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A dandelion in IR light
Feb 7, 2023 17:45:45   #
JimH123 Loc: Morgan Hill, CA
 
The attached image was taken with a modified Sony A6300 that has been converted to a mono sensor with no CFA and no UV-IR cut filter making it B&W only with full spectrum IR. And for this shot, I used a Red filter in which the IR light, which also passes through the red filter, produces this result. The dandelion is completely yellow in visible light and I cannot see the black squiggles that are so prominent in IR light. I was not expecting to see this result.

Hit the download button and then click on the image again to blow it up so you can see what I am seeing.

What is happening are the things we see in black, although they are close to the same yellow color, do not reflect IR light and show up as black.


(Download)

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Feb 7, 2023 18:17:33   #
kpmac Loc: Ragley, La
 
Very nice. Would love to see it in IR when it goes to seed.

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Feb 7, 2023 18:33:46   #
JimH123 Loc: Morgan Hill, CA
 
kpmac wrote:
Very nice. Would love to see it in IR when it goes to seed.


I will seek one out when one goes to seed.

Thank you

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Feb 7, 2023 18:52:23   #
UTMike Loc: South Jordan, UT
 
Beautiful result, Jim!

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Feb 8, 2023 07:28:12   #
joehel2 Loc: Cherry Hill, NJ
 
Beautifully done.

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Feb 8, 2023 08:17:06   #
dpullum Loc: Tampa Florida
 
There is a new section devoted to IR camera photography, you can subscribe to it under your profile.

"mono sensor with no CFA and no UV-IR cut filter making it B&W only with full spectrum IR. " ?????? What's a CFA Filter!! That's a new one on me...

So, my education continues, thank you Jim: "to convert the color image sensor of a generic digital camera to a monochrome sensor, we must remove the bayer filter layer(= Color Filter Array=CFA) on the image sensor. This is called “Debayering”." To be technical "A Bayer filter mosaic is a color filter array (CFA) for arranging RGB color filters on a square grid of photosensors. Its particular arrangement of color filters is used in most single-chip digital image sensors used in digital cameras, camcorders, and scanners to create a color image. " Named after Mr Bayer of Kodak the originators of digital photography... who's ol boy management said, "but we make film."
http://www.centralds.net/cam/?p=8561

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Feb 8, 2023 09:28:48   #
JimH123 Loc: Morgan Hill, CA
 
dpullum wrote:
There is a new section devoted to IR camera photography, you can subscribe to it under your profile.

"mono sensor with no CFA and no UV-IR cut filter making it B&W only with full spectrum IR. " ?????? What's a CFA Filter!! That's a new one on me...

So, my education continues, thank you Jim: "to convert the color image sensor of a generic digital camera to a monochrome sensor, we must remove the bayer filter layer(= Color Filter Array=CFA) on the image sensor. This is called “Debayering”." To be technical "A Bayer filter mosaic is a color filter array (CFA) for arranging RGB color filters on a square grid of photosensors. Its particular arrangement of color filters is used in most single-chip digital image sensors used in digital cameras, camcorders, and scanners to create a color image. " Named after Mr Bayer of Kodak the originators of digital photography... who's ol boy management said, "but we make film."
http://www.centralds.net/cam/?p=8561
There is a new section devoted to IR camera photog... (show quote)


You got it correct about the CFA. It is a different experience shooting a camera without the CFA. Reminds me of my Tri-X film days, only better. I can use all manner of colored filters and IR filters, with the same effects. If I want a yellow filter effect, I can use a cut UV-IR filter to remove the IR light, plus a yellow filter, and I get the same text book effect that a yellow filter produces.

But an added benefit is that I may elect to use a legacy lens that is subject to CA problems. But by using a filter that limits what light reaches the sensor, no CA distortion shows up.

This camera has turned out to be such a fun camera to play with. So this, and another modified camera that still has the CFA, but this time modified to full spectrum IR so I can use color.

Thank you for pointing out the IR forum. I hadn't noticed that it had been added.

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