Lightroom/Camera Raw: SONY FE Samyang AF 24mm F2.8 Lens Profile Distortion Control Incorrect

  • 1
  • Problem
  • Updated 5 months ago
  • In Progress
(Camera raw 11.2)

Lens profile over-corrects the image causingpincushion distortion that gets worse. 


镜头配置文件过度校正图像,导致枕形失真更糟糕了。


OFF:


ON:








When using Upright automatic perspective correction, this problem is more obvious and thus easier to detect.Upright does not work at this point.

使用Upright自动透视校正时,这个问题更加明显并且比较容易被发现。此时Upright无法正常工作。




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yukeng guo

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Posted 6 months ago

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Photo of Rikk Flohr

Rikk Flohr, Official Rep

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The Amount Slider is normally set to 100% of distortion correction. You may want to try adjusting the slider to find the sweet spot for your lens. It is provided for the purpose of increasing or decreasing the profile distortion.
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yukeng guo

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I used AF 24mm F2.8 to shoot a lot of buildings, which is a very serious problem for me.
我使用AF 24mm F2.8拍摄了大量的建筑,这个问题对我来说非常严重。


The lens displays pretty complex distortion.Manual try adjusting the slider does not correct straight lines.
这个镜头显示出相当复杂的失真。手动调节滑块无法校正出平直的线条。

I can provide a square grids picture taken with AF 24mm F2.8. I hope you can try it.
我可以提供一份使用AF 24mm F2.8拍摄的网格图,希望你能尝试一下。

https://1drv.ms/u/s!AvaxnUv2covPg2LV3JfFXveXRz5w




Thanks you.



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Rikk Flohr, Official Rep

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I spoke to the Camera Raw engineer in charge of Lens Profiles and we've opened an issue to review this profile. Thanks for reporting it. 
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yukeng guo

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Thank you for your answers. I look forward to the new version of ACR.^_^
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Todd Shaner, Champion

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Rikk, on my system with LR 8.2.1 it's showing as 'Built-in Lens Profile applied.' I don't see that in the OP's screenshot. If that's correct then there should be no need to check 'Enable Profile Corrections,' which would double-apply profile corrections. With it unchecked it appears Distortion a correction is applied, but no Vignetting correction. Using RawDigger the file appears to have very little distortion and it does not apply profile corrections.  Something's not right with the built-in lens profile or it isn't actually being applied in-camera (bogus detection).

UPDATE: Just checked the lens profile info (i) and it's only applying chromatic aberration correction. The lens profile does need to be enabled so clearly is incorrect.




(Edited)
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yukeng guo

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Thank you for your answers. I look forward to the new version of ACR.^_^
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Rikk Flohr, Official Rep

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Is it possible for you to share this raw file with me?