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PhotographyFan
Participating Frequently
September 3, 2013
Question

Fuji X100s Lens Corrections in LR5

  • September 3, 2013
  • 3 replies
  • 19742 views

I keep hearing conflicting reports about how Lightroom handles lens corrections for the Fuji X100s.  Some say you need to use the X100 profile while others say that Lightroom applies the corrections automatically, behind the scenes, based on info embedded in the raw file itself and that selecting the X100 profile would only "double up" on the corrections.  Others have said that there is no X100s profile yet but NOT to use the X100 profile because it might make things worse since the sensor has changed and the new X-Trans sensor and lens combination would likely need different corrections than the old one.

Some clarification would be really appreciated.

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      3 replies

      C
      cannikin
      Participant
      January 6, 2015

      Have there been any updates on this matter? I've got an X100T and similar to the posts above, I don't know if the corrections are being applied automatically or not. If so, and I turn on "Enable Profile Corrections" then presumably I'm doubling-up on my corrections. I'll have to try the white-wall and repeating-pattern experiments to see if I can visually make out any distortion after a plain vanilla import. But if someone's already figured out the answer then you could save me some trouble.

      I'm on Lightroom 5.7.1.

      ssprengel
      ssprengel
      Inspiring
      January 7, 2015

      Open your images in something like RawTherapee which doesn’t apply any lens corrections and see if the distortion is different than what you see in LR.

      http://www.rawtherapee.com/

      DdeGannes
      Community Expert
      DdeGannesCommunity Expert
      Community Expert
      September 3, 2013

      This camera has a fixed prime lens 35mm. If the camera manufacturer is not making lens correction in producing the jpeg then it is so by design. There should be little if any correction necessary.

      Regards, Denis: iMac 27” mid-2015, macOS 11.7.10 Big Sur; 2TB SSD, 24 GB Ram, GPU 2 GB; LrC 12.5,; Lr 6.5, PS 24.7,; ACR 15.5,; (also Laptop Win 11, ver 24H2, LrC 15.3; PS 27.0; ) Camera Oly OM-D E-M1.
      ssprengel
      ssprengel
      Inspiring
      September 3, 2013

      If you have an X100s camera, yourself, you should be able to confirm whether LR is doing its own corrections behind the scenes:

      Take a raw and a jpg of a regular pattern like bricks or graph-paper, and then look to see if the raw looks similarly corrected compared with the camera JPG assuming corrections are turned on in the camera.

      Do the same pair of shots of a blank, light-colored, evenly-lit wall and see if the vignetting correction is applied to both the raw and the jpg. Wide-angle probably would show more vignetting than zoomed in.

      Currently, with the profiles that installed with LR 5.2 RC, there is an X100 lens profile for but no a profile with X100s in its filename.

      P
      PhotographyFanAuthor
      Participating Frequently
      September 3, 2013

      I have done this and initially concluded that Lightroom was doing corrections behind the scenes because the raw and jpeg looked the same distortion-wise but then was told by someone on another forum that the out of camera jpegs do not have any corrections applied to them.

      So, it would be really nice to hear what Adobe has to say about it.

      Todd Shaner
      Todd Shaner
      Legend
      September 5, 2013

      Eric,

      Do you agree that Lightroom/ACR is, in fact, not correcting X100s lens distortions to any noticeable degree?  If so, do you agree that trshaner's recommendation to apply the X100 profile minus the vignetting correction would offer the most complete corrections? And if I use this method do I then need to enable "Remove Chromatic Aberration"?  Is there any reason, from an image quality standpoint, that one should not use the X100 profile sans vignetting correction with X100s raw files?

      The more I read this thread (and others elsewhere) the more I am confused as to what is really going on with this whole issue.  If the X100 profile without the extra vignetting correction works well with the X100s (seems to to me, but I would love to hear why it shouldnt be used if there is a reason) why not just create an X100s profile based on the X100 profile and make it available?

      The mystery is killing me.


      I'm not sure you will get a response from Eric Chan for the reasons ssprengel listed in post #26.

      Vignetting and rectilinear distortion correction to make your digital camera images "100% perfect" is generally unnecessary and can even degrade the image quality.

      Distortion Correction Cons

      1) Crops the image to maintain straight image borders–You lose  the image peripheral area that is corrected. Wide and ultra-wide zoom lenses generally have significant barrel distortion. Applying 100% correction "effectively" increase the focal length, which means that expensive 12-24mm zoom lens may provide something closer to a 14-26mm lens.

      2) Wide angle lenses generally exhibit barrel type distortion, which actually helps to reduce corner and edge "stretching." By correcting this distortion to make it 100% "geometrically correct" the elongation will become more noticeable. In fact there is software available that can apply "non-rectilinear correction" (volume anamorphosis) to wide angle images to remove some of the elongation. This "added distortion" can actually improve certain images (i.e. people pictures). Good information here:

      http://forums.adobe.com/message/4516863#4516863

      As Eric outlined at the above post you can simply use the 'Manual' Lens Corrections Distortion slider to add barrel distortion.

      http://feedback.photoshop.com/photoshop_family/topics/correct_stretching_effect_from_an_ultra_wide_angle_lens

      Vignetting Correction Cons

      1) Most people are accustomed to seeing some vignetting in photographs and in fact vignetting is sometimes "added" to images to focus attention on the central subject.

      2) Wide and ultra-wide angle lenses usually exhibit significant vignetting especially at wide apertures, which can be as much as -3EV. You will need to apply +3EV of exposure compensation in the extreme corners to achieve 100% vignetting correction. This will significantly raise shadow noise and can also reduce image quality due to lens defects such as astigmatism, and coma.

      So what should you do with your FinePix X100s raw images? See 'SUGGESTION to the OP' in my post #23...no sense retyping it here.

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