Chromatic aberration problem on Sony A7rii

[Gripeshots]

Hi everyone,

I'm getting extremly chromatic aberration when I shot an object with the sky in the background. Look at the tree, it become green and red.

I don't know if its a sensor problem, maybe the lens(Sony 50mm 1.8) or just a problem with all the Sony A7rii, but its pretty scary.

The picture I'm talking about:

https://www.dropbox.com/s/aygvesze1ohvqqi/Tree.jpg?dl=0

I would be really thankful if someone knows anything.

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[paulowen_2000]

These issues tend to be a feature of a particular lens. Most lenses will have some form of chromatic aberration that's why there are lens profiles in software like Lightroom to remove it. I use A7RII bodies and have seen this problem when using some (cheaper) lenses. Only by using expensive lenses do I find that the problem no longer exists. Basically, cheaper made lenses tend to suffer from image issues.

[XKAES]

A couple of other points to consider -- other than cheap glass.  First, all lenses suffer from some degree of chromatic aberration.  Faster lenses have more of it.  For example, a 50mm f2.0 will have less than a 50mm f1.2.  This can be reduced by stopping down the lens two or three f-stops.  Even inexpensive lenses usually produce good results if stopped down.

Also, magnification, magnifies the problem. A 50mm on a full frame camera will show less than on an AP-C camera, since the image is magnified on the non-full-frame camera.  Likewise, if you crop the image (post exposure), the abberation will appear more pronounced.

Third, always use a lens shade, and good quality filters.

Try these out before blaming the lens or the camera.

[Gripeshots]

5 hours ago, paulowen_2000 said:

These issues tend to be a feature of a particular lens. Most lenses will have some form of chromatic aberration that's why there are lens profiles in software like Lightroom to remove it. I use A7RII bodies and have seen this problem when using some (cheaper) lenses. Only by using expensive lenses do I find that the problem no longer exists. Basically, cheaper made lenses tend to suffer from image issues.

Thanks fo the answer! I tried to correct the chromatic aberration with lightroom, and it didn't work. Maybe its too much..

[Gripeshots]

1 hour ago, XKAES said:

A couple of other points to consider -- other than cheap glass.  First, all lenses suffer from some degree of chromatic aberration.  Faster lenses have more of it.  For example, a 50mm f2.0 will have less than a 50mm f1.2.  This can be reduced by stopping down the lens two or three f-stops.  Even inexpensive lenses usually produce good results if stopped down.

Also, magnification, magnifies the problem. A 50mm on a full frame camera will show less than on an AP-C camera, since the image is magnified on the non-full-frame camera.  Likewise, if you crop the image (post exposure), the abberation will appear more pronounced.

Third, always use a lens shade, and good quality filters.

Try these out before blaming the lens or the camera.

Thank you very much for the answe! I'll try with a lens shade and a good filter. I was pretty scared it could be something about the sensor..

[paulowen_2000]

Regarding using a hood and filter, the hood will prevent flare or colours washing out to some  degree but I cannot see how adding a filter will reduce chromatic aberration? My understanding is that this issues is a feature of the physical design and construction of the lens and its inability to focus all wavelengths of light at a given spot? Adding another piece of glass (filter) to the design will have little or no effect on correcting this issue? Please don't hold me to this! Just my thoughts!

[XKAES]

Sorry I wasn't more clear.  I wasn't suggesting that a filter could correct CA, I was suggesting it can cause it.  To potentially solve this problem, it's best to use a high quality filter -- or none at all. 

As to the hood, since the sun is in the scene, a hood would not help in this instance, but it can when it is outside of the picture.