Author Topic: Thread photos dual iso  (Read 316674 times)

Walter Schulz

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Re: Thread photos dual iso
« Reply #75 on: January 06, 2014, 09:25:43 PM »
What am I missing exactly?

Something called "progress".

Ciao
Walter
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4cc3ss

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Re: Thread photos dual iso
« Reply #76 on: February 02, 2014, 05:47:30 PM »
I need to venture out my cave once in a while & start using dual iso, the posted photos are simply amazing.

Good job ;)
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a1ex

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Re: Thread photos dual iso
« Reply #77 on: February 02, 2014, 05:53:51 PM »
Hello... Nikon has this feature built-in, just shoot at ISO 100 ;)

(look in the source; one of the codename for dual ISO was "Nikon mode")

4cc3ss

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Re: Thread photos dual iso
« Reply #78 on: February 02, 2014, 05:59:56 PM »
Shhh... i'm here as a canon user A1ex, i have a Nikon site for Nikon camera. ;)

Btw you still think about my offer :P

Best regards,
4cc3ss
Canon uses Nikon's 2nd hand parts.

Audionut

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Re: Thread photos dual iso
« Reply #79 on: February 17, 2014, 04:22:07 PM »
One from the other day.


chris_overseas

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Re: Thread photos dual iso
« Reply #80 on: February 17, 2014, 05:49:07 PM »
I'm really interested to see your photos but unfortunately your links are broken - DropBox permissions issue maybe? The reason I'm so curious is because I'm going to Son Doong Cave in April and have been wondering what sort of results I'll be able to get with dual ISO. I'll have limited battery capacity, will only have once chance at the trip and I won't be able to do any processing until the trip is over so the more prepared I can be the better.

Went to the Jenolan caves recently, couldn't believe the detail I was able to extract from this one photo!
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Audionut

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Re: Thread photos dual iso
« Reply #81 on: February 20, 2014, 09:02:17 AM »
Testing the limits.




mad.eos

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Re: Thread photos dual iso
« Reply #82 on: February 25, 2014, 10:24:27 AM »
(posted by mistake on another thread about dual_iso)

hi guys,

I would like to share a dual_iso picture just to show one of the big advantages of using the dual_iso module while having some dr with one shot.

Kitty scratching in HDR! May be plain to some, I loved the final result! ;)

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Aftab

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Re: Thread photos dual iso
« Reply #83 on: March 03, 2014, 10:19:32 AM »
Folks, I am new to magic lantern. Last couple of weeks I have trying dual iso with 5DII and I am soooooooo impressed. :)
I want to thank the awesome people behind the curtain.
I want to share a picture I have taken using dual iso. This is my first post here. Let me see if I can post the pic.



Edit: looks like it didn't work. Another try.


Danne

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Re: Thread photos dual iso
« Reply #84 on: March 03, 2014, 01:05:52 PM »
Nice examples!

sqd

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Re: Thread photos dual iso
« Reply #85 on: March 03, 2014, 06:19:44 PM »
I would like to share a dual_iso picture just to show one of the big advantages of using the dual_iso module while having some dr with one shot.

Indeed, sharing a shot here that was also taken with dual ISO - maybe not the best example for a situation that has a lot of dynamic range, but still, the difference was noticeable that day from dual and non-dual iso shots :) Point is, dual iso takes away nothing from shooting moving objects.

Full size: http://www.flickr.com/photos/squareddesign/12614732584/


Starclassic

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Re: Thread photos dual iso
« Reply #86 on: March 08, 2014, 05:41:40 AM »
First time with dual_iso 600D.


Luiz Roberto dos Santos

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Re: Thread photos dual iso
« Reply #87 on: March 08, 2014, 12:25:38 PM »
600D  :-\


sqd

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Re: Thread photos dual iso
« Reply #88 on: March 12, 2014, 11:05:21 PM »
Four dual ISO shots stitched together

Full size: http://www.flickr.com/photos/squareddesign/13111118715/lightbox/

dubzeebass

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Re: Thread photos dual iso
« Reply #89 on: March 16, 2014, 09:31:57 PM »
Here's Chicago from yesterday when they dyed the river.


Danne

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Re: Thread photos dual iso
« Reply #90 on: March 16, 2014, 10:27:49 PM »
sweet man!

riclim

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Re: Thread photos dual iso
« Reply #91 on: March 17, 2014, 07:16:07 AM »
Canon 1100D
f/22, 1/100sec, ISO100/ISO1600 Dual ISO

My first try of Dual ISO function~


Before, normal shoot will jpeg


After, shoot with Dual ISO



Compare of the all photo


Zoom in view of the compare photo

Marsu42

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Re: Thread photos dual iso
« Reply #92 on: March 17, 2014, 07:48:52 AM »
My first try of Dual ISO function~

The use of dual_iso is questionable for static scenes, as some shots in this thread are - is this explained in the in-camera help lines(s) clearly enough? For a good example look at the cat shot above.

This method is ok if you just want a quick hdr extension, but otherwise you might want to try dual_iso vs. an actual 2x bracketing enfuse/hdr shot with overlap of ~2ev... and I would suppose for "keepers" with details in the shadows and highlights a >2x multiple bracket will be superior hands down if viewed @100% mag.

Audionut

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Re: Thread photos dual iso
« Reply #93 on: March 17, 2014, 08:26:37 AM »
The use of dual_iso is questionable for static scenes,

Negative!

Most all of the original problems with dual_iso are now fixed with the latest cr2hdr.

Bracketing shots will have motion effects on all but the extreme static scenes.  Kill the shutter faster.  Arguably, longer to post process. 

That's 3 issues with bracketing vs dual_iso that I can think of, off the top of my head.  Using ISO to bracket, instead of dual_iso, now that would be silly :P

Marsu42

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Re: Thread photos dual iso
« Reply #94 on: March 17, 2014, 09:20:37 AM »
Using ISO to bracket, instead of dual_iso, now that would be silly :P

Of course your evaluation and choice of words is of course up to you, but from my experience I strongly disagree with your assessment, and afaik alex also wrote that dual_iso is for high dr motion. Btw usually you will do shutter bracketing, not iso.

Even ignoring the acr wb problem the loss of fine detail in shadows and highlights is  noticeable, an inherent problem since the dual_iso shots simply only have half of the data. Also with "real" bracketing you have a wide post-processing choice, often exposure fusion is preferable to blending/hdr... not to speak of real detail work with ps layer. I'd advice every aspiring "dual_iso only" user to really try both options and look for the advantages and disadvantages him/herself.

Audionut

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Re: Thread photos dual iso
« Reply #95 on: March 17, 2014, 09:22:23 AM »
You shared your opinion, I shared mine!

and afaik alex also wrote that dual_iso is for high dr motion.

a1ex shared 1 aspect of photography where dual_iso would rain supreme, yes.
As a photographer, you understand the rules of exposure and composition, then you break them.

I use dual_iso, every, single, time, the shadows in my shots are more the -8 EV from saturation.  I don't conform to rules.  I make things work as I need them too  ;)

a1ex

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Re: Thread photos dual iso
« Reply #96 on: March 17, 2014, 09:30:26 AM »
My tripod prefers to stay at home usually (so hand-held shooting counts as motion too).

Here's a (hopefully unbiased) test to show how much resolution you are losing: http://www.magiclantern.fm/forum/index.php?topic=7139.msg99437#msg99437

Audionut

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Re: Thread photos dual iso
« Reply #97 on: March 17, 2014, 05:05:50 PM »
It became extremely windy, and this was the only place where the sand wasn't going to fly away.

As Captured



+4 EV in post - ie:  Exposing for the midtones in camera



dual_iso

Marsu42

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Re: Thread photos dual iso
« Reply #98 on: March 17, 2014, 07:01:26 PM »
My tripod prefers to stay at home usually (so hand-held shooting counts as motion too).

Depends on the hdr software you're using, at least Photomatrix is extremely effective in compensating small frame differences - and all my lenses save one have IS anyway.

Here's a (hopefully unbiased) test to show how much resolution you are losing:

I admit I'm often shooting worst-case situations - furry animals with a good lens, so there's a lot of very fine detail esp. in the highlights and this is where I see the resolution loss of dual_iso. Still, better than clipping and no details at all, that's why I'm a big fan of it :-)

Audionut

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Re: Thread photos dual iso
« Reply #99 on: March 17, 2014, 07:56:50 PM »
and all my lenses save one have IS anyway.

IS only helps with spacial motion, not temporal motion.