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Why so little interest in RF 35mm F1.4 VC

  
 
Carlo_M
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p.4 #1 · Why so little interest in RF 35mm F1.4 VC


As a small followup, I used The Digital Picture's lens comparators and looked at the RF vs EF versions of the 50 1.2L and the 24-105 f/4 (I used the ver.II of the EF lens) and the improvements were pretty obvious to the naked eye.

24-105 f/4 comparisons
50 1.2 comparisons



May 26, 2026 at 02:59 PM
Toothwalker
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p.4 #2 · Why so little interest in RF 35mm F1.4 VC


campy wrote:
I think most would not be fixated at a $999 price point and not $1550. At $1550 I would expect very little correction to be needed.


At $1550 I would just expect good image quality, regardless of how it is achieved.


JohnDizzo15 wrote:
the images to do it which equates to clipping sensor data. They are pretty solid lenses at everything they do, but I didn’t like the feeling of being signed up for sensor size reduction via lens correction profiles. The salt on the wound is the fact that they’ve somehow managed to still modify the EXIF data to reflect full resolution/image size which is logically physically impossible. This is actually verifiable when you turn off profile correction and do manual corrections to match up the images.


What people call sensor resolution is just a measure of spatial sampling frequency. What matters for the end result is not sensor resolution but image resolution, namely the ability to resolve detail. The VCM lenses fare well in that department.


Steve Spencer wrote:
John there is one big difference between what modern lenses do at the wide end and what they could do at the long end. What we typically see these days with digital correction is that lenses are actually wider than what they report. They shoot at a wider angle and then purposedly correct for distortion and crop the image just a bit, but the lens is actually wider than what is reported. For example, in Stan's uncorrected example that is probably 22 to 23mm even though it reports 24mm because the camera is going to crop as part of
...Show more

The true focal length range of Stan's lens is 25-102 mm. Of course Canon is cheating a bit with the zoom range, but all manufacturers do that. The uncorrected image at the wide end has a larger field of view than the corrected image, but the focal length remains the same at 25 mm. Note that the relationship between focal length and field of view depends on the presence of distortion. The fields of view of a 16-mm fisheye lens and a 16-mm rectilinear lens are very different, but both are 16 mm.


JohnDizzo15 wrote:
Agreed that they’re not identical. My specific point/parallel was that both result in some cropping of the sensor. Also, it raises a bigger question for me in how far we’re willing to accept cropping at any end to achieve the equivalent/stated FL.


That willingness is very individual. For you Canon already went too far with the VCMs, whereas other people enjoy the compact size and superior (compared with their EF counterparts) overall image quality. Canon will know when they have gone too far when the masses stop buying.



May 26, 2026 at 03:22 PM
JohnDizzo15
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p.4 #3 · Why so little interest in RF 35mm F1.4 VC


Toothwalker wrote:
That willingness is very individual. For you Canon already went too far with the VCMs, whereas other people enjoy the compact size and superior (compared with their EF counterparts) overall image quality. Canon will know when they have gone too far when the masses stop buying.


Question is though, are people even aware that they’re being forced into not being able to utilize their full sensor when using these lenses? The part that bugged me the most was how Canon still baked into the correction profile that the image resolution is at 100% when it clearly isn’t. That is disingenuous at best. If they were being open about the loss, why not just let it be reflected in the actual resolution numbers?

Again, this is not only a loss in resolution, but a loss in sensor size which is really the part that is more bothersome IMO.



May 26, 2026 at 04:04 PM
patotts
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p.4 #4 · Why so little interest in RF 35mm F1.4 VC


Some of it was from memory from presentations I saw and read, but you are correct to doubt that Canon promised affordability in combination with the design features - at least not in writing (but I do recall having those discussions with Canon reps).









May 26, 2026 at 04:11 PM
Carlo_M
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p.4 #5 · Why so little interest in RF 35mm F1.4 VC


JohnDizzo15 wrote:
Question is though, are people even aware that they’re being forced into not being able to utilize their full sensor when using these lenses? The part that bugged me the most was how Canon still baked into the correction profile that the image resolution is at 100% when it clearly isn’t. That is disingenuous at best. If they were being open about the loss, why not just let it be reflected in the actual resolution numbers?

Again, this is not only a loss in resolution, but a loss in sensor size which is really the part that is more bothersome IMO.
...Show more

I'm aware, and for me, the results justify the means. Here's an old video I did comparing my now-sold RF 24-70 f/2.8L IS USM (one of the Holy Trinity) when I decided to go with the RF 35mm 1.4 VCM (and also bought a 20mm 1.4 VCM) for my medium and wide needs.


Sorry it's kind of a clumsily/hastily put together video, but basically I shot my test charts with both lenses and looked at the uncorrected and corrected versions. Yes the 35 VCM uses less of the sensor by virtue of needing more distortion correction. But the sharpness improvement is apparent both pre- and post-profile correction. It's around the 2m 20second mark of my video.

So I don't really care that I'm using less of the sensor if the end result is that the VCM lens is still sharper. And keep in mind the 35VCM was one of the ones that needed more distortion correction. The 50 and 85 VCMs are apparently much less distorted (close to their non VCM, f/1.2L counterparts). That's why I was happy to sell off my 24-70 and go with the 20 and 35 VCMs.

Recently I just sold off my RF 50 f/1.2L because it's focusing performance for videos is noticeably inferior to the VCMs, and I'll be picking up a 50 VCM shortly in its place.



May 26, 2026 at 04:58 PM
artsupreme
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p.4 #6 · Why so little interest in RF 35mm F1.4 VC


I would like to see some side by side comparisons of the EF 35II and the RF 35VCM to see what all the fuss is about. Had I not dumped my 35II I could have done the comparison myself but I don't have it anymore. I prefer the size/weight of the VCM and not once have I ever questioned the IQ of the VCM lenses as they all produce amazing results. One thing to note is that I also often prefer the images uncorrected, so I guess that's another positive that's not mentioned much, is that you have a "wider" uncorrected option as well, which theoretically could be a gain for those splitting hairs here. If people are that worried about a very small percentage of crop/correction, then they might like the small percentage gain on the wide end occasionally. I believe these lenses are a made at a little wider FL and then the correction gets them to the advertised FL.

Regardless of what's going with the correction or how much percentage these things are cropped, I believe the issues people have are conflicts within themselves, in that they think they are being robbed somehow. For what I shoot, I have never cared about edges or corners so none of this matters, but I would like to see examples of where the 35 VCM is short changing someone compared to the EF 35II in real world examples.



May 26, 2026 at 05:11 PM
JohnDizzo15
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p.4 #7 · Why so little interest in RF 35mm F1.4 VC


To clarify, I fully understand where happy users are coming from. It serves the need and does it effortlessly while meeting the threshold of IQ that you deem good for you. I know, because I bought the lens myself as I was hoping to really love it. The lens was plenty sharp, focused amazingly well, and generally got the job done. But I wasn't in love with the images. Again, I recognize that this is entirely subjective.

I only raise the issue on the sensor cropping required because I think it is a bad business practice on Canon's part to not give full disclosure. If you are content with the lens, I am content for you. But that doesn't negate the logic of the business practice employed here. What other part of the marketplace for any other product we might need or want would we be okay with a company deciding for us that we didn't need to fully utilize something while not fully disclosing that to the consumer? To add some salt, the company selling said item then takes additional steps to hide that information from the consumer after the fact.

Again, if Canon believed this was good business practice, why obscure the actual data electronically so that we are none the wiser?



May 26, 2026 at 05:46 PM
Carlo_M
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p.4 #8 · Why so little interest in RF 35mm F1.4 VC


patotts wrote:
Some of it was from memory from presentations I saw and read, but you are correct to doubt that Canon promised affordability in combination with the design features - at least not in writing (but I do recall having those discussions with Canon reps).

I could imagine that happening especially on an informal/verbal basis. Maybe it's bit them in the behind too because the last time my local shop (Samy's) had Canon reps, I tried to ask some probing questions about upcoming product release strategies (not even about specific lenses or cameras, more like "ever thought of putting out a lens that bridges the gap between $3K and $10K like Nikon has?) and they were very cagey and non-committal.



May 26, 2026 at 05:46 PM
Carlo_M
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p.4 #9 · Why so little interest in RF 35mm F1.4 VC


artsupreme wrote:
I would like to see some side by side comparisons of the EF 35II and the RF 35VCM to see what all the fuss is about. Had I not dumped my 35II I could have done the comparison myself but I don't have it anymore. I prefer the size/weight of the VCM and not once have I ever questioned the IQ of the VCM lenses as they all produce amazing results. One thing to note is that I also often prefer the images uncorrected, so I guess that's another positive that's not mentioned much, is that you have a "wider"
...Show more

In addition to your point about maybe occasionally preferring the uncorrected image, there's also the possibility of a middle ground - that being a "corrected to taste" image. A photographer can decide how much distortion and vignette to correct. Personally I don't do it (I am one of those who are okay with the default lens profile correction) but it's an option for those who might want to tinker.

I do agree that for some folks, some of this feels like "we're being robbed". Just like they can't force me to feel robbed, I can't force others into not feeling robbed. I can only present what I view as the pros which, for the VCM lenses, outweigh the cons for my use cases. Others will feel differently and that's okay. No manufacturer can please everyone, and ultimately the market will have its say as to whether the VCMs are a hit or a miss.

Also, here you go. The RF35 VCM vs. the EF 35 1.4 II (and the RF 35 1.8 thrown in for good measure)



---------------------------------------------

JohnDizzo15 wrote:
To clarify, I fully understand where happy users are coming from. It serves the need and does it effortlessly while meeting the threshold of IQ that you deem good for you. I know, because I bought the lens myself as I was hoping to really love it. The lens was plenty sharp, focused amazingly well, and generally got the job done. But I wasn't in love with the images. Again, I recognize that this is entirely subjective.

I only raise the issue on the sensor cropping required because I think it is a bad business practice on Canon's part to
...Show more
I guess my question is: what do you define as full disclosure, and what company does it? In my view, most advanced photographers who care know that lens profiles exist, and what they do. And in the 3 years since I've re-entered the hobby, the prevalence of gear preview/initial review on the web (review sites, youtubers, etc.) is off the charts. I knew the VCMs were being corrected well in advance of their release dates. As I mentioned before, lens profiles and correction are not new, and haven't been broadly advertised before by any manufacturer.

Heck, Leica for their Q3 line doesn't even let you see what the uncorrected result looks like. When I load my Q3 monochrome pics into Lr/PS it warns me that the result already includes manufacturer in camera corrections but unlike Canon, doesn't allow me to toggle them on/off. But every person I've shown them to has loved the results.

With regards to you "not being moved as much" I will say this: when I get my 50 VCM, I am prepared to "not be moved as much" in comparison to some of the shots I took on my now-sold 50 1.2L. But I'm betting that's going to be due to the small amount of bokeh quality loss going from f/1.2 to f/1.4. But I know based on a bunch of reviews I've seen, that the VCM is going to be as sharp, if not sharper, across the frame, and needing only a smidge more correction...but I'll also know that it will focus 3-4X faster (the f/1.2 had to move a lot of glass and it let you know visibly and audibly that it was quite a task to do so) and that it will have almost no focus breathing and be a stellar performer on video AF and tracking so that I'm prepared to not be as blown away by the bokeh rendering in exchange for all those other features. And keep in mind the MSRP is $1K less for the VCM. If one were only a portrait photographer with zero video needs, and didn't mind the slower, noisier AF, and just needed that last extra oomph from the better bokeh, then by all means go with the 50 1.2. But for anyone who doesn't fit that category, the 50 1.4 VCM is in my view the better lens and it's less expensive and lighter/easier to carry around.



May 26, 2026 at 06:14 PM
stanj
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p.4 #10 · Why so little interest in RF 35mm F1.4 VC


Carlo_M wrote:
Heck, Leica for their Q3 line doesn't even let you see what the uncorrected result looks like. When I load my Q3 monochrome pics into Lr/PS it warns me that the result already includes manufacturer in camera corrections but unlike Canon, doesn't allow me to toggle them on/off.


I think that's more Adobe not letting you turn off those settings. Same with my RX100. Apps like DXO or even Apple's Preview will show you the uncorrected image; I am sure there's a ton more such apps (and command line tools).



May 27, 2026 at 11:20 AM
 


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Carlo_M
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p.4 #11 · Why so little interest in RF 35mm F1.4 VC


stanj wrote:
I think that's more Adobe not letting you turn off those settings. Same with my RX100. Apps like DXO or even Apple's Preview will show you the uncorrected image; I am sure there's a ton more such apps (and command line tools).


Interesting. Sadly I'm in the Adobe ecosystem so I won't be paying for another software unless/until I move away from Adobe (I get a discount through work). Odd though that the toggle to add/remove the profile correction is available for Canon RAW (and I assume the other major brands, I only own Canon though so I can't confirm) but somehow not available for Leica.

How do you remove it on Apple Preview? I couldn't find any options to do so in the menus, and I googled how to do it and was met with this response via Google's AI (which admittedly can often be wrong, or provide partially correct information):
Apple Preview does not have a built-in toggle to remove or disable camera lens profiles, as it only displays RAW or baked-in corrections applied by your iPhone or camera. To remove a lens profile, you need to turn off lens correction on your iPhone before shooting, or use third-party photo editing software.



May 27, 2026 at 12:04 PM
stanj
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p.4 #12 · Why so little interest in RF 35mm F1.4 VC




You don't remove it; it doesn't have it Images load without correction, if they load at all. That's how I got the 24-105 sample above in this thread.



May 27, 2026 at 12:41 PM
JohnDizzo15
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p.4 #13 · Why so little interest in RF 35mm F1.4 VC


Not sure where the post went. But I was reading one earlier this morning on the can that was in response to me regarding my misunderstanding of the loss of sensor coverage area, which I couldn't reply to until just now (only to no longer be able to find the post). To clarify, it was my mistake/memory failing me. I was conflating some of my issues with some of the other RF lenses that are actually full-blown black along the edges and corners with the 35. The 35 is in fact one of the lenses that covers the sensor and only loses that coverage area due to the distortion correction vs. no coverage at the edges and corners.

Some of the other notable lenses, with the 24-105/2.8 being one of the worst offenders at 24mm as @stanj showed in his uncorrected image, along with the 14-35/4L and 24-240. All 3 of these required clipping of the blacks to get to the wide end which is one of the reasons I dumped them. Another one I had that required significant corrections was the 16/2.8 which needed heavy clipping of the image to apply profile corrections if you didn't want it to look like a fisheye. Come to think of it, the same fishy issue was also present with the 24 VCM.

Regardless, it is still a significant enough portion of the sensor data that is cropped in order to achieve the final image output with the 35 along with the other lenses I have mentioned albeit emanating from 2 different reasons depending on the lens.

I actually wanted to see how much was being clipped with the 24-105z when I had it, and it amounted to about 7mp resolution loss on my R5ii. The final image when I manually corrected to match the profile left me with an image that was roughly 7500x5000 instead of 8192x5464 (not smart enough to quantify how much of the sensor area that accounts for). Again, the funny part is that LR still shows 8192x5464 with the profile correction applied. Not cool.

Also to be clear, I am not attempting to dictate what others should or shouldn't find acceptable. Just sharing my experience/findings and reasons for why I no longer own the lens/es. YMMV



May 27, 2026 at 01:12 PM
Carlo_M
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p.4 #14 · Why so little interest in RF 35mm F1.4 VC


Yeah there were some posts that disappeared, maybe a forum hiccup.

I know of the phenomenon that you speak, where certain lenses image circle doesn't fully cover the sensor, it's usually if I recall the super-wide angle ones, but don't quote me on that. All the lenses that I own do not have dark/black areas in the corner, they just need vignette correction (and again, if you look at the 50VCM vs 50 1.2L and 85VCM vs. 85 1.2L - the latter of which are among the most celebrated Canon lenses in the RF line) even the venerable Ls needed vignette correction and a certain amount of distortion correction.

And as I showed in my video above, I fully recognize that the barrel distortion of the 35 VCM requires a significant amount of correction, but even after correction, the results were still sharper than the results from the 24-70 f/2.8L IS USM. If the results had been worse, I would have been very vocal in my criticism, but once I realized that the corrected VCM output resulted in better sharpness, that's when I made my peace with it.



May 27, 2026 at 01:33 PM
Steve Spencer
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p.4 #15 · Why so little interest in RF 35mm F1.4 VC


JohnDizzo15 wrote:
Not sure where the post went. But I was reading one earlier this morning on the can that was in response to me regarding my misunderstanding of the loss of sensor coverage area, which I couldn't reply to until just now (only to no longer be able to find the post). To clarify, it was my mistake/memory failing me. I was conflating some of my issues with some of the other RF lenses that are actually full-blown black along the edges and corners with the 35. The 35 is in fact one of the lenses that covers the sensor and
...Show more

Let me help with the math. A 7500 X 5000 image is a 1.085X crop from the FF R5 II sensor. Not really a big crop at all and still gets you 38 MP, but keep in mind the camera might do better than you can do manually. It can adjust distortion better than most of people can manually and in doing it better it might well allow a smaller crop of the image. Even your 1.085X crop would just take the image being 22mm to get the look of a 24mm image. If as Toothwalker suggests that 24-105 is really a 25-102 then it would just take a 23mm image. That might not be acceptable to you, but it will be to lots of other people. I know it would be to me, because I never worry about such small crops. Of course you can and it seems like you do care about that, but this is an issue on which I think we can both have reasonable takes but still disagree.



May 27, 2026 at 01:54 PM
JohnDizzo15
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p.4 #16 · Why so little interest in RF 35mm F1.4 VC


Steve Spencer wrote:
Let me help with the math. A 7500 X 5000 image is a 1.085X crop from the FF R5 II sensor. Not really a big crop at all and still gets you 38 MP, but keep in mind the camera might do better than you can do manually. It can adjust distortion better than most of people can manually and in doing it better it might well allow a smaller crop of the image. Even your 1.085X crop would just take the image being 22mm to get the look of a 24mm image. If as Toothwalker suggests that 24-105
...Show more

Agreed.

Sharing these just so we can all visually determine whether it is significant to each of us. Note the loss on each side of the frame.

24-105z uncorrected at 24 by Johndizzo15, on Flickr
24-105z profile applied at 24 by Johndizzo15, on Flickr




May 27, 2026 at 02:10 PM
melcat
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p.4 #17 · Why so little interest in RF 35mm F1.4 VC


JohnDizzo15 wrote:
Not sure where the post went. But I was reading one earlier...


That was my post. On rereading it, I decided the second part was misleading. I didn’t have time to fix it, so deleted it instead.

The first part addressed the loss of light caused by the cropping, and was correct. In that post I assumed the geometric correction cropped 15% of the sensor area. That’s 1/8 of the sensor area. If it was 1/2, you’d lose 1 stop of dynamic range, so 15% loses you 1/4 stop. That’s a real effect, but not very significant. That’s of the order of the amount lost with lenses whose T-stop differs from their f-stop that no-one seems upset about.

In the second part of the post I addressed your concerns about resolution loss by trying to explain what resampling was. The word was used in an earlier post but I think you didn’t understand its significance. It means to turn a digital signal (e.g. pixels) into analogue, then back to digital. The implication in this context is that to correct geometric distortion you don’t shift the pixels about as is, but you turn it into an analogue function of position on the sensor, and then stretch this image. (If you just moved the pixel values into different pixel locations, you’d end up with aliasing. Instead, you must use interpolation, which is done with calculus.)

So now you have the image as a function of position, but the user wants it as a TIFF or JPEG or to print it out, so it has to be turned back into pixels again. How many pixels should there be? Clearly, at least as many as were on the sensor, because that’s the luminance resolution in the middle of the sensor, where the image wasn’t stretched to fix the distortion. Since that’s the minimum possible, that’s what raw converters use as a default. But they aren’t the original pixels – indeed, the camera doesn’t really have pixels, but photosites, each of which is red, one of two greens, or blue.

Again, the funny part is that LR still shows 8192x5464 with the profile correction applied. Not cool.

I hope this post explains why Adobe had no choice but to do this.



May 28, 2026 at 03:43 AM
artsupreme
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p.4 #18 · Why so little interest in RF 35mm F1.4 VC


JohnDizzo15 wrote:
Agreed.

Sharing these just so we can all visually determine whether it is significant to each of us. Note the loss on each side of the frame.

https://live.staticflickr.com/65535/55298024890_d52f21bffb_b.jpg24-105z uncorrected at 24 by Johndizzo15, on Flickr
https://live.staticflickr.com/65535/55296698182_5bb5ca3890_b.jpg24-105z profile applied at 24 by Johndizzo15, on Flickr



As long as what you see through the EVF is the second/bottom image then I have no problem with it because what you see through the EVF is what you get. It's not as if it's promising a wider image through the EVF and then gives you a cropped output that's smaller than what you saw when you took the photo.

I just did a quick and dirty test of my 35VCM compared to my RF 24-70 f/2.8 at 35mm and the 35VCM appears to be more of a 32-33mm lens. I tested both f/2.8 and even the corrected 35VCM image is noticeably wider than my 24-70 @ 35mm. The uncorrected 35VCM image is also very usable as well, which I often prefer over the corrected version. I don't know what the actual FL equivalent is of the 35VCM is uncorrected vs corrected but I'm sure someone here can chime in?



May 30, 2026 at 11:37 AM
rscheffler
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p.4 #19 · Why so little interest in RF 35mm F1.4 VC


melcat wrote:
That was my post. On rereading it, I decided the second part was misleading. I didn’t have time to fix it, so deleted it instead.

The first part addressed the loss of light caused by the cropping, and was correct. In that post I assumed the geometric correction cropped 15% of the sensor area. That’s 1/8 of the sensor area. If it was 1/2, you’d lose 1 stop of dynamic range, so 15% loses you 1/4 stop. That’s a real effect, but not very significant. That’s of the order of the amount lost with lenses whose T-stop differs from their f-stop
...Show more

Last year I noticed with 24-105Z images shot at around 24mm that Lightroom/Adobe didn't apply the same kind of distortion correction philosophy to images from this lens and focal length that Canon did. Canon appeared to pin/lock the center of the image, which did not change after corrections had been applied, whereas Adobe appeared to use somewhere in the mid zone of the image from which to flow out distortion corrections. The result was that subject content in the very center of the image became slightly smaller than the same images with Canon's corrections applied. Additionally, Adobe's correction resulted in a slightly wider angle of view. It would likely be necessary to compare Adobe's corrections against Canon's for every RF lens, and for zooms, across the zoom range, to determine how faithful Adobe's corrections are to Canon's. If Adobe's approach to the 24-105Z @ 24mm is typical, then it would seem that Adobe may have a different philosophy about how to correct distortion.

Here's a GIF animation of Canon's in-camera correction (the flat looking image), Adobe's interpretation (slightly wider angle of view) and the uncorrected image exported from Lightroom.



Here is each image individually:







Here's the 20 VCM at the same venue, but different time. You'll note that with this lens the LRC/Adobe correction is very close to Canon's in-camera correction but with slightly less 'stretching' of the image in the corners, which I prefer.

Canon SOOC in-camera correction first, then LRC correction, then LRC corrections disabled.







I just revisited the 20 VCM images I edited from the above event and reprocessed most of them with somewhat less distortion correction in order to get slightly wider angles of view than with full correction applied. I prefer how less stretched content in the image periphery looks and with this venue, most of the images effectively hide the lens's native barrel distortion, making this a viable editing option.




May 31, 2026 at 11:12 PM
Ulff
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p.4 #20 · Why so little interest in RF 35mm F1.4 VC


Distortion correction is essential to me, because I mainly shot architecture. When I experimented with different work flows of distortion correction for a few RF wide angle lenses I tended to prefer the results from DXO Pure Raw, which again slightly differ from Canons and Adobes corrections (e.g. they often crop less into the image).

That said, my standard work flow nowadays is based on Adobe profile corrections. Sometimes, when a slightly wider crop is more important for me than perfect distortion correction, I apply the standard profile in LR or Camera Raw and make good use of the "Scale" Slider to zoom out a bit. With this method I'm able to gain a few mm (how much depends on the specific lens) for a wider viewing angle without giving up distortion correction. The distortion correction isn't necessarily perfect in the far corners of the corrected image, but it's often the best compromise of the best correction in 99% of the frame and the widest possible view.



Jun 01, 2026 at 01:40 AM
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