Messages

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Modules Development / Re: Dual ISO - massive dynamic range improvement for 5D3 and 7D

« on: July 25, 2013, 08:48:17 PM »

How did you compile this? I'm using gcc and getting all sorts of errors?

Thanks.
1. Yes, autoISO with fixed recovery ISO or fixed ISO with relative ISO both okay. Just to report the combo I find not working.
2. IC. Thx.
3. I am using Mac OS and I compile cr2hdr myself. I found that the my exiftool is a perl interface to Image::ExifTool. There is no error message from stdout of cr2hdr, e.g.

Input file     : 5D3_6476.CR2
Full size      : 5920 x 3950
Active area    : 5796 x 3870
Black borders  : 124 left, 80 top
ISO pattern    : dBBd RGGB
Interpolation  : mean23-vsmooth3-contrast
ISO difference : 2.97 EV (784)
Black delta    : 2
ISO overlap    : 6.0 EV (approx)
Hot pixels     : 1055692
Output file    : 5D3_6476.DNG
    1 image files updated

For conversion log, do you mean those tmp.txt at conversion?
I will check if exiftool really work later.

2

Archived porting threads / Re: Canon 5D Mark III

« on: September 12, 2012, 04:52:33 PM »

The problem according to Canon is that highlighted af points hinder metering (unlike the 1d4), it seems to be a design flaw with the many af points and Canon already stated that the upcoming solution "might not make everyone happy". On another forum it was already suggested that's because the solution might be "no solution at all" :-p

I've never heard of this before? Do you have a reference to cite? I've never seen the meter change from the current conditions, even under the lowest light that I can still acquire AF with my fastest F/1.4 lenses.

Even if that was the case, the only point I would want illuminated is my active points and strictly for targeting. Once that has been acquired, it only takes a micro second for the illumination to shut off and the meter to accurate measure light. Regardless under my own tests under an EV of .01 with my handheld meter I saw no difference in the meter when it did light up.

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Archived porting threads / Re: Canon 5D Mark III

« on: September 05, 2012, 06:27:50 PM »

Lastly.... I just donated $50 to the ML cause. Small contribution, but hopefully it helps some!

I just thought of another thing that drives me bonkers sometimes is the ability to see the AF points at times. I wonder if you can figure out how to make it so that it's always on the bright red for confirmation. There was word that Canon was working to fix this problem. I've since gotten used to it. I don't know if it is worthwhile to fix it or not, but just something to add to the 5Dmk3 list (also part of the 7D and 1Dx).

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Archived porting threads / Re: Canon 5D Mark III

« on: September 05, 2012, 06:02:03 PM »

Edit: it may be possible with intervalometer, but with large delays between the shots. Plus, it will increase shutter count a lot.

Yes, this is how I've actually sort of dealt with it with a handheld remote. It's not perfect but it does work. I'm not too worried about the increased shutter count. It's worth it to me as it increases the usable dynamic range when I adjust images for shadow details. Shutters are consumables to me, just don't buy one of my used cameras off of me is all I suggest 

Here's an example of how I use it:
http://www.flickr.com/photos/kinematic/7696561690/in/photostream

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Archived porting threads / Re: Canon 5D Mark III

« on: September 05, 2012, 05:51:11 PM »

Here, multiple exposures work with a single press if you hold the shutter button pressed (in continuous mode). So it shouldn't be hard to automate it to work on a short single press with self-timer.

I don't think I can change the number of shot in a stack, as they seem to be stored in memory and postprocessed when the sequence is finished.

Live bulb is technically possible only in movie mode, at 2 megapixels. But since the 5D3 does proper downsampling, there's probably no downside for this other than lower resolution.

Yes, the continuos mode works if kept held down, as does the remote, but only if you keep your button pressed. Automated single press would be very welcome here.

I rarely do video work but I do quite a bit of long exposure. One of the other things that I wish and this is not exclusive to the 5Dmk3 is to be able to have either an on camera calculator or someway to calculate proper exposure with a 10 stop ND filter. It never meters correctly (usually maxes out at 13 seconds) so it's a guessing game. Now normally not a huge issue as I carry around an exposure chart, but I wonder if there's an easy way to maybe have something like DoF button combined with AE to give values for 10 stop (or whatever is set) exposure, and times that go beyond the 30 second. Be nice to meter, take the value down, then put the filter on, switch to bulb, program my remote for long exposure and expose correctly.

I'll share other thoughts if they come to mind, but that's all so far.

6

Archived porting threads / Re: Canon 5D Mark III

« on: September 05, 2012, 05:20:03 PM »

Great work a1ex. I have two 5Dmk3 would love to beta test.

There's not a lot on the 5Dmk3 that I'm not happy with, but one of the features I personally use all the time is the Multi-exposure mode. I use it like a Sony multi-exposure noise reduction. It would be nice to make it so it would just shoot 9 shots with a single shutter press rather than hitting it nine times.

I also find it interesting that you can stack 9 images into one RAW file, but you can't stack other stacked images into each other for more stacks. Ideally for astrophotography it would be better to have 30 stacks, and this would be really handy at the higher ISOs.

One of the features that I love on the Olympus OMD is Live Bulb. Again I use multi-exposure to simulate something very similar. Multi-exposure overlays the last frame captured in the live-view for a sorta psuedo live bulb exposure. I wonder if it is possible to make this not rely on multi-exposure and to have the exposure just slowly appear on the screen much like the Olympus does with Live Bulb.