Getting Lots of Chromatic Aberration

[Andy Maser]

I'm getting quite a bit of chromatic aberration from my Scarlet and wondering if the same is happening to others. Maybe one out of 10 days I shoot I'll notice the characteristic green/magenta highlight effect on some shots. It happens with Zeiss, Canon, Nikon and Tokina glass both stopped down and wide open. Sunny days, cloudy days don't seem to affect it, nor does sensor temperature or black shading. No filters in front of the lens. And I've never noticed it with my Epic. Frankly, I'm out of variables.

Any ideas?

 

[Timothy Eaton]

Best to send samples.

 

[Thomas Koba]

The cropping of the lens exaggerates lens errors. Everything gets uglier the more you crop the lens.

 

[Bob Gundu]

I am curious why this is so? In fact I would think the opposite as you are getting more of the sweet spot. But if you are referring to simply having less resolution vs cropping, that may be a different issue.

The cropping of the lens exaggerates lens errors. Everything gets uglier the more you crop the lens.

 

[Andy Maser]

I'll collect some samples and post. I was shooting 4kHD yesterday and they were certainly noticeable. Much more noticeable when I punched in to focus assist, which would support your thought, Thomas.

 

[Andy Maser]

Here are a few juicy ones. First 2 are from a Zeiss ZF 35 1.4 stopped way down, third is from a Canon 70-200 2.8. Have similar examples from Nikon and Tokina glass.

 

[Matt Ryan]

Here are a few juicy ones. First 2 are from a Zeiss ZF 35 1.4 stopped way down, third is from a Canon 70-200 2.8. Have similar examples from Nikon and Tokina glass.

Thats a write error. File a support ticket with RED.

 

[Nick Morrison]

The cropping of the lens exaggerates lens errors. Everything gets uglier the more you crop the lens.\

I'm not sure if this is a categorical truth. Cropping into the LENS (ie shooting through it's sweet spot, or even tighter like when at 2K) generally means you are seeing much less distortion, vignetting, fall off, and other aberrations This is why it's referred to as "the sweet spot". For example...shooting Medium Format glass on S35mm sensor (using just 25% of the glass!!!) pretty much guarantees you a degree of distortion free imagery that's very hard to replicate otherwise. Not sure how any of this affects CA, however.

Certainly cropping onto the SENSOR may exacerbate the camera's own anomalies, however.

But that's different...

 

[Bob Gundu]

Thanks Nick. That's what I was trying to say. In other words, cropping is just making any anomalies you may have at higher resolution more prominent at lower resolutions. But cropping is not causing those issues.

 

[Andy Maser]

Pretty sure that this is an issue I shouldn't really be seeing at any resolution. Some chromatic aberration is normal with digital sensors, but not like this.

 

[Matt Ryan]

Pretty sure that this is an issue I shouldn't really be seeing at any resolution. Some chromatic aberration is normal with digital sensors, but not like this.

It is NOT CA. It is a writing error. File a report with RED, email them your logs and these images. Something has gone wrong with writing to the ssd mag. It could either be a bad side ssd module or a bad redmag. Those are misaligned channels.

 

[sander kamp]

That definitely doesn't look like a lens problem. If it was caused by the lens it would gradually increase from the center of the lens and be worst at the edge but this just starts and stops at one clearly defined point. Better contact RED.

 

[Andy Maser]

Just sent a tech support message. Thanks, everyone.