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Need advice for where I went wrong with this footage


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#1 Brenton Lee

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Posted 04 March 2018 - 02:56 AM

sample:

 

There's an iPhone photo at the start for comparison.

 

Is there a point where too much ND can detract from an image? Obviously there's a point where you can underexpose but by my calculations via light meter, i should have been within a stop.

 

At ISO 800, 2pm on a very sunny day it was so bright I had to stack 1.2 + .6 ND's to get the exposure down to about t4 / t5.6.

 

Unfortunately the resulting footage seems underexposed and flat. I normally don't have to tweak the knobs much to get a decent image but this looks too crapped out. One team had bright red shirts, the other black and I can't get them anywhere near their original color again.

 

Any advice or comments?

 

 

 

 

 

 

 


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#2 Philip Reinhold

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Posted 04 March 2018 - 04:01 AM

Well- You compare a linear picture with a logarithmic one. For a Log picture it looks exposed okay. You just needs to add a matching Linear LUT for grading.

 

But it looks like you´ve got some IR pollution.


Edited by Philip Reinhold, 04 March 2018 - 04:03 AM.

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#3 Brenton Lee

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Posted 04 March 2018 - 04:25 AM

Well- You compare a linear picture with a logarithmic one. For a Log picture it looks exposed okay. You just needs to add a matching Linear LUT for grading.

 

 

That iPhone photos was just for reference as the ungraded footage is so far away from what it normally looks like that I think something else is wrong.


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#4 Philip Reinhold

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Posted 04 March 2018 - 05:09 AM

Yes you got a lot IR pollution.  This happends because you use normal ND Filters & maybe a camera without any IR Cut in it. So you limited your spectrum by using NDs which doesn´t cut or correct the Infrared wavelenghts.

 

Its difficult to correct in post & you will probably lose saturation. :-/


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#5 Brenton Lee

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Posted 04 March 2018 - 05:10 AM

Yes you got a lot IR pollution.  This happends because you use normal ND Filters & maybe a camera without any IR Cut in it. So you limited your spectrum by using NDs which doesn´t cut or correct the Infrared wavelenghts.

 

Its difficult to correct in post & you will probably lose saturation. :-/

 

Yeah, I figured its something like that.

 

The way everything is tinged red has really sucked the life out of the color. It sucks though, I've used the ND filters a lot but never on days as sunny / bright as this one.


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#6 Brenton Lee

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Posted 04 March 2018 - 05:13 AM

Like this example ...

 

 

 

was still a very bright day, I think I still had 1.2ND in but because it was overcast it was still easy to get a decent image.


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#7 Philip Reinhold

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Posted 04 March 2018 - 05:18 AM

You do have  a little IR pollution there as well.

 

Without getting to much into color theory & wavelenghts.

 

Just have a look at this article:

 

http://www.thehurlbl...mbat-it-tiffen/

 

Do you use a Blackmagic Camera?


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#8 Brenton Lee

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Posted 04 March 2018 - 05:19 AM

You do have  a little IR pollution there as well.

 

Without getting to much into color theory & wavelenghts.

 

Just have a look at this article:

 

http://www.thehurlbl...mbat-it-tiffen/

 

Do you use a Blackmagic Camera?

 

 

Yeah, a pocket.

 

I'll have a good read of that article tonight! Thanks. 


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#9 Brenton Lee

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Posted 04 March 2018 - 07:09 AM

That is a very, very interesting article. 

 

I was aware of the whole IR thing but had never seen it IRL. 

Lessons learned, case closed. 


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#10 Macks Fiiod

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Posted 04 March 2018 - 09:56 AM

Could you upload a raw clip of that footage so we could try playing with/correcting it?


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