How to avoid Chromatic Aberration at night shots

[Rodrigo Violante]

Hello, I sometimes like to go and shoot in concerts, nightclubs or similar events. As you can see in the image the chromatic aberration its insane.

I'm shooting with Leica-R at F1.4 iso 3,200 with OLPF low light so you can imagine I'm trying to grab as much light as possible, is there any tips to shoot at this type of events? I feel it I go F4 or even F2.8 I won't see anything.

I'll appreciate recommendations

 

[Bob Gundu]

That looks more like a color gamma issue. Post an R3D snapshot.

 

[Phil Holland]

Outside of what Bob said, you are using a classic lens from a couple of decades ago. If you are looking to shoot virtually CA-less wide open with high contrast situations you'll need modern optics like the Otus and what not.

 

[David Battistella]

Best to post an r3d and process with IPP2 fora start or at least NOT DC2 for this kind of shot. This looks more like a dc vs. DC 2 issue over CA. The CA on the leica R's is no where near as bad as the vintage nikons and on par with superspeeds depending on the copy of the lens. The 35 is best followed by the 50 then the 80 for CA issues wideopen on the R lenses. Stopping down to 1.8 can also be a help.

David.

Ps. Post an r3d. Its the best way to check.

 

[Graeme Nattress]

Yes, please move to using RWG/Log3G10 and the IPP2 Preview Cubes https://red.cachefly.net/IPP2_Preview/IPP2_Preview_Cubes.zip and they'll make things right.

Graeme

 

[Rodrigo Violante]

Thank you for the fast responses!!

Here are the red files: https://www.dropbox.com/sh/on23k1a8tt2cctc/AABmYePa3oRRyBnZXEGCe3Vpa?dl=0

There are two files there one where shot with a Nikon 1.4 35mm and the one on the nightclub it was my 35mm Leica-R super speed 1.4

I also use Log3g10 and RWG and IPP2 Preview

Thanks so much for the help!

 

[Graeme Nattress]

So yes, there's some CA there, but it's exacerbated by colour gamut clipping and over-exposure. IPP2 Preview will fix the out of gamut issues very nicely. In camera, pay attention to the "stop lights" to help avoid over-exposure.

Graeme

 

[Rodrigo Violante]

I forgot to add Advanced settings at the Red Cine X to be able to have the same Color Space. Now its way better. Thanks everyone!!! For a second I was really worried!

 

[David Battistella]

Yeah. If you blow stuff out they way you have in these two clips you are going to have these sorts of problems. The thing is, in the case of the shot with the young woman, you can get the look you want without pushing the camera to clipping.

Histogram and stoplights. WHne you light up the stop lights you can count on this kind of thing happening.

David

That said, you could process your shot at 800ISO to get a more balanced image. Amazing how powerful the raw files is after blowing out the RED channel like this.

But just for reference this looks like classic CA of old nikon glass wide open.

 

[Rodrigo Violante]

I totally get you on the girl shot, but on the nightclub, that shot was when there was light, the other problem is that half of the time is almost total dark, so if I go for a 800 ISO I don't get anything when its dark.

 

[Graeme Nattress]

The problem is not so much that we can see a better image in post by dropping to ISO800, but that at ISO3200 it was over-exposed. If it were better exposed at ISO3200 you'd get more of what you're after in that darker frames would still be visible and brighter frames would not completely blow out.

Graeme