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Raw files from Sinar eMotion

elstv

New member
Hi there.
I've recently acquired an eMotion 22 for my contact 645. I've got a eMotion 75 on the way also.
I couldn't get any of Sinars apps to work, and I don't have the original CCD profile files.

After a long battle I finally managed to extract usable DNGs from it. This involved Brumbaers tools running on an ancient version of OSX in a virtual machine.
I'm super happy with the results so far, but I'm wondering if anyone has any better/alternative workflows?
 

buildbot

Active member
Welcome to the extremely small emotion DB club!! It’s a cool place to be. Fun fact - they use intel xscale (arm!) processors!

I have been working on a python utility to process emotion22 files, I posted one a little bit ago. also recently got a 75LV - I am working on adding it to the utility.

I was planning to release it once I finished that, though right now it is command line only and big downside, I have not yet figured out how the backs calibration files, the ones that come on a CD that is - are formatted. Instead it relies on a bit of a hack/work on the users part to create “flats”, like in astrophotography. Basically you capture 25-50 frames of a white background to calibrate the relative response for each pixel. You can optionally have a lense mounted when you do this to calibrate the entire optical train even, including removing dust! However, at least on my hy6, only the AF lenses are stored in the files metadata so knowing which flat to use would mostly be a manual process (unless you use a lensless one)

It does support using the bias and dark reference files the back generates every few shots, and spits out a calibrated DNG. I learned a lot about how CCD calibration works and I am sure some of the math is still incorrect, but I am happy with how the files are now.

I’ll get working on finishing it up and post a link here! Maybe with a simple GUI even.
 

buildbot

Active member
Capture One?
Does not support Sinar .IA raws to my knowledge.

Edit - yeah it can't see them. Sinar .IA raws are fairly unique and don't include the dark/bias frames(s). The back has these in separate .BR files (and white flats in .WR for the 75LV too!) and their software processes them together to create a finished raw. Brumbaers tool does this very well, but as the original posted said, it only works on 32bit MacOS and that is a bit of pain these days. I think any software that uses libraw under the hood would be able to read the raw pixel data from the .IA files, but it has no idea how to combine the .BR & optionally .WR PLUS the CCD calibration file these backs come with.
 
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anyone

Well-known member
In my experience with legacy hardware it’s a good idea to have for each piece of hardware the fitting computer as well. In the end you can just convert the funky raws to DNG and proceed on your current system.
 

elstv

New member
Buildbot, thankyou for the welcome., Wow that's an impressive project you've undertaken, I look forward to anything you might release. Let me know if there is anything I could help test when you get to that stage.

I have been in touch with Sinar and they have said if I supply my serial numbers they could check their archives (for a fee) to see if they have the CCD files available. Do you think this is a worth having?
 

buildbot

Active member
Buildbot, thankyou for the welcome., Wow that's an impressive project you've undertaken, I look forward to anything you might release. Let me know if there is anything I could help test when you get to that stage.

I have been in touch with Sinar and they have said if I supply my serial numbers they could check their archives (for a fee) to see if they have the CCD files available. Do you think this is a worth having?
Haha thank you! Its been a fun project. Once I get it a little more cleaned up/ready for others would love to know how you think the output compares to emotionDNG! Or if you know about color science/math, you could probably tell me what I am doing wrong I am sure are some things still.

The CCD calibration files do seem to be important, but I currently don't know how they work. Possibly the 75LV backs already have their calibration installed, that could be what the .WR (white/flat reference) files being generated are from. I think emotionDNG can build one for you as well? Depends on how much they want in terms of the fee I suppose. I am amazed they have all of their calibration files still, these things are 17 years old at this point!
 

elstv

New member
Sinar said $60 for the reference file (if they have it). I might try this.

In other news I now have two Sinar backs! Long story short, after searching for a year for a Contax digital back, I came across two: an eMotion 22 and an eMotion 75.
Not sure which to keep but probably the 75.

Is this a good forum to sell the second one on?
 
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