera needs control.

Open these guys up in their own window and switch back and forth to see the effect:

http://img842.imageshack.us/img842/6491/beforepl.jpg
http://img189.imageshack.us/img189/7886/afterxk.jpg

more subtle examples:

http://img84.imageshack.us/img84/4348/af100test02u.jpg
http://img338.imageshack.us/img338/5428/af100test01.jpg
 
PaPa said:
Hey, I replied to your youtube question:

I do a few things

2) Use lower saturation in camera to ease the chroma clipping

All of this works very well. I no longer worry about clipping cause sometimes I want things to clip and i know i can have them look pleasing when it gets to post.

Here is a before and after picture doing the steps i described. Difference is minimal, but sometimes all you want is a simple effect. You really should try to avoid extreme blownout hilights whenever you can. This camera needs control.

Open these guys up in their own window and switch back and forth to see the effect:

http://img842.imageshack.us/img842/6491/beforepl.jpg
http://img189.imageshack.us/img189/7886/afterxk.jpg

more subtle examples:

http://img84.imageshack.us/img84/4348/af100test02u.jpg
http://img338.imageshack.us/img338/5428/af100test01.jpg
Click to expand...

I like your examples. What settings do you recommend in camera for chroma clipping?
 
Right now I'm using

Detail -5
VDetail -5
Coring 0 or -1
Chroma -4
Gamma CineD
Matrix Cine or Norm 1 (more noise helps break up posterization)
 
I find the video limiter in Premiere to be a good tool to make highlight clipping a bit smoother and get rid of to much colour skew due to overexposure.
 
PaPa said:
Hey, I replied to your youtube question:

I do a few things

1) Make sure my white balance is spot on
2) Use lower saturation in camera to ease the chroma clipping
3) Use a little highlight de-saturation or 3-way color correct on the highlights to pull them back to a proper color
4) Use an S curve to smooth out the clip transition.

All of this works very well. I no longer worry about clipping cause sometimes I want things to clip and i know i can have them look pleasing when it gets to post.

Here is a before and after picture doing the steps i described. Difference is minimal, but sometimes all you want is a simple effect. You really should try to avoid extreme blownout hilights whenever you can. This camera needs control.

Open these guys up in their own window and switch back and forth to see the effect:

http://img842.imageshack.us/img842/6491/beforepl.jpg
http://img189.imageshack.us/img189/7886/afterxk.jpg

more subtle examples:

http://img84.imageshack.us/img84/4348/af100test02u.jpg
http://img338.imageshack.us/img338/5428/af100test01.jpg
Click to expand...

Your examples are interesting but I'm not sure you're actually recovering clipped footage here. What it seems to me is that you are bringing out a lot of detail in the whites where the MOST digital information is held. Your screen-caps look great for what you did by bringing out the detail in the highlights but again, I'm not sure your highlights were clipped in the first place because if they were I'm afraid there would be no detail to recover.
 
Zak Forsman said:
I do three things. first, i use the WFM and zebras so I don't overexpose. I turn down chroma in camera to at least -3, sometimes -7. and then I also use a little black pro mist filtration which does beautiful things to the extreme highlights you can't help but overexpose -- like car headlights, etc.
Click to expand...

What strength Pro Mist filters to you find to be the most effective Zak?
 
It depends on the software where clipping occurs. e.g. with Vegas if you set project settings to 32 bit full range linear it will clip at 100%, but then you can drop the levels effect onto the clip and pull output white down to arround 0.84 and it brings all the superwhites back below 100%. Pretty cool.
 
Steve Kahn said:
Your examples are interesting but I'm not sure you're actually recovering clipped footage here. What it seems to me is that you are bringing out a lot of detail in the whites where the MOST digital information is held. Your screen-caps look great for what you did by bringing out the detail in the highlights but again, I'm not sure your highlights were clipped in the first place because if they were I'm afraid there would be no detail to recover.
Click to expand...

Never said I was recovering information in clipped, just the clip's look better and smoother transition. But FWIW, the image of the curtains definitely looks better in the after. Switching between them shows a clear example of smoother transitions and more detail held in the brights. I don't know if im "bringing out the detail in the highlights" but to my eye there is definitely more info! :D
 
Definitely curtains look better; maybe you could massage the abrupt transition in the lamp shade a bit more?
 
You must log in or register to reply here.
Back
Top