IR Lum image

[Ninjin]

This is infrared photography in the 720+ nm range.

 

Author's technique of shooting.

Converted Nikon 7100.

Matrix Toshiba HEZ1 TOS-5105.

Spectrosil 2000 matrix filter.

SCHOTT RG-9 camera filter by Uviroptics Lab. Many thanks for this filter!

 

[upd. Sorry, my forum photo uploader still doesn't work.]

[ulf]

Very nice image.

I found it by digging into your link above.

What is a Lum filter?

is it a stack with more than just a RG9 filter?

[colinbm]

Ninjin, that is a good photo of the corn fluorescing in IR. I hope you do well.

The collection is all fascinating to see thanks.

[nfoto]

Kudos for good work. Being noticed by RPS is always encouraging ....

 

By the way, I have upgraded your membership so you can post more images.

[Andy Perrin]

Gorgeous Ninjin! Congratulations on fantastic work.

[bvf]

How come all you guys can see the images but I can't? I can't even see the link that Ulf mentions.

[Cadmium]

Bernard, Same here, I don't see a link.

Andy's message was at 8:02. Ninjin's post was edited at 10:35. Your message was at 14.31, so something may have been removed accidentally at 10:35.

I am sure she will get it back soon.

[ulf]

Here it is:

https://www.scienceandindustrymuseum.org.uk/sites/default/files/styles/smg_carousel_zoom/public/2021-01/0610_Green%20Living%20Glowing%20Corn%20by%20Evgeniya%20Korneeva.jpg

[bvf]

Ah - very neat. Mind you, the lazy option would have been to take a normal shot and just make a negative of it!

 

[Cadmium]

Ulf, Yes, that is the photo/link.

It is IR LUM = UV or Visual Green Induced IR Fluorescence, what I call VIIRF, or GIIRF. Or when using UV, then UVIIRF.

It is not a stack it is just RG9 on the lens. Total darkness, illuminated with visual green light or UV, I don't know which for that photo.

[ulf]

OK thanks Steve.

Then an almost identical effect could be obtained with a R72 filter.

The drop at longer wavelengths for the RG9 is not that important as the camera's sensor's sensitivity also drop drastically in the upper region

[Cadmium]

Ulf, I can't say for sure, you should ask Ninjin.

 

From:

https://www.sciencea...nding-our-world

 

Scroll down to "Understanding Our World" section. Then scroll right through photos to photo #34 to read her caption.

 

Ninjin's photo:

 

 

This photo was taken in complete darkness. The corn was lit by invisible wavelengths of light, including ultraviolet.

The corn absorbed the energy and re-emitted it as invisible infrared light. The camera is set up to capture infrared.

The parts of the corn containing chlorophyll, like the leaves, glow brightest.

Green living – glowing corn by Evgeniya Korneeva

[dabateman]

No Bernard the lazy way is to just eat the corn. I don't think it would have the same pop. If you shot it with BW400CN, maybe. That film had some odd character to it and how you pushed the C41 process.

But then developing film is definitely not for the lazy these days.

[bvf]

But then developing film is definitely not for the lazy these days.

 

Not for the un-rich either. I'm staggered at the cost of film and processing materials these days. I'm happy to have gone 100% digital.

[Cadmium]

Ninjin, Very nice image! Congratulations!