Dual ISO - massive dynamic range improvement (dual_iso.mo)

[nanomad]

Dual iso works with "analog" ISO only. 12800 is definitely digital

[Asufeld_ins]

Hi everyone and thx for this feature.

I use ML from many month and i take recently a new feature for Dual ISo.

But i have a problem.

When i can put my CR2 on cr2hdr.exe

Many of them don't work , the windows open just 1 second and shutdown.

Why a lot of my Cr2 work but not everything of this ?

( sorry for my english .... )

[Canon eos m]

Hi everyone and thx for this feature.

I use ML from many month and i take recently a new feature for Dual ISo.

But i have a problem.

When i can put my CR2 on cr2hdr.exe

Many of them don't work , the windows open just 1 second and shutdown.

Why a lot of my Cr2 work but not everything of this ?

( sorry for my english .... )

Please look for post #633, #644 and #645 for help.

Best is to save the file in the root director. Name the directory cr2hdr. Download the zip in the directory and unzip. Save the cr2 files from the camera in the cr2hdr unzip directory where the cr2hdr.exe files have been extracted. It should work without a problem. 

[Asufeld_ins]

Thx for answers

I read it before you post for my.

I have extract on c:/ch2hdr

and i taking ch2hdr_exp.exe too.

I clear my TMP file

And is the same problem.

My DSLR is a 50D. Have a feature ( ch2hdr ) Just for it or is the same for all ?

[Canon eos m]

Thx for answers

I read it before you post for my.

I have extract on c:/ch2hdr

and i taking ch2hdr_exp.exe too.

I clear my TMP file

And is the same problem.

My DSLR is a 50D. Have a feature ( ch2hdr ) Just for it or is the same for all ?

Same for all.

[fanous]

Hi Guys,
New firmware is great, but...
After I install it (booting from CF card) my 7D eat energy very fast. Batteries (two in battery pack) are on half of capacity after taking around 150 photos
I have ML firmware on one CF card and I using it when I need Dual ISO. If the "Dual ISO" card is in my 7D the back red LED is blinking once a 2 second period. If I need normal shooting I place into my 7D another card (no red LED blinking). In both cases the consumption of energy is very fast. One more think, when I turn camera on there is about 2 second delays then camera is ready to work...
For me energy and readiness is priority number one. Can I remove booting from my 7D? Can you help me, please?
Thank you for your response

PS Sorry for my bad English

Fanous

[Walter Schulz]

If the "Dual ISO" card is in my 7D the back red LED is blinking once a 2 second period.

Described in the 7D installation procedure thread: Prefs -> Warning for bad setting -> Q -> Turn all 3 warning items OFF

Can I remove booting from my 7D? Can you help me, please?

- Download http://pel.hu/ML/bootoff.bsdiff
Follow the steps creating 7Dbooton.fir but create 7Dnoboot.fir
See http://www.magiclantern.fm/forum/index.php?topic=3974.msg64342#msg64342 for detailed instructions.

Ciao
Walter

[fanous]

Thank you Walter

[Luzestudio]

600D, its not perfect. I saw some artifacts.

http://www.filedropper.com/600ddualiso

Thanks a lot 1%, trying right now, the results looks incredible! Thanks for keep integrating the updates into the 600D.

[akumiszcza]

Attended a wedding and tested the duel iso for my 50D. Some beautiful dynamic range.



When nighttime hit, I tried to see if I could do something like 800/12800 but even though it was selected, it still defaulted back to 800/1600. Maybe a bug? (I know it would be incredi-noise, but I just wanted to see how bad it would be).

Hi. What ISOs and converters did you use for this shot? I've just checked with latest tragic lanter build and latest cr2hdr (for windows) from first post here and still get greenish shadows.

[oddname]

I agree about greenish tint, using latest cr2hdr with my 5D2 many images are greenish and no color correction can get rid of it, any attempt
just adds some other color on the greens.

[sdesign]

getting very frustrated, shooting pictures with my 50d, newest tragic lantern, aug17th, keep getting nogo saying something about interlaced something rather.  Simple files names and all, still weird nogo's, HELP!!!!

[Andy600]

getting very frustrated, shooting pictures with my 50d, newest tragic lantern, aug17th, keep getting nogo saying something about interlaced something rather.  Simple files names and all, still weird nogo's, HELP!!!!

Are you using the latest cr2hdr.exe? http://www.magiclantern.fm/forum/index.php?topic=5586.msg67977#msg67977

Are you sure you actually have Dual ISO enabled?

[D.L. Watson]

Hi. What ISOs and converters did you use for this shot? I've just checked with latest tragic lanter build and latest cr2hdr (for windows) from first post here and still get greenish shadows.

I used ISO 100 and 1600 with the latest cr2hdr for Windows. They converted beautifully for me.

[D.L. Watson]

Dual iso works with "analog" ISO only. 12800 is definitely digital

Then why is it even an option in the Duel ISO settings?

[akumiszcza]

I used ISO 100 and 1600 with the latest cr2hdr for Windows. They converted beautifully for me.

I've checked again with latest build and latest cr2hdr compiled by Andy600. It looks like "extreme" cases (with blown highlights) are still converted wrong by it (green), but otherwise it's a huge improvement (most photos are nice).

Example of wrong processing:
https://mega.co.nz/#!lMUQ1Syb!bUPbAzlUBwnqWgjGER5eyGBbZ3JptHNwzZKRlXJsgkE (CR2)
https://mega.co.nz/#!IFtzGYqB!fEk-PEU91rsOyq6bGxSwYA9_IOJUFLRaTpbMKgl7lnY (DNG)

[1%]

Different cameras have different isos... 128K I don't think anything has native, maybe 5d3 or 1dc/x.

[D.L. Watson]

Different cameras have different isos... 128K I don't think anything has native, maybe 5d3 or 1dc/x.

That makes sense. Thanks for the clarification.

[sdesign]

Yes i'm actually using it and its giving me a quick error that i cannot read fast enough and closes

[engardeknave]

For those of you with a window just flashing when you drag-drop onto the .exe, try putting the files you want to convert right in the same folder, right off the root of your drive, ie. c:\tmp. There was a problem with the path when I tried dragging directly from the CF card at first. (Failing that, maybe try running cmd.exe and run the program so you can see the error.)

Does anyone know the best way to expose with dual ISO in the daytime? Specifically I mean: under or over? The photo seems way brighter after taking the shot than in LV. Am I going to get better highlight or shadow recovery? I'm going to do a shoot tomorrow and I won't have time to read/experiment and figure this out beforehand.

[akumiszcza]

Does anyone know the best way to expose with dual ISO in the daytime? Specifically I mean: under or over? The photo seems way brighter after taking the shot than in LV. Am I going to get better highlight or shadow recovery? I'm going to do a shoot tomorrow and I won't have time to read/experiment and figure this out beforehand.

Select ISO 100 and set ISO 100/1600 in Dual ISO settings. Expose to get highlights properly (not cut). Best would be exposing to the right. 1600 ISO will take care of shadows.
Most often setting EV-2 in Av while taking a shot works fine.

I did not check 1600/100 method though, but I think proper exposure will be trickier (you won't be sure if highlights are ok). Also 200/800 might get much less noise if the dynamic range is not too great.

[Doyle4]

As the Highlights and Shadows are half resolution,

could there be an option in the cr2hdr app to make the other iso image half resolution to match the resolution of the shadow and highlights? people may wonder why i would like this but i noticed Dual Iso only works on RAW setting no sRAW1 or sRAW2, resize is an option in photoshop or other editing software but i would be halving the resolution again in the highlights and shadows.

cr2hdr could produce two images with this option enabled, one is the final image that the program does now and a 2nd image has been scaled to match the resolution of the halved highlights and shadows.

Cheers

[Walter Schulz]

The question is: Is it broken?

I'm not so sure about this feature (if it blocks ML developers "resources"). I learned mid tones have big influence on sharpness reception (and more). Look what LR/ACR ruler Clarity does and this is done (AFAIK) mostly by midtone manipulation. Therefore I don't have a big problem with lacking resolution in shadows/highlights.

At the moment this all is theoretical and has to be verified/falsified in the field with some valid examples.

Maybe it is just the other way round and diminished highlight/shadow resolution will stick out like a sore thumb when viewed by Mr. and Mrs. Common.

Ciao, Walter

[sdesign]

im really sorry to bother againg, but the root trick amongst every other trick, doesnt work.  I've changed filenames to be simpler, downloaded the latest and greatest cr2hdr and all it does is still flash and complain about some not interlaced or something like that, i cant read it so fast, as it comes up.

[Walter Schulz]

Old admin trick: Make a video at highest possible frame rate! ;-)

Ciao, Walter