Magenta cast on recorded image

J

James Bridges

Well-known member
I am using the AF100 with HMI's on 5600 preset and noticed a magenta cast on all the footage. We were using a Panasonic 17" LCD Hd monitor and didn't notice it until we went into color correction on the DaVinci.
Absolutely no issues getting rid of it. Is there a tint control in an engineering menu or does this require the camera to be factory serviced.
 
Is it a hard cast? When comparing my AF100 to my GH2, the af favors magenta for sure, which I usually match one to the other with a quick 3 way.
 
It looks like a 1/16 magenta filter is over the lens. This in 5600k preset only. When it go to manual WB it doesn't happen.
 
Interesting. What I see on mine is consistent throughout the white balance range, which I think is just panasonic's color in general for the AF100. Maybe try a manual white balance outside and switch between the 5600k preset and the manual set balance to see if there is a difference. You could also try a black balance.
 
Moral of the story, never use presets. Leave those for point-and-shoot consumer cams. This is why the manual white balance and black balance is there. ;)
 
Don't discount the fact that HMI lighting can have subtle shifts as well depending on bulb age. Shooting film I'd more often than not have to filter various HMI sources to make them agree. A good color temp meter is required though.
 
Yes the AF100's 5600 preset seems a little magenta. And yes, HMIs can vary quite widely in the color of light they put out. Between those two factors I would always recommend manual white balance for the best color accuracy.
 
Standby for a host of subsequent threads and "opinions" that the AF100 is "magenta". (along with all the other issues!)

Seriously...anyone experiencing this should shoot a Grey Card, White Card and Black Card ...then check them in a scope.

Eliminating the lights as the source of the issue is an important step.

I would add. that I am working on some TVCs in the suite rigt now..... and they do not display any of this issue despite HMI , natural daylight light mix and the 5600 preset.

I will get some frame grabs soon.
 
Shooter said:
Standby for a host of subsequent threads and "opinions" that the AF100 is "magenta". (along with all the other issues!)

Seriously...anyone experiencing this should shoot a Grey Card, White Card and Black Card ...then check them in a scope.

Eliminating the lights as the source of the issue is an important step.

I would add. that I am working on some TVCs in the suite rigt now..... and they do not display any of this issue despite HMI , natural daylight light mix and the 5600 preset.

I will get some frame grabs soon.
Click to expand...

Great advice, thank you, from everyone. That's why enjoy this forum.
Fortunately we record a color chart for every scene, always... A real life saver. I normally WB, but this time we wanted to use the preset WB color toggle to dial in the WB. just to try something new.
As I stated, the colorist had no issue fixing it, I just wanted to know if my camera needed servicing or if this is inherent to the sensor.
Jim
 
I wouldn't accept any random HMI as the gold standard of color temp. Try your 5600 preset outside on a sunny day and compare. After a few head bashings of my own, when ever I shoot with an AF I use the Xrite neutral gray card exposed at 70 ire for white balance and fall back to presets and Var if I am unhappy with those results.

It is easy to fix the little magenta issues with a little bit of CC, but I prefer to hit the color rendition as close as I can with the AF. Please remember grading AF footage is far different that grading AVC I 100.
 
You must log in or register to reply here.
Back
Top