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Monochrome DNG and Mac


xjr

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No problem on my Mac, which way are you downloading these files...? (I always make a folder with "subject+date" and inside this folder i make two sub folders, called "Raw" and "Processed" then i transfer directly from the card to the "Raw" folder...)

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Monochrom DNG files are not 'normal' DNG's

 

They are Linear DNG ...... normal RAW DNG files contain data from the colour Bayer grid that is then 'de-mosaiced' by the raw processor to yield colour images.

 

Linear is the equivalent of 'un-mosaiced' data ... which is what you get from a non-bayer grid as in the MM (this is a bit of a simplification).

 

Lightroom can decode this as it is an Adobe product and handles all the Adobe DNG variants.

 

Apple, Aperture and most other processors/viewers only handle RAW DNG as this is what you would expect from colour digital cameras.

 

Either take pics as DNG+JPG so you can at least view them, convert to TIFF or wait patiently for Apple & Aperture to catch up. :o

 

Thats why Leica provide you with a copy of Lightroom ... otherwise we would all be hopping mad ;)

Edited by thighslapper
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Monochrom DNG files are not 'normal' DNG's

 

They are Linear DNG ...... normal RAW DNG files contain data from the colour Bayer grid that is then 'de-mosaiced' by the raw processor to yield colour images.

 

Linear is the equivalent of 'un-mosaiced' data ... which is what you get from a non-bayer grid as in the MM (this is a bit of a simplification).

 

Lightroom can decode this as it is an Adobe product and handles all the Adobe DNG variants.

 

Apple, Aperture and most other processors/viewers only handle RAW DNG as this is what you would expect from colour digital cameras.

 

Either take pics as DNG+JPG so you can at least view them, convert to TIFF or wait patiently for Apple & Aperture to catch up. :o

 

Thats why Leica provide you with a copy of Lightroom ... otherwise we would all be hopping mad ;)

THANKS !!! I must admit this has "forced" me into lightroom and I can now see the advantages of this software but I have a long way to go with it....yet.

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thank you for mentioning 'linear DNG'. i am able to import the DNG files to a mac, using CS5 with ACR 6.7, but notice that HDR, Color Efex and Silver Efex are greyed out in the filter menu. is this possibly related to the special nature of the Monochrom files?

 

the Adobe site shows only CS6 and ACR 7.1 as compatible with the Monochrom, so i'll probably have to upgrade for full compatibility.

 

thanks

 

rick

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I routinely send my SD files from my M9 and MM to my backup devices (4 different ones) as soon as back home from shooting.

 

If I double click any image in any backup device while on my Mac it opens in CS6. Yes, in Command + Info I have set up all DNG files open with CS6. It works.

 

You can have all files with any extension, i.e., DNG, JPG, TIF etc open in any software program you desire from my experience by doing this (Cmd+Info) on your Mac.

 

However, after rereading your post, I realize you are probably opening your DNG files in Apple's default image processor, Preview. That could be the beginning of your problems.

Edited by algrove
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Monochrom DNG files are not 'normal' DNGS. They are Linear DNG ...

No, they're not.

 

 

Linear is the equivalent of 'un-mosaiced' data ... which is what you get from a non-Bayer grid as in the M Monochrom (this is a bit of a simplification).

An over-simplification indeed. The DNG files from the M Monochrom are slightly different from colour DNG files, but they are not linear.

 

 

Lightroom can decode this as it is an Adobe product and handles all the Adobe DNG variants. Apple, Aperture and most other processors/viewers only handle [regular] DNG as this is what you would expect from colour digital cameras.

Yeah ... I keep wondering why no digital-imaging-software provider (except Adobe) cares to read and to implement the full DNG specification. It's public, it's free, anyone can download it, read it, and write software to deal with it. Adobe even provides a free SDK to support DNG software development.

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THANKS !!! I must admit this has "forced" me into lightroom and I can now see the advantages of this software but I have a long way to go with it....yet.

 

Don't get too excited - I was 'forced' into another evaluation of Lightroom for 6 months with the Monochrom. To start with I assumed that I'd get to like it and convert. . . . . .

 

When the Monochrom went back it was such a relief to get back to Aperture again!

 

Others have done the explanation of 'why'. As I understand it there needs to be change to core support within Mountain Lion, and that it will be implemented 'shortly'.

 

There should be no such problem with the M dng files, as they are demosiaced normally.

 

One thing I did find though, is that the jpg files from the Monochrom are really very good (as you would expect them to be after a moment's thought).

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An over-simplification indeed. The DNG files from the M Monochrom are slightly different from colour DNG files, but they are not linear.

.

 

Indeed - but they are not de-mosaiced in the same way as files with a Bayer filter. . . . and as I understand it Adobe had to make adjustments to the DNG standard to accomodate them.

 

The Fuji X-pro1 have a parallel problem with demosaicing as they also don't use a Bayer pattern. . . . . hence poor support from Adobe and none (yet) from Apple.

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Just for reference, M Monochrom DNG files are technically "LinearRaw" - aka, the PhotometricInterpretation tag is set to 34892. This is required, as the only other choice is CFA (Color Filter Array), which the file is clearly not.

 

Whether or not that qualifies as "normal" or not I'll leave to others :D

 

Sandy

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Indeed - but they are not de-mosaiced in the same way as files with a Bayer filter. . . . and as I understand it Adobe had to make adjustments to the DNG standard to accomodate them.

Both Lightroom and ACR could read the DNGs from the M Monochrom even before its May 10 announcement.

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An over-simplification indeed. The DNG files from the M Monochrom are slightly different from colour DNG files, but they are not linear.

 

What's this field from the Monochrom's DNG mean?

PhotometricInterpretation: 34892 (LinearRaw)

Edited by pico
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Indeed - but they are not de-mosaiced in the same way as files with a Bayer filter. . . . and as I understand it Adobe had to make adjustments to the DNG standard to accomodate them.

 

That shocks me. I wonder if it is really true. The DNG spec seems to cover the non-mosaiced image quite well. It seems more likely that non-Adobe products simply have difficulty because they did not properly anticipate it.

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What's this field from the Monochrom's DNG mean?

PhotometricInterpretation: LinearRaw

 

A few things - firstly, that the data is not mosaiced, and secondly that the data is output referred. In this case, that exposes a bit of an oversight in the DNG spec - actually, the data is not mosaiced but is scene referred. But the DNG spec only has a single tag.

 

But really, don't worry about it - data at this level is only of interest to the raw converter.

 

Sandy

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Sandy, thank you so much for the clarification. So there was, as Jono suggested, an oversight. I'm good with that now. (And thanks to Jono for mentioning it.)

 

I found your site and also read that the Monochrom's DNG has a different 'tone mapping' than the M9. Would this explain why some people think the Monochrom produces 'flat' images/output? (perhaps I should put this question into the proper thread.)

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I found your site and also read that the Monochrom's DNG has a different 'tone mapping' than the M9. Would this explain why some people think the Monochrom produces 'flat' images/output? (perhaps I should put this question into the proper thread.)

 

Well, I haven't actually done the test (I'd really need an image of a GM24 test chart to do so, and I don't own a M Monochrom), but I'd assume that Adobe have overridden the Monochrom's rendering to have a tone curve even though its tagged as output referred. If they haven't, then yes, that could be an issue.

 

Sandy

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I recently replaced my old & tired Macbook Pro with a new 13" Retina Display which runs on Mountian Lion OSX 10.8.2.

 

This what I now see when I double click & open the SD card on the desktop:

 

Welcome, dear visitor! As registered member you'd see an image here…

Simply register for free here – We are always happy to welcome new members!

 

On the previous version I was able to see the thumbnails on the desktop. Once I open in either PSE or LR4 the thumbnails are visible.

 

Good to have the technical explanations for this. However is there a way around this or must I shoot DNG & Jpeg in order be able to see the thumbnails when opening the SD card on the desktop?

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