"Uranus, its rings, and its moons this morning, captured under excellent conditions with the 24in scope.
By far my best capture of the epsilon ring to date.
1hr of data with IR720nm longpass filter."
📸 Tom Williams
x.com/tw__astro/st...
By far my best capture of the epsilon ring to date.
1hr of data with IR720nm longpass filter."
📸 Tom Williams
x.com/tw__astro/st...
September 22, 2026 at 10:06 AM
"Uranus, its rings, and its moons this morning, captured under excellent conditions with the 24in scope.
By far my best capture of the epsilon ring to date.
1hr of data with IR720nm longpass filter."
📸 Tom Williams
x.com/tw__astro/st...
By far my best capture of the epsilon ring to date.
1hr of data with IR720nm longpass filter."
📸 Tom Williams
x.com/tw__astro/st...
The Heimann HMS M11 L3.0 Miniature #Thermopile Sensor combines a compact TO-46 housing with a diffractive lens for improved signal performance, featuring a 3.0 mm focal length with either a 5.5 µm or 8.0 µm longpass filter.
Learn more: https://bit.ly/4gH9woc
##BostonElectronics
Learn more: https://bit.ly/4gH9woc
##BostonElectronics
September 2, 2026 at 6:00 PM
The Heimann HMS M11 L3.0 Miniature #Thermopile Sensor combines a compact TO-46 housing with a diffractive lens for improved signal performance, featuring a 3.0 mm focal length with either a 5.5 µm or 8.0 µm longpass filter.
Learn more: https://bit.ly/4gH9woc
##BostonElectronics
Learn more: https://bit.ly/4gH9woc
##BostonElectronics
We went to Dodekalitten at Kragenæs on the way home today. Interesting place, but I'd like to go when it's less busy.
IR Converted X-T2 with 760nm longpass filter. Hurriedly tweaked on my phone.
IR Converted X-T2 with 760nm longpass filter. Hurriedly tweaked on my phone.
July 28, 2026 at 8:27 PM
We went to Dodekalitten at Kragenæs on the way home today. Interesting place, but I'd like to go when it's less busy.
IR Converted X-T2 with 760nm longpass filter. Hurriedly tweaked on my phone.
IR Converted X-T2 with 760nm longpass filter. Hurriedly tweaked on my phone.
I had a Fuji X-T2 body converted to full spectrum sensitivity. So far having a lot of fun experimenting with filtration and trying to decide what to use for an upcoming project- I really want to punch up the contrast between the little wetlands and the surrounding landscape
July 25, 2026 at 4:07 PM
I had a Fuji X-T2 body converted to full spectrum sensitivity. So far having a lot of fun experimenting with filtration and trying to decide what to use for an upcoming project- I really want to punch up the contrast between the little wetlands and the surrounding landscape
This works rather nicely and has a lot of potential.
Here's a comparison of different methods of detecting fluorescence. Explanation in the alt text.
Hopefully we can continue developing this system and get enough comparative data to couple what we see from the sensor with soil properties.
/end
Here's a comparison of different methods of detecting fluorescence. Explanation in the alt text.
Hopefully we can continue developing this system and get enough comparative data to couple what we see from the sensor with soil properties.
/end
June 21, 2026 at 8:37 PM
This works rather nicely and has a lot of potential.
Here's a comparison of different methods of detecting fluorescence. Explanation in the alt text.
Hopefully we can continue developing this system and get enough comparative data to couple what we see from the sensor with soil properties.
/end
Here's a comparison of different methods of detecting fluorescence. Explanation in the alt text.
Hopefully we can continue developing this system and get enough comparative data to couple what we see from the sensor with soil properties.
/end
However, doing this requires a load of longpass filters in addition to the lights. This gets expensive, and changing filters with mucky hands sucks. What if there is an easier way?
Luckily for us there is! Digital cameras ARE multispectral sensors!
en.wikipedia.org/wiki/Bayer_f...
Luckily for us there is! Digital cameras ARE multispectral sensors!
en.wikipedia.org/wiki/Bayer_f...
Bayer filter - Wikipedia
en.wikipedia.org
June 21, 2026 at 8:37 PM
However, doing this requires a load of longpass filters in addition to the lights. This gets expensive, and changing filters with mucky hands sucks. What if there is an easier way?
Luckily for us there is! Digital cameras ARE multispectral sensors!
en.wikipedia.org/wiki/Bayer_f...
Luckily for us there is! Digital cameras ARE multispectral sensors!
en.wikipedia.org/wiki/Bayer_f...
We can use fluorescence to detect all kinds of things. Police and forensics bods routinely use it to find evidence like blood and other icky fluids.
It also works with bone. Here is some bone fluorescing away in a profile (see the alt text for explanation)
It also works with bone. Here is some bone fluorescing away in a profile (see the alt text for explanation)
June 21, 2026 at 8:37 PM
We can use fluorescence to detect all kinds of things. Police and forensics bods routinely use it to find evidence like blood and other icky fluids.
It also works with bone. Here is some bone fluorescing away in a profile (see the alt text for explanation)
It also works with bone. Here is some bone fluorescing away in a profile (see the alt text for explanation)
Flowers in infrared. Shot with a 900mm longpass filter blocking all visible light.
#MinimalMonday #infrared #photography #bloomscrolling #monochrome #flowers
#MinimalMonday #infrared #photography #bloomscrolling #monochrome #flowers
May 11, 2026 at 6:52 PM
Flowers in infrared. Shot with a 900mm longpass filter blocking all visible light.
#MinimalMonday #infrared #photography #bloomscrolling #monochrome #flowers
#MinimalMonday #infrared #photography #bloomscrolling #monochrome #flowers
Quartz lightguides beat fibers below 250 nm. There's work showing filter fluorescence can fake UV signals, though I don't have the reference handy. Have you checked your 280 nm longpass for secondary emission?
April 23, 2026 at 3:25 AM
Quartz lightguides beat fibers below 250 nm. There's work showing filter fluorescence can fake UV signals, though I don't have the reference handy. Have you checked your 280 nm longpass for secondary emission?
You avoid fibers. Even UV-grade silica attenuates heavily below ~250 nm. The real test is a cutoff filter stack—if the signal vanishes after a 280 nm longpass, it wasn't real UV.
April 23, 2026 at 1:14 AM
You avoid fibers. Even UV-grade silica attenuates heavily below ~250 nm. The real test is a cutoff filter stack—if the signal vanishes after a 280 nm longpass, it wasn't real UV.
In case you were wondering about how to photograph through polyester/cotton facemasks...<<LP1000 SWIR Longpass 1010-2300nm>>...that is the parameters for selecting filters. In case, you know, you wanted to take photos of someone wearing such a mask.
April 3, 2026 at 1:57 AM
In case you were wondering about how to photograph through polyester/cotton facemasks...<<LP1000 SWIR Longpass 1010-2300nm>>...that is the parameters for selecting filters. In case, you know, you wanted to take photos of someone wearing such a mask.
March 2, 2026 at 8:45 AM
🦇 Find bats spooky? What if they glow?
Glowing Green:
A Quantitative Analysis of Photoluminescence in Six North American Bat Species
onlinelibrary.wiley.com/doi/10.1002/...
Encourages further exploration into potential evolutionary and functional roles of photoluminescence across mammalian taxa.
Glowing Green:
A Quantitative Analysis of Photoluminescence in Six North American Bat Species
onlinelibrary.wiley.com/doi/10.1002/...
Encourages further exploration into potential evolutionary and functional roles of photoluminescence across mammalian taxa.
October 31, 2025 at 3:00 PM
🦇 Find bats spooky? What if they glow?
Glowing Green:
A Quantitative Analysis of Photoluminescence in Six North American Bat Species
onlinelibrary.wiley.com/doi/10.1002/...
Encourages further exploration into potential evolutionary and functional roles of photoluminescence across mammalian taxa.
Glowing Green:
A Quantitative Analysis of Photoluminescence in Six North American Bat Species
onlinelibrary.wiley.com/doi/10.1002/...
Encourages further exploration into potential evolutionary and functional roles of photoluminescence across mammalian taxa.
Silver birch #trees and blue sky.
Full spectrum, 530nm longpass filter.
#infrared #photography #sky #landscape #scape
Full spectrum, 530nm longpass filter.
#infrared #photography #sky #landscape #scape
August 7, 2025 at 7:17 AM
Silver birch #trees and blue sky.
Full spectrum, 530nm longpass filter.
#infrared #photography #sky #landscape #scape
Full spectrum, 530nm longpass filter.
#infrared #photography #sky #landscape #scape
* Absorptive glass filters from aliexpress, often more of less copies of the schott lineup, decently sharp cutoff, mostly only usable as longpass, high OD possible depending on thickness, easy to cut and grind to size from larger 100x100mm sheets if needed
July 30, 2025 at 5:07 PM
* Absorptive glass filters from aliexpress, often more of less copies of the schott lineup, decently sharp cutoff, mostly only usable as longpass, high OD possible depending on thickness, easy to cut and grind to size from larger 100x100mm sheets if needed
Another shot of an oarweed kelp bed at low tide. Kayaking out off the shore looks like a lot of fun.
Shot in full spectrum / #infrared using a 530nm longpass filter.
#photography #seaweed #nature
Shot in full spectrum / #infrared using a 530nm longpass filter.
#photography #seaweed #nature
July 16, 2025 at 7:33 AM
Another shot of an oarweed kelp bed at low tide. Kayaking out off the shore looks like a lot of fun.
Shot in full spectrum / #infrared using a 530nm longpass filter.
#photography #seaweed #nature
Shot in full spectrum / #infrared using a 530nm longpass filter.
#photography #seaweed #nature
