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

[Aquillum]

Hi !

First try with dual iso today.

Canon 550D, today's ML build, dual_iso-Module enabled.
Internal ISO:100
Dual ISO 100/800 or 100/1600 enabled

Dropping the CR2 files on the EXE (Windows, 20.09.13) it says:

Code: [Select]

D:\Software\Canon\cr22hd>cr2hdr.exe IMG_3535.CR2

Input file     : IMG_3535.CR2
Canon EOS 550D detected
Full size      : 5344 x 3516
Active area    : 5202 x 3465
Doesn't look like interlaced ISO
I don't see any interlaced lines at 100% for reference.
Any ideas why no dual ISO files are created ?

Thanks ! Harry

[RenatoPhoto]

Canon 550D, today's ML build, dual_iso-Module enabled.
Internal ISO:100
Dual ISO 100/800 or 100/1600 enabled

Input file     : IMG_3535.CR2
Canon EOS 550D detected
Full size      : 5344 x 3516
Active area    : 5202 x 3465
Doesn't look like interlaced ISO

Maybe the nightly build does not yet support the DUAL ISO feature for this camera.

I think it has been enabled by another developer, check this thread:

550D raw video recording port official thread
http://www.magiclantern.fm/forum/index.php?topic=5582.0

[RenatoPhoto]

canon 60 not supported

Look in this thread:
60D RAW video - it's working !!!
http://www.magiclantern.fm/forum/index.php?topic=5653.0

[a1ex]

Maybe the nightly build does not yet support the DUAL ISO feature for this camera.

In this case, he wouldn't be able to see dual ISO in the menu.

[RenatoPhoto]

In this case, he wouldn't be able to see dual ISO in the menu.

@ Aquillum
In that case then you need to learn how to use it:

(Auto) ETTR (Exposure to the Right): -- History & Beginners Guide
http://www.magiclantern.fm/forum/index.php?topic=5693.0

AETTR + DUAL ISO: The Ultimate Automated Perfect Image Exposure-Beginners'Guide
http://www.magiclantern.fm/forum/index.php?topic=8322.0

[Aquillum]

I used ETTR since May, even with a timelapse, thats not the problem.

The problem is with the latestbuild:
I am able to enable the modules, they are loaded after restart and I see ETTR and Dual Iso in Menu.

I enable Dual-Iso, set to 100/800, take the raw but the CR2 is NOT Dual Iso.

I also tried the ML_550D_Dual_ISO_Aug_25_2013_Update.zip build posted in that forum after cleaning ML folder completely (not to mix modules) but it also doesn't work.
Does anyone with a 550D shot a DualIso successfully ? I can't.

[RenatoPhoto]

Did you know that you have to reboot the camera for the modules to work?  It is a new thing!!

[N/A]

A.D. has working in CR2HDR and now support DNG!

https://bitbucket.org/a_d_/magic-lantern/downloads/OSX_cr2hdr_app.zip

What about the actual dual iso raw files? That would be epic.

[Aquillum]

As I wrote before I restarted, the modules loaded OK.
I use the standard settings in Dual Iso Menu (100/800).
I take the pic in Av or M, with or without LV, but the resulting CR2 doesnt have scanlines and cr22hdr also doesn't recognize it as an DualIso file.

[a1ex]

Just tried it on 550D, works fine.

Any warnings in menu?

[Aquillum]

No warnings.
As it works for you its definitly on my side - thanks for trying !

[a1ex]

Can you post a video of the camera screen, while you are trying to use it?

It should show the dual ISO menu, Canon settings (main photo screen, with ISO, shutter and so on), then take a picture, go to playback mode and zoom to 100%. Maybe this gives some hints about what's going on.

[Aquillum]

Now it works.
Things done (from my memory): (DualIso was enabled)
- switched Canon Iso from 100 to 200
- switched to DUAL Prefix
- enabled ETTR - Switched from AutoSnap to SET
- switched LV - shot ETTR and realized the Image Scanlines in PLAY
- switched ETTR OFF
- DUAL ISO shot still works
- CR2 decoded fine

THX for your support (even if its just "Here it works", that was enough  for me)

[swinxx]

@a.d.
nice now the conversion of dual iso dng files work.

i have one question a.d.:

when i see my magicraw converted dng files (from a raw file) in the folder, i can preview that file with the space bar.. (mac preview)
after the conversion of the dual iso dng with your tool (i can see that it renames to CR2 and then again to dng) there is no preview in the finder anymore..?
is this because of the conversion? why do i lose the preview?


thx and keep on developing great tools. sw

[a.d.]

I need to rename, 'cause after cr2hdr save_dng run it called copy_tags_from_source, to copy EXIF from original to converted file. That means I need to save the original file to get the EXIF Data. Alternatively I could inject the Camera Model through chdk-dng, however it hardcoded. (only one Camera Model)
You are right, the preview is lost through conversion.

[lucabutera]

I got dng files from raw video but I can not use cr2hdr!
please, help me!

[Audionut]

I got dng files from raw video but I can not use cr2hdr!
please, help me!

Help us to help you by extending your bug report to include useful information.

[Marsu42]

Bug: cr2hdr on 6d adds 2 black borders to shots, here's a random dng with this problem (no, this shot won't win any prizes :-p): https://bitbucket.org/Marsu42/ml-mod6d/downloads/DUAL2689.CR2

Btw see also these feature requests:
http://www.magiclantern.fm/forum/index.php?topic=8579.0
http://www.magiclantern.fm/forum/index.php?topic=8580.0

[artiswar]

Any idea why my DNGs out of cr2hdr look like this for some shots?

[1%]

Bug: cr2hdr on 6d adds 2 black borders to shots, here's a random dng with this problem (no, this shot won't win any prizes :-p): https://bitbucket.org/Marsu42/ml-mod6d/downloads/DUAL2689.CR2

Upgrade your dcraw. No bars here.

But I do get some conversion artifacts on this shot:

[a1ex]

Have a link to an updated dcraw that works on Windows?

[Marsu42]

Have a link to an updated dcraw that works on Windows?

Here ye go, fresh compile just now: https://bitbucket.org/Marsu42/ml-mod6d/downloads/dcraw_9_19-m42.zip

Don't be too shy to install the mingw packages on your linux though, then just compile with "i686-pc-cygwin-gcc.exe -o dcraw -O4 dcraw.c -lm -DNODEPS" and get an .exe file.

[a1ex]

Thanks, will update the zip in the first page when I'll be able to access the ftp (it seems broken now).

[Marsu42]

Upgrade your dcraw. No bars here.

Yes, that did it - thanks! I forgot that cr2hdr is not the only component to keep up to date.

Btw, this again reminds me of how important it is too keep the old cr2 around (I recently suggested an option to embed them in the dng for safekeeping & easy updating with a newer cr2hdr). Is cr2hdr considered "production-ready" now, or are there outstanding important bugfixes or enhancements?

[artiswar]

Any idea on the previous shot I posted? The log states something about bad black delta. Only on a few takes from a short this weekend that utilized a higher ISO spread.