Brenton Lee Posted March 4, 2018 Share Posted March 4, 2018 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? Link to comment Share on other sites More sharing options...
Philip Reinhold Posted March 4, 2018 Share Posted March 4, 2018 (edited) 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 March 4, 2018 by Philip Reinhold Link to comment Share on other sites More sharing options...
Brenton Lee Posted March 4, 2018 Author Share Posted March 4, 2018 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. Link to comment Share on other sites More sharing options...
Philip Reinhold Posted March 4, 2018 Share Posted March 4, 2018 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. :-/ Link to comment Share on other sites More sharing options...
Brenton Lee Posted March 4, 2018 Author Share Posted March 4, 2018 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. Link to comment Share on other sites More sharing options...
Brenton Lee Posted March 4, 2018 Author Share Posted March 4, 2018 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. Link to comment Share on other sites More sharing options...
Philip Reinhold Posted March 4, 2018 Share Posted March 4, 2018 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.thehurlblog.com/what-is-ir-pollution-and-how-do-you-combat-it-tiffen/ Do you use a Blackmagic Camera? Link to comment Share on other sites More sharing options...
Brenton Lee Posted March 4, 2018 Author Share Posted March 4, 2018 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.thehurlblog.com/what-is-ir-pollution-and-how-do-you-combat-it-tiffen/ Do you use a Blackmagic Camera? Yeah, a pocket. I'll have a good read of that article tonight! Thanks. Link to comment Share on other sites More sharing options...
Brenton Lee Posted March 4, 2018 Author Share Posted March 4, 2018 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. 1 Link to comment Share on other sites More sharing options...
Max Field Posted March 4, 2018 Share Posted March 4, 2018 Could you upload a raw clip of that footage so we could try playing with/correcting it? Link to comment Share on other sites More sharing options...
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