An Open Source Mirrorless Camera You’d Want To Use
Making a digital camera is a project that appears easy enough, but it’s one whose complexity increases depending on the level to which a designer is prepared to go. At the simplest a Raspberr…
cross-posted from: https://lemm.ee/post/44155947
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This is super interesting, and a project I'm gonna keep an eye on. Not least of all because I've got a good selection of E-mount lenses.
One thing that's gonna be a struggle is all the specific lens corrections in photo software obviously will not be present for this. I wonder if the body behaves optically similarly enough to an existing Sony camera to be able to reuse those profiles.
I'd think they'd handle this with calibration. It doesn't need to be as sexy as commercial, it just needs to have a reasonably easy process to fix it.
Something like when you get a new lense, you aim it at a laser difraction pattern on a clean wall.
Now you don't worry about minors differences in body or lenses.
You aim it at what? Who has that?
It would be super cheap to make a laser difraction grid. You could map the lense deformation because you know the lines on the grid are straight. This would be solely for mapping the properties of the lens / mount and how to handle defamation profiles. Once you dial in the lens you probably wouldn't need to run it again assuming it can id the lens when you mount it.
I would say you could use red green and blue lasers and look at convergence, But I'm not sure in any decent hardware that that would actually be off
Edit: you should note, iPhone already does this for face ID. It's not really that much of a stretch to make it go the other way.
“It would be” so you haven’t done this but speak confidently about it being cheap and accessible?
You can purchase laser pointers with grid diffraction grating right now with zero effort to DIY.
You can purchase house decoration style diffraction gratings which are a larger format but are intensely bright. They are however less portable.
You can follow a thought emporiums instructions on how to create diffraction gratings, which includes the software and the process,
And yes, I already own a 300 milliwatt laser with a diffraction pattern that would work for this.
And these things produce actually perpendicular lines?
They have an incredibly high degree of accuracy. It's the same thing iPhones are using for face ID. And if you needed it to be easier it doesn't have to be straight lines as long as it's dots in known locations
If the sensor is the same size the lens corrections should be identical. Now if it communicates focal length info into the metadata (on a zoom lens), or any data for that matter, that's a different issue
I believe focal length & aperture EXIF metadata do factor into modern lens correction profiles
It's worth highlighting that the profiles are typically based on the combination of a lens and a body, one lens used on two different camera bodies would result in two different profiles being used
