Is this a problem with my lens or camera

[jaomul]

Hi all

I took a few photos today and with and there seems a real bad magenta tinge in my raw files. These only seemed to manifest when I took photos is a certain direction. It was a cloudy day with the sun breaking through here and there, but I definitely could see no red in the sky.

Even if I adjust the wb and reduce the exposure, there still is magenta there, I can reduce this by reducing the majenta saturation in colour panel but it shouldn't really be there I don't think. Does anyone have any ideas as to why this is here, thanks

FYI F4 1/320 sec ISO 100 Panasonic g80 panasonic Leica 12-60 f2.8-4

 

[tirediron]

1. Have you tried switiching lenses under these conditions?

2. Have you tried shooting RAW+JPG; if so, what does the .jpg file look like?

3. Does bright indoor light (eg shooting in the same relative direction toward a bright ceiling light) cause anything similar?

 

[jaomul]

1. Have you tried switiching lenses under these conditions?

2. Have you tried shooting RAW+JPG; if so, what does the .jpg file look like?

3. Does bright indoor light (eg shooting in the same relative direction toward a bright ceiling light) cause anything similar?

1.2. I didn't try changing lenses, as I didn't see the issue until I got home. I do however shoot jpeg/raw and the jpeg looks oh ( a little blown but not magenta)

3. Battery dead now . I'll try this in a little while, thanks

 

[tirediron]

Step one will be to try and re-create the issue, and then change lenses. I can't imagine what aspect of an element would cause this, BUT... the symptoms you've listed do seem to indicate that the issue could be lens-related.

 

[jaomul]

Just another exmple while the battery is charging
untouched jpeg

Untouched Raw

There is no doubt these are a little clipped. I do think though it is a camera rather than a lens, the jpeg looks fine for what it is. Just in case software was an issue the first example was from ACDsee, the second is from DxO optics

 

[jaomul]

This is what happens with a little highlight recovery

 

[tirediron]

Hold the 'phone... do you by any chance have "Show highlights" turned on or something similar? I'm not familiar with DXO, but Lightroom has a feature where you can use a colour mask to show blown highlights, and that is EXACTLY what that looks like.

 

[jaomul]

Hold the 'phone... do you by any chance have "Show highlights" turned on or something similar? I'm not familiar with DXO, but Lightroom has a feature where you can use a colour mask to show blown highlights, and that is EXACTLY what that looks like.

No, it's not that. Even if I did they would go less red a I reduce highlights, these go redder (is redder a word?) as I reduce highlights.

 

[jaomul]

I can't reproduce with inside light with either of my 2 lenses

 

[Peeb]

Shoot test shots in M, then intentionally overexpose to see what happens. I’m curious to see if it only manifests in blown out areas

 

[tirediron]

Open up the raw file in another application, PS Camera Raw, or download a freeware/trial program and check. That looks like the software rather than the camera to me.

 

[tirediron]

I suppose there's a chance it's a sensor issue, rendering highlights this way, but that's seems very, very, veryyyyyyyyyy unlikely.

 

[jaomul]

I suppose there's a chance it's a sensor issue, rendering highlights this way, but that's seems very, very, veryyyyyyyyyy unlikely.

I have the cause (maybe the cure)
I looked again at all the shots that the red shown. They were all at iso 100. Base Iso is 200 on the panasonic. I took shots at iso 200 and 400 inside, no magenta. When I realized iso 100 was common to all the shots today I took a shot of the lights and was able to get this

Now I know its only at the "false" iso 100 this happens, but it probably still should not. I don't know if its worth returning the camera for this

 

[jaomul]

Thanks tirediron for your help, I would not have thought of photographing inside lights only for your suggestion

 

[tirediron]

You're very welcome, but that still seems odd; WHY should shooting at base ISO -1 render highlights with such an odd colour cast??????