todd_shaner_6660895's profile
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2.4K Messages

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39.2K Points

Wed, Jul 8, 2015 7:27 PM

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Lightroom/Camera Raw: Canon EF16-35mm f/4L IS Lens Profile Distortion Control Incorrect

The Canon EF16-35mm f/4L IS lens profile Distortion control is incorrect over most of the focal range. At 16mm the correction looks good. As the focal length increases the lens profile over-corrects the image causing pin-cushion distortion that gets progressively worse. It is most notable at the 35mm extreme focal length. Here's an example shot with this lens at 35mm on a Canon 5D MKII with Lens Profile Distortion settings of 0 and 100:



This issue was also reported here:
https://forums.adobe.com/message/6698...
https://forums.adobe.com/message/7655...

Official Solution

Adobe Administrator

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16K Messages

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296.7K Points

6 y ago

This was fixed in Camera Raw 6.4 & Lightroom 6.4/CC.

7 Messages

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186 Points

7 y ago

Same problem with 16-35 f/4L IS USM lens and Canon 1D X camera body.

1 Message

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60 Points

7 y ago

Yeah, here as well on a 6D. Please solve. Using the 16-35 2.8 II profile as a workaround is not very pleasant for architectural photography, because althougth the barrel/pillow is gone, the lines are not straigth nevertheless. For professional use its a bit of a nightmare.

7 Messages

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186 Points

7 y ago

16-35 f/2.8L USM profile is a different story. It fixes distortion at the edges only for some focals, but leaves barrels toward the center of image. Currently there is no workaround.

52 Messages

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818 Points

6 y ago

Where is Adobe on this and why have they not released a more accurate profile? For architectural work this is unacceptable. This lens is very attractive, but my reliance on Adobe Camera RAW/LR to fix distortion combined with the virtually worthless profile means that I will have to spend additional time with 3rd party software on every shot. I wonder if it would make sense to try a different raw processing engine....

7 Messages

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186 Points

6 y ago

I heard this Canon lens has a great profile with DxO Optics Pro software and with C1 Pro. I will try them both and I'll let you know.

3 Messages

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30 Points

6 y ago

Same problem here. The ACR lens profile for 16-35mm f4 creates additional geometrical distortions and the vignetting is a bit overcompensated. Using profile for 16-35 f2.8 is not a viable solution.

Have anyone found a workaround or a custom made profile for this lens for full frame cameras?

This is a very popular lens but I can't find any mentioning of this problem searching photography forums other then this one. Are owners of this lens all happy with the profile and possibly something wrong with my setup?

The only relevant profile I can find in the ACR lens profiles folder is this (ACR 91.1.):
Canon EOS-1Ds Mark II (Canon EF 16-35mm f4L IS USM) - RAW.lcp

Any ideas would be much appreciated.

Champion

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2.4K Messages

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39.2K Points

6 y ago

From 20mm through 35mm the distortion is pretty low and not visible in most pictures. A temporary workaround until Adobe fixes the lens profile would be to only apply lens profile distortion correction to images shot at less than 20mm focal length. Use the Library filter as below, Select All images, apply the Lens Profile Distortion setting to the Most Selected image, and then Sync just 'Lens Profile Corrections.'

7 Messages

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186 Points

6 y ago

Todd,

the profile has been incorrect since introduction of this Canon lens... It has been available for a year now. What do you mean by "temporary workaround"?
For certain types of photography this is not a solution.

3 Messages

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30 Points

6 y ago

Thank you for the suggestion Todd but I find that for architectural photography the current profile leaves to much of distortion even at 16-20mm range. At 35mm it is pretty bad.

Let's keep this thread alive to point Adobe's attention to this problem.

I've downloaded Adobe Lens Profile Creator to create my own profile but it seems it will take a day and hundreds of shots to create a quality lens profile. (6 focal length positions) × (3 focus distance positions) × (4 aperture positions) = 72 image sets of 9 photos each.

It would be great if someone who have already done this could share their created profile or offer it for sale.

Champion

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2.4K Messages

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39.2K Points

6 y ago

Yuriy, I'm seeing pretty good correction in the 16-20mm range with the Distortion correction set to 100. I'm beginning to wonder if there are some bad lens samples that have an assembly error that causes different distortion characteristics.

Can you post a raw file to Dropbox or other file sharing site that exhibits distortion at 16-20mm with Lens Profile applied at 100 Distortion setting?

3 Messages

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30 Points

6 y ago

Todd, sorry, I can't share photos taken for a client and don't have other shots as I just got the lens. I can see some minor barrel distortion in the middle at 16mm with the current profile applied. The edges seem to be almost OK. Also I need to reduce the vignetting 7-10% as the edges are too bright after the correction on my copy of the lens. Anything above 24mm has some added pincushion distortion as on your sample.

When I have time to find and shoot a brick wall, I will post it here.

I still can't believe that after a year on the market nobody created a decent profile for this very popular and highly praised in reviews lens.

Champion

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2.4K Messages

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39.2K Points

6 y ago

Yuriy, right-click on the picture I posted to launch it, left-click on it, and select 'Save Image as.' There is no visible distortion anywhere. View it inside LR. Keep in mind the objects you are looking at are far from perfectly aligned straight and square.

Concerning over correction I set my Lens Profile "default" Vignetting at 50 to 70 depending on the lens and Distortion at 0 for all. I only adjust them higher if a specific shooting session subject requires more correction. In fact for many subjects shot at the widest (16mm) zoom setting the barrel distortion produces a more pleasing image with less exaggerated corner stretching and elongation, especially of people in group shots.

Please let us know when you complete the lens profile and have uploaded it using the Adobe Lens Profile Creator. I agree it's no easy task–Thank you.

5 Messages

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112 Points

6 y ago

Same problem here. I do a lot of real estate work and above 20mm the pin-cushion distortion is noticeable. I'm curious as to why this hasn't been addressed in the lens correction yet? I've attached an image showing the problem. The close wall on the right side is clearly not corrected with the lens profile.

1 Message

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60 Points

6 y ago

I have the same problem.

I'm using the F4 IS Lens on a Canon 5DS. The lens is recognised in Camera Raw 9.1.1 but the auto lens correction doesn't work and the distortion remains. I am an architectural and interiors photography so having to manually correct every image using the Lens Correction filter in photoshop is very time consuming