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| 09:33 | Bertl | off to bed now ... have a good one everyone!
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| 09:33 | Bertl | changed nick to: Bertl_zZ
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| 09:49 | BAndiT1983|away | changed nick to: BAndiT1983
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| 14:03 | se6ast1an_ | good progress today with CAD modeling, my list of still open todos is almost empty
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| 16:32 | Bertl_zZ | changed nick to: Bertl
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| 16:32 | Bertl | morning folks!
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| 16:32 | Bertl | great!
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| 17:44 | se6ast1an_ | good morning
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| 18:28 | RexOrCine|away | changed nick to: RexOrCine
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| 18:39 | RexOrCine | "Adventures in Spectrometry" - by Roger Cicala:
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| 18:39 | RexOrCine | https://www.lensrentals.com/blog/2018/03/a-geek-of-many-colors-adventures-in-spectrometry/
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| 18:39 | RexOrCine | "Looking at Cine Lens Color Shifts Using Spectrometry" - by Roger Cicala:
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| 18:39 | RexOrCine | https://wordpress.lensrentals.com/blog/2018/04/looking-at-cine-lens-color-shifts-using-spectrometry/
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| 18:39 | RexOrCine | "The absolute sensitivity of digital colour cameras" (PDF):
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| 18:39 | RexOrCine | https://www.osapublishing.org/oe/abstract.cfm?uri=oe-17-22-20211
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| 18:40 | RexOrCine | Spectron - an open source project for measuring and obtaining digital devices spectral sensitivity curves
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| 18:40 | RexOrCine | Â Initially this was conceived with the goal of constructing an automated device with an aid to accurately measure spectral sensitivity curves for digital camera sensors. The project has a broader use though and can be used to measure spectral sensitivity curves of various light sensitive sensors (not just camera sensors) - for example spectral sensitivity curves of photodiodes.
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| 18:40 | RexOrCine | https://github.com/Alexey-Danilchenko/Spectron
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| 18:48 | Bertl | cool
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| 18:48 | RexOrCine | By far the biggest cause of color shifts is coatings. A modern lens has, say, 16 elements in 10 groups => 20 air to glass interfaces. 4% reflection each gives you 0.96^20 = 44% transmission. The coatings are responsible for bringing that up to a uniform ~90%. If they don't do it in a way that is spectrally uniform, you get color shifts.
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| 18:49 | RexOrCine | - Brandon Dube.
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| 18:49 | RexOrCine | ... who's hard to find. I gave up.
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| 18:49 | RexOrCine | (well because there are a lot of them out there)
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| 18:50 | Bertl | ah, the C12880MA sensor is even available ... for abpit 400 bucks
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| 18:50 | Bertl | *about
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| 18:51 | comradekingu | You want to put it in the camera live, or make a profile of the lens?
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| 18:55 | Bertl | currently no plans for either
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| 18:57 | RexOrCine | Spectral Data Analysis:
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| 18:57 | RexOrCine | https://github.com/brandondube/raynbow
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| 18:57 | RexOrCine | http://brucelindbloom.com/SpectCalcSpreadsheets.html
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| 19:03 | RexOrCine | Found him.
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| 19:05 | comradekingu | I dug up https://hughski.com/colorhugplus.html but it doesn't seem to have materialized
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| 19:05 | comradekingu | Back to bed with me
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| 19:22 | RexOrCine | https://github.com/Olaf-Optical/BigAssTableOfLenses
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| 19:29 | RexOrCine | se6as1an_: Well done lad. Remember I was talking about a map that opens up various pages? Not quite - https://en.wikipedia.org/wiki/Help:Table#Section_link_or_map_link_to_a_row_anchor
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| 20:51 | se6ast1an_ | interesting, we should try this in our mediawiki sandbox
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| 20:51 | se6ast1an_ | like {{Image label small|x=0.5775|y=0.863|scale=400|text=[[#Table row 37|<span style="color: #0654AD;">Albania</span>]]}}
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| 20:51 | se6ast1an_ | off to bed, good night
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| 20:52 | RexOrCine | If you can find a method for using it and it's clear I'll stack it up afterwards. Playing with something else presently
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| 20:52 | RexOrCine | nn
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