M10 wifi to iPhone or IPhone - image sizes too small. Anyone know of a fix?

[doug_m]

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I am using the Leica M10 app for iPhone and iPad on those devices. I can send images to my iPhone or iPad. However, the images are tiny and very low resolution. I've tried sending them both as RAW files and JPEGs. The iPhone and iPad will receive both RAW and JPEG files but they remain very small.

 

Although I understand that a full-size image file would be too large to send via Wi-Fi to these devices, it seems like the M10 plus this app should to be able to transmit an image which is about the same size as

"large or full size file" iPhone images.

 

The M10 has been absolutely great otherwise.

 

Does anybody know of a fix for this problem? Please assume my IT etc skills are poor in your reply.

Thanks

Edited February 23, 2017 by doug_m

[digitalfx]

Go into menu on iPhone app and select "Camera Roll Resolution", then tell it what you want.

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[Tobers]

Yes. When the app is open and connected to the camera, in the app click on Menu > Camera Roll Resolution and it will be set to 1.3MP. Change it to whatever you want (I use 24MP).

 

Sorted.

[doug_m]

Thanks for the replies. I will try it. Much appreciated!

[doug_m]

One more question:

 

What is the significance of (in the app menu) turning DNG to Camera Roll on vs. off? Seems like RAW files require it to be turned on for decent size images to be sent to an iPhone or iPad but I'm not sure.

 

Anyone know about this?

 

Thanks

[sandymc]

The way that images are stored in the iOS camera roll is a bit unusual. In most desktop environment, e.g., Windows or macOS, you deal with single files - e.g., fred.jpeg. Under iOS however, what is stored on the camera roll is not necessarily a single image, but a set of images (in iOS speak, "representations"). Typically for a DNG file, one representation would be the original DNG file. But in addition to that, there would be at least one non-raw representation - usually a jpeg - so that any app could display the image. If you just import a DNG into Camera Roll, usually iOS grabs the smallest preview from the DNG, and assigns that as the non-raw representation. 

 

I would think that what the Leica app is doing is, at the same time that it stores the DNG to camera roll, it also allows you create a non-raw representation of whatever size you want. This is why M10 DNGs have a full size embedded preview image - see this thread.

[otto.f]

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The way that images are stored in the iOS camera roll is a bit unusual. In most desktop environment, e.g., Windows or macOS, you deal with single files - e.g., fred.jpeg. Under iOS however, what is stored on the camera roll is not necessarily a single image, but a set of images (in iOS speak, "representations"). Typically for a DNG file, one representation would be the original DNG file. But in addition to that, there would be at least one non-raw representation - usually a jpeg - so that any app could display the image. If you just import a DNG into Camera Roll, usually iOS grabs the smallest preview from the DNG, and assigns that as the non-raw representation. 

 

I would think that what the Leica app is doing is, at the same time that it stores the DNG to camera roll, it also allows you create a non-raw representation of whatever size you want. This is why M10 DNGs have a full size embedded preview image - see this thread.

 

I read your article on: http://chromasoft.blogspot.nl/2017/01/leica-m10-raw-file-dng-analysis.html

So if I may summarize: most iPads or -Phones are not able to handle DNG properly, so wouldn't it be pragmatic to set FileFormat on DNG+JPG if you want Camera Roll to be able to present it in a reasonable way?

And do you know sandymc how this works now under firmware 1.3.4.0 ?

Edited February 24, 2017 by otto.f

[sandymc]

I read your article on: http://chromasoft.blogspot.nl/2017/01/leica-m10-raw-file-dng-analysis.html

So if I may summarize: most iPads or -Phones are not able to handle DNG properly, so wouldn't it be pragmatic to set FileFormat on DNG+JPG if you want Camera Roll to be able to present it in a reasonable way?

And do you know sandymc how this works now under firmware 1.3.4.0 ?

 

 

M10 DNG's already have a full sized image embedded in them, although a low quality one. So it's not really necessary to shoot JPG+DNG, if you set up the M10 app as discussed above. But equally, there's nothing wrong with it, and you can get a better quality jpeg.

 

So far as I am aware, the new firmware doesn't change anything in this regard.

[doug_m]

Hi Sandymc,

 

Thanks for the reply. However I am not still clear about this. Currently I am a shooting DNG only on the M10. I am not shooting DNG plus JPEG. The question in the iPhone/ iPad app menu is whether to have DNG to Camera Roll on or off?

 

So my question is what are the consequences of each option- having this feature on versus off-because I have not figured that out yet.

 

Again, please assume my IT type skills are poor. I think I understood what you previously posted but it didn't seem to answer the question - or at least I could not understand your answer.

 

Any assistance with this is appreciated.

[sandymc]

Hi Sandymc,

 

Thanks for the reply. However I am not still clear about this. Currently I am a shooting DNG only on the M10. I am not shooting DNG plus JPEG. The question in the iPhone/ iPad app menu is whether to have DNG to Camera Roll on or off?

 

So my question is what are the consequences of each option- having this feature on versus off-because I have not figured that out yet.

 

Again, please assume my IT type skills are poor. I think I understood what you previously posted but it didn't seem to answer the question - or at least I could not understand your answer.

 

Any assistance with this is appreciated.

 

 

I think that the consequence  of having the option on will be the Leica app will add a larger image non-raw representation to the files that are imported into the camera roll. The advantage of that will be that apps that can't process raw files will be able to process and display a full sized image, although not a high quality one. Most iOS image processing apps can't process raw data; apps such as PhotoRaw that can are an exception. The disadvantage is storage size, and the relatively low quality image.

[ramarren]

Photos and other apps on iOS can process raw files if they are using iOS v10.2 or later. The exceptions are apps like PhotoRAW which were specifically designed to process raw files even prior to Apple including the raw processing engine in the operating system. 

 

I can't comment on the other capabilities of the Leica M10 app because I don't have an M10 to use with it and see how it differs from the Leica SL app. The Leica SL app at the present time only transfers JPEG files to the phone or pad.

 

However, the Lightning to SD Card Adapter transfers DNG files or JPEG+DNG pairs to iPad or iPhone 6. They're stored in the Photos file system side by side. With DNG only enabled on the camera, Photos reads the preview in the DNG file for a low resolution rendering. PhotoRAW reads the DNG and can output a JPEG or TIFF at full resolution; other apps can do so as well now, with iOS 10.2.