M9 in camera lens settings

[mmayer]

Advertisement (gone after registration)

Hi there,

 

right now when I change lenses, since they're not coded I always go to the menu and change the lense-type there manually.

 

But I wonder if that has any function at all if I shoot in DNG (compressed) only and in Lightroom use the Adobe Lense-Correction profiles? I mean besides having less EXIF data...?

 

I know that in other cameras such settings only have an influence on JPGs for example and the correction happens "inside the camera" so to speak.

 

Because if it doesn't, I could just turn it off and same some time

 

Thank you

 

Marco

[Advertisement]

The Leica Q3 is available for pre-order at B&H Photo Video and Adorama

[Luke_Miller]

I believe the body applies some color and vignetting corrections depending on the lens that is mounted. These corrections are applied to both DNG and jpeg files and are particularly important with wide angle lenses. If you use the Lightroom lens correction profiles and do not have the correct lens reported in the EXIF data I think you would have to correct the lens used for each image. Seems easier to do it when you mount the lens.

[jip]

What Luke says is the case, although it doesn't do distortion, like barrel or pincushion. That you have to do in Lightroom, the camera does some vignetting, and like he said especially useful for wide angle lenses.

 

 

But it's only generic since the camera doesn't know aperture used it only corrects a little.

[sdk]

The profiles in the M9 allow the camera to write which lens was used into metadata, which can then be used by Lightroom or Photoshop for easy lens distortion correction. As Luke and Jip said, the in camera profiles also do some vignetting and corner color correction, which is important for lenses wider than standard <50mm focal length.

 

However, on my M9P I am not satisfied with the corner color cast correction on my 24mm and 28mm lenses, or on the Zeiss ZM 21mm and 25mm wideangles using Leica profiles. On many subjects like snow scenes or concrete, the built in corrections can leave some corners slightly cyan and others slightly red (a phenomenon nicknamed Italian flagging). Fortunately software can fix this. I find the Adobe DNG Flat Field correction plugin works well for this if the problem is obvious (with many subjects it’s hidden by stronger colors). For critical color you have to shoot reference flat field images of a white wall or through white diffuser plastic for the plugin to work, then apply the correction in Lightroom 4 or 5. See Plug-ins for Adobe Photoshop Lightroom | Adobe Labs

[flyalf]

Image correction are made to both DNG and jpeg as stated by Luke. Additional correction can be made by using Lightroom lens profiles, such as rectifying lens distortion. This can be chosen in LR for DNG independent of lens profiles / EXIF data. The LR correction is not the same as applied by M9 or M FW.

 

Btw; I wish I could have the Leica FW lens correction as standalone PC SW such as a LR plugin. Dont think its gonna happen .

[mmayer]

Okay that's some good information, thank you all.

 

So it actually does make sense to set the lense in the menu each time - makes me think to code my lenses.

 

But I guess for a 50mm 1.4, a 75mm 2.5 and a 90mm 2.8 it doesn't make much of a difference anyway...am I right?

[sdk]

Advertisement (gone after registration)

No, long lenses don’t show as much vignetting and no color casts. It’s optional to profile code those.

[Staka1977]

Hi to all. I do not understand how the lens code works. With the 6 bit code mounted on the lens do the camera automatically detect the lens and correct vignetting and color shift problem? But is this anyway possibile to manually select the lens on the camera menù and let the camera do this correction,right? Is not necessary to mount the bitcode to have the correction, right?

 

 

Inviato da mio iPhone utilizzando Tapatalk

[sdk]

Staka1977, that’s right for most lenses made since the 1980s there are lens codes you can select manually in the menu, with the exception of lenses that have only been made in 6 bit coded versions. The advantage of coded mounts is you can’t forget and leave the wrong code selected when changing lenses.

[mmayer]

One more question to this. Let's say I set the lense in camera...if I also use the lense correction profile in lightroom will that be too much then? In other words do I have double-lense-correction in that case?

[jaapv]

A lens correction profile in LR is a bit overdone for most Leica lenses, it is really only useful for complicated distortion problems (and most Leica lenses are not listed anyway)