Magenta hue still a huge issue with IR filter

[Scott Summers]

Hey guys,

Anyone else have problems with Epics needing a great deal of green hue to counter the magenta hue coming through in shots? I've got Formatt NDs, with a Formatt IR Hot Mirror, and the HOt Mirror doesn't seem to do anything...

Is it normal to be adding 20+ green tinge to compensate?

 

[Mike P.]

Are you maxing out your NDs (particularly variable NDs)? That adds huge magenta. Lighting also adds -- LEDs add either purple or green tints. Hot mirror gets rid of IR pollution, which isn't necessarily purple (I thought it was more reddish hues that look a little more purple in the blacks which is where they tend to show up).

But, yeah, having to add +20 tint seems quite excessive.

 

[ericyoung]

Is your hot mirror facing the right way? Some hot mirrors need a particular side to be facing outwards.

 

[John Fairstein]

I had a problem with magenta highlights both on the RED One and the EPIC. I didn't see it as much if any in the midtones or shadows. It was particularly noticeable on some faces. I saw it in tungsten 3200K, 4100K, and afternoon daylight. In the still photography world, we called this a color crossover. You might try taking the clip into REDcine and pull the red and blue curve highlights down, while leaving the toe and midtone alone. By doing it this way, you avoid giving the shadows and midtones a green cast.

 

[Mike P.]

I had a problem with magenta highlights both on the RED One and the EPIC. I didn't see it as much if any in the midtones or shadows. It was particularly noticeable on some faces. I saw it in tungsten 3200K, 4100K, and afternoon daylight. In the still photography world, we called this a color crossover. You might try taking the clip into REDcine and pull the red and blue curve highlights down, while leaving the toe and midtone alone. By doing it this way, you avoid giving the shadows and midtones a green cast.

This sounds like DRX (not to be confused with HDRx)... The RGB channels tend to clip red and blue first, making over-exposed (or close to it) portions of the image appear pink/magenta... Has nothing to do with filtration. It wasn't until recently (RCXp 16?) that you could apply DRX with a rocket enabled...

Maybe post a screenshot Scott, just so we know what we're dealing with.