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@dmilligan,

Take two photos with the same shutter speed and aperture, one at ISO 100 and one at ISO 1600. In post, bump the exposure of the ISO 100 shot by ~4 EV to match the ISO 1600 shot. Now, compare the two.

Now, with the same shutter speed and aperture (and the same scene), take a dual ISO shot at 100/1600. Process it with cr2hdr and increase the exposure to match the first two. Compare with the first two.

Sounds interesting, I'll try, although I don't have tools which can do "exactly +4 EV", I'll have to do it by looking at the pictures, when they're "equally bright". Thank you, I'm always willing to learn!

UWP

I get different results from you, though (on the 7D). For me, lower ISO results in larger noise grain and more obvious vertical banding. Can you describe what "less quality" means to you?

I'll try to bring some test pics to show. I guess it will be weekend until then. Right now I don't have time for shooting pics.
But I'll try to show!

[less]

Higher ISOs have less noise (per photoelectron) not more (otherwise it would be pointless to use them). Therefore, using a higher recovery ISO with dual ISO will result in less noise in the final image, not more. This is the whole entire reason dual ISO exists and is useful.

http://www.magiclantern.fm/forum/index.php?topic=10111.0
http://clarkvision.com/articles/iso/index.html
http://theory.uchicago.edu/~ejm/pix/20d/tests/noise/index.html

All of this might be right, but the results speak their own language. Higher ISO = less quality, especially regarding noise patterns. That's what I can see on all my pics. Even in dual ISO I can see the effect although of course a ISO 100/1600 pic is way better than just a ISO 1600 pic, even with the 650d.

"Much better"? May I ask why?

Dual ISO is about 2 shifting ISO lines. One is normally with ISO 100 and the second one should be higher. The 650d has first noise at ISO 200 and a bit more at ISO 400. ISO 800 is really visible noise at the pics. To get much exposure gain you should always have a big difference between both "poles", but ISO100/1600 was too much for a good quality dual ISO pic with the 650d so I had to go down to 100/800 but even here I got noise in the result. When I'm doing 100/800 with the 70d there's almost no noise, the pics are very clear. I first have this good result with a 650d with 100/400 while the result with 100/1600 is also quite ok with the 70d. And when I compare the normal pics: 70d has almost no noise upto ISO 800, with ISO 1600 I can see the first disturbing pixels, the 650d is way worse regarding ISO quality. BTW, with the 650d I always had to do bracketing HDRs with ISO100. ISO 200 lead to too much noise in the resulting pic. With the 70d it's possible to do bracketing HDRs with ISO 400 (the bridge has been made with ISO 400) with almost no noise. 70d is just a better camera or has got a better sensor/technical stuff/processor inside, whatsoever. The results are obvious for me.

UWP

Hi UWP,

Wow! I just luv your HDR bracketing pic!
Man, I can't wait to make sum myself... 

Thank you!

I can also recommend dual ISO, although the output is not as impressive, but it's fair enough:

https://www.facebook.com/photo.php?fbid=783824978337238&l=66dc5b613d

(This one has been made with a 650d, the quality with a 70d should be much better)

The work-side is just a bit more but here you can do HDR in one-shot, that's especially by day very helpful!

Have a nice time in South Africa, lots of good pictures for you!

UWP

Better use the latest build from 1st post.
If you manage to get the ERR30 afterwards again plz post a detailed instruction on how to reproduce it.

Ok, I'll try the next days!

UWP

I've been travelling the last weeks and used ML a lot. Right now I have the version from March 6, I'm mostly using dual ISO and Advanced Bracketing. Dual ISO is very stable, big congrats on that! But with advanced bracketing I got some Err 30 when doing this:

Starting to shoot a series. Sometimes the longest pic had been too long (I'm sometimes a bit impatient) and I thought maybe I don't need the long exposure pic, so I just switched the camera off. Immediatley I'm getting Err 30 with the hint to take off the battery and reinsert it. Of course nnothing else happened, after this everything is going on fine, just had to reenable all modules.

I could see kind of log on the SD card afterwards, would it be useful to extract and post it here? Or doesn't it help at all? And I  always get the same error while switching off during advanced bracket shoot. I don't know if it's good or bad to test it that way, but at first it happened and to be sure that it will always happen while switching off I tried it 3 or 4 times and yes: always the same, Err 30.

For me it's a marvellous firmware, I can do lots of nice things with it! Here's an example of one of my bracketing shots:

https://www.facebook.com/photo.php?fbid=812094518843617&l=2f35cd3554

Thank you for this wonderful peace of software!

UWP

I'm normally not into standard images, I always try to do HDRs between real & comic view. But to show that 70d (YEAH, fresh ML!) is also capable now of ML & dual ISO here's one of my first tries. One is drago (luminance-hdr) developing only, showing a slightly real result, the other one is a mix of several HDR developments of luminance-hdr to have that "comic feeling". For bracketing images, it's mostly a harder effect, in dual ISO I cannot do full comic without having too much noise at the pics.

Those are ISO 100/1600and I found them in result slightly unsharp, I had to resize them to have'em sharp enough. It seems you lose a bit sharpness during the process or the image itself had been unsharp, I really don't know exactly.

Natural (drago):



Comic (mix):



UWP

Okok, I got the message, I'll wait...

I'm only in a hurry because in 2 weeks I wanted to use bracketing & dual ISO during my holidays. But of course: take your time! I surely know that good software needs time! I can only repeat myself: thank you for this wonderful piece of software!

@UWP: read 1st post.

some features need "properties enabled" to work like advanced bracketing, MLV recording, dual iso, dot tune etc...
None of the public alpha builds has them enabled. So some features either don't work or are auto-hidden and you won't be able to see them in ML menu.

I read it. And there's absolutely no way to "unhide" them, not even for testing purposes?
Ok, what you wanna say is: it can brick the cam? I'm willing to test it anyway...

Thanx!

Yes, exactly. I did some first tests indoors and posted 'em to the appropriate topic:
http://magiclantern.fm/forum/index.php?topic=7402.msg140471#msg140471

Quite impressive! Is it in your "unmaintained" version? And: only the dual ISO or bracketing too?

Thanx!

UWP

Hi there!

I had a 650D for some years now, but the image-counter crossed the 200k line so I was thinking about a new cam. Before my decision I read about 70D development was starting so I bought a 70D. And yes: it works! Great job, it was even easier than the start procedure on the 650D! I know it's an alpha release. But maybe there's time for wishes? What I mostly do is bracketing & dual ISO. I couldn't find both of'em in the February Alpha 3 release, so I guess, it's in the pipe on a later date? If it gets faster, I'm willing to test it for bug fixing! Of course the other stuff is nice too, but I normally shoot HDR pics, MagicLantern's got specific stuff for all of us. Or are the bracketing menus hidden somewhere? And the dual ISO image stuff? At least I couldn't find it...

Anyway: great work, I haven't seen any problems yet while playing around with it! Strange: the module for integrated picture view in the filemanager cannot handle jpegs? When I try to view them, I only get the binary code of the JPEG on the screen. The docs don't mention JPG, only the raw formats. Why? I tought JPEG should be easiest?

I'm really excited what will come! Haha, in some stores they try to convince me to Nikon or Sony. I told them, I'll switch if they got similar features like MagicLantern. Almost every vendor did know about MagicLantern and they haven't been amused. Canon should spent money in this project, it seems they get a alot of "side money" from this here!

Thanx very much for this exciting tool!

UWP

Yes,  that is what happens, The SL1 or 100D, is the only one capable to shot external strobes in live view, with The 650D what you have to do is get focus then go to optical view
finder and press shutter , NOT activating this function in ML , because when you activate this in ML the camera gets frozen.

This means, it's a known bug? And: when I'm focussing with LV my hand changes that much while going back to optical view the image won't be that sharp anymore. This wouldn't be a solution...

Hi!

I bought a Yongnuo flash for my EOS 650d and noticed it does not fire with Liveview. Thank god there's MagicLantern I thought and so I tried ML. I had an older version from march this year on my SD card and I found the flash tweak, where you can use LV flash with non-Canon-flashes and XXXd-cams. What happened was this: I switched on live view, focused with half-pressed shutter. The live view vanished and I can press the shutter completely. The picture will be shot but no flash was firing. Afterwards nothing happened, the menu was frozen I couldn't do anything, just switching off the camera, everything else was blocked. After switching on it seemed half of the battery power had been gone in this operation. The picture was there but because of the missing flash fire too dark. Ok, I thought, maybe the build is too old and so I tried the nightly build from August 2nd. But: same problem, no flash, camera hangs. And now what? Giving back the flash or wait until this bug is fixed? And: had anyone managed to do it with another cam? How does it work? At least it's only some kind of technically trick I learned from the documentation. Maybe it's horrible to get around with it?

Thank you! BTW, this is a marvellous firmware, I don't want to miss it anymore! Everytime I'm thinking about buying another cam I just compare the stuff the new camera can do and the stuff ML can do. ML is far up in the sky compared to all of the rest! You did a great job! Bad news for me: I have to stay with canon cams which is not always the cheap side of the world. But it's worth it! Canon should pump money in this project!