Leica Perspective Control (LPC)

[SrMi]

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Here is a test image from my recent trip to Prague.  In Lightroom's Transform tab, I have applied Off, Auto, or Guided (LPC) correction. In this example, Guided (LPC) is the best. I have seen rare cases where Auto is better than Guided.

 

Off:

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Auto:

Guided (LPC):

Edited June 22, 2024 by SrMi

[gdb]

Hi SrMi

Very instructive comparison! It is obvious that the LPC shot is the best, at least for me because I appreciate the vertical lines to remain vertical : both "Off" and "Auto" corrections are to me good shots. But in LPC, I feel like strolling in this old street and I like that very much…

Congratulations ! As soon as my SL3 is paid, I’ll try to find a 24mm Super-Angulon !

Cheers

Gérard

[Gianfranco Piovano]

PC is one of the two reasons why I did change from Canon R6 + LAowa 20 zero D shift to Leica M11-P: the chance to apply PC on every lens I use.

Actually I am using with profit with Leica Super Elmar 21 and with Voigtlander 50 f2 Apo Lanthar.

Unfortunately I am not having good results with Voigtlander Hyper Wide 10 f5,6: I am looking for the right choice of lens manual choice as 6bit coding is not available for Voigt 10.

Fot 50 Apo LAnthar I am using the Summicron f2, as I do not find the Summicron Apo Asph in the M11-P list (that should be more right). 

any suggestions for Voit 10 and Voigt 50?

thanks in advance. GFP

[lct]

3 hours ago, Gianfranco Piovano said:

Unfortunately I am not having good results with Voigtlander Hyper Wide 10 f5,6: I am looking for the right choice of lens manual choice as 6bit coding is not available for Voigt 10.

Fot 50 Apo LAnthar I am using the Summicron f2, as I do not find the Summicron Apo Asph in the M11-P list (that should be more right). 

any suggestions for Voit 10 and Voigt 50?

• The wider Leica lens profile is 16mm (WATE). Coding your CV 10/5.6 as such should get you more or less a 16mm corrected i mage. It is the way it seems to works with my CV 12/5.6 at least.
• The code of the Summicron 50/2 apo is 101001. See below.
Happy snaps 🙂

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[Gianfranco Piovano]

Thank you Ict.

I did code the VC 50/2 with AKARALABS tool. Leica 50 Apo 50 code works great.

About VC 10/5,6 the LPC does not work well when I chose the Leica 17 WATE code.  Probably the 12 works better.

I have planned to buy the CV15/4,5 : I expects it will works.

 

[lct]

6 minutes ago, Gianfranco Piovano said:

About VC 10/5,6 the LPC does not work well when I chose the Leica 17 WATE code.  Probably the 12 works better.

I have planned to buy the CV15/4,5 : I expects it will works.

Hi Gianfranco, the WATE code is very simple (010000). Applying it should reduce the FoV of your 10/5.6 lens to about 16mm if it works like my CV 12/5.6. Example here. As for the CV 15/4.5 it works well with the same code, my v2 of it at least. Example hereafter with LPC off and LPC on.

[dante]

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To people who use this extensively, does this also correct the aspect (proportions) when it corrects tilt? I am looking at the M11 for this feature for milder situations (camera off level a little), but on a lot of the cruder software PC tools I have seen, you end up with visual "squashing" for lack of a better word.

Thanks!

[PhotoCruiser]

On my SL2 and Lightroom Classic the LPC works surprisingly well and introduce no visible fuzzieness or other artefacts on the corrected parts as similar software did in earlier times. I have to admit that i am really impressed how LPC and denoise work considering older versions.
It does not work always in automatic modes (but often do), sometimes i get better results drawing the straight lines by hand if there is a lot of distortion.
No, i did not found visual squashing, however sometimes the use of Upright function gives better results than automatic mode.
Just play around with it and you will see that it's a awesome tool to fix perspective problems.
Chris

 

[M11 for me]

To me the LPC is a very good tool. It is always active even in case that you have turned it off. It is either directly activated after import in LrC or when turned off in camera then in LrC you can activate it. 

Further we can correct what LPC gives us. The lines (horizontal and vertical) can easily be corrected/adapted or even deleted if you like. Definitely LPC does not alway render the 100% solution but generally I like it a lot. Whenever I am out with my Canon gear I miss that feature. 

[SrMi]

16 hours ago, dante said:

To people who use this extensively, does this also correct the aspect (proportions) when it corrects tilt? I am looking at the M11 for this feature for milder situations (camera off level a little), but on a lot of the cruder software PC tools I have seen, you end up with visual "squashing" for lack of a better word.

Thanks!

I have to correct the proportions only in very rare cases. The LPC setting is tunable in the post unless you are shooting with JPG.

Edited February 24 by SrMi

[marchyman]

8 hours ago, M11 for me said:

or when turned off in camera then in LrC you can activate it.

Yes.  I do like this.  Whenever I feel the need to adjust the image perspective I hit the Guided button in the Transform panel to see what the camera thought was upright.  That is often all I need to do, but as noted I can still fine tune from there.  I don't want automatic application but like that the info is in the image and I can choose to use it or not.

[Gianfranco Piovano]

well, I haven't yet don deep test in critical conditions but, for the test actually done, the PC works well, giving a good results. The biuggest advantage in architecture photo is that you can apply it on every lens.  The typical example is using 15 / 20 mm lenses for interior od cathedrals, but the very interesting is to use it with 50/90 mm lenses for detail that are located higher than my eyes horizont.  The normal resuls is to have a distorted picture but now, with M11 PC, I get a perfect picture like I would have taked with perfectly horizontal cvamera in fron of the detail. Obviously up to an angle that I still have to precisely defined (anyhow less than 45°). as soon as possible I will try to do a specific test: overlapping one picture taken in fron of the subject to a picture taken using the PC. This should be solve any discussion. 

[dante]

I have been testing this with glass finders and wides like 21s. As long as you are reasonably straight in. your composition, it works well. I am not seeing how this transfers directly to Lightroom for the raw files, but it's fine for at least figuring out you are in range.

[Gianfranco Piovano]

I confirm my satisfaction on the PC control. Actually I have following lenses, all added with 6 bit code (mask +paint) and all of them perfectly working with Perspective Control.

1 - Voigtlander 15/4,5 ASPH III

2 - Voigtlander 28/2,8 COLOR SKOPAR II

3 - Leica 21/4 SUPER ELMAR

4 - Voigtlander 50/2 APO LANTHAR

5 - Voigtlander 90/2,8 APO SKOPAR

With a simple selection you can either use the normal view of lenses or the PC correted one: very useful. 

Leica M confirms to a be goot tool to make pictures: essential.

what I would like to have more/fifferent?

Different: the ISO selector. I frequently keep it lifted-up to change from M to A or specific ISO.

More:

1st - IBIS.  As I am becoming old and less firm, I would appreciate an IBIS that would allow me to avoid tripd.  I had to buy a light one that works very well, but to be light is also short ... obviously. To save weight for my shoulder I gained pain in my spine. I have to admit thta Canon R6 was a real dream for this specific feature.

2nd: PC available on 1,3 and 1,8 crop (as Q3)