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A day by the pond

LWIR Multispectral
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#1 Andy Perrin

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Posted 16 June 2019 - 17:40

I spent some time by the pond near my apartment. I've taken photos there previously which you can see on the board here and also captured St. John's Seminary (visible across the water) in LWIR here. Some of the locations are the same, but the wavelengths involved are different in this post.

First a UV shot. I found an interesting way to alter the false colors here, by doing a channel swap and then rotating the hue in the Photoshop hue-saturation dialog until the sky became blue. A side effect was that the seminary looks like a golden castle.
Attached Image: _DSC1988 sunshine ELNikkor85mm S8612 1.75mm+UG11 2mm F22 iso1250 1.6%22 R-B swap and hue rotate UVP.jpg

Here is a crop of the seminary:
Attached Image: _DSC1988 sunshine ELNikkor85mm S8612 1.75mm+UG11 2mm F22 iso1250 1.6%22 R-B swap and hue rotate crop UVP.jpg

Here are some irises (iris versicolor, probably) growing by the water's edge. The colors are the board's standard UV (post WB) colors.
Attached Image: _DSC1980 sunshine ELNikkor85mm S8612 1.75mm+UG11 2mm F22 iso100 30%22 UVP.jpg

Night fell.
Attached Image: _DSC2001 crop crop UVP.jpg

Those irises fluoresced nicely.
Attached Image: _DSC1998 crop UVP.jpg

And here's the seminary in LWIR.
Attached Image: IR_2689 histogram - IR_2733 histogram_blended_fused contrast straighten sharp.jpg

I really need to get a LWIR lens with a smaller field of view.

Edited by Andy Perrin, 16 June 2019 - 17:43.


#2 Andrea B.

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Posted 25 June 2019 - 15:30

A very nice sequence Andy. I like the idea of visiting one place and photographing it in various UVIRy ways as the day passes. We alternate light photographers get to see so many cool aspects of a scene.
Andrea G. Blum
Often found hanging out with flowers & bees.