Shortwave Swap

Joined
Jul 27, 2012
Messages
481
Location
US
Here is a swapped version of a Schott UG5 stack.
This UG5 stack is a mix of UV, Blue, and Green. UG5 is stacked with S8612 to suppress the IR portion of the UG5 transmission.
UV is less abundant than visual and IR, and the camera sensor is less sensitive to UV, so the higher transmission amplitude of the UV works well in balance with the lower transmission amplitude of the Blue and Green portion of this transmission curve.

This is the same idea as swapped 'false color' 590nm IR ("Super Color"),
except this is the 'other end of the rainbow'.
So instead of pure UV (or pure IR), we mix the UV (or IR) with some portion of visual. In the case of 590nm IR we mix the IR with some red light. In this case we are mixing the UV with some blue/green light.

Note: This variety of Rudbeckia has no pattern in visual or IR, so the red/lavender pattern visible in this UV/B/G photo is not seen without including the UV portion of the spectrum.
I have included IR and visual examples of Rudbeckia to illustrate this point.
(some Rudbeckia varieties do have a visual pattern)

UG5 Stack
Subscribe to see EXIF info for this image (if available)


Rudbeckia 720nm IR
Subscribe to see EXIF info for this image (if available)


Rudbeckia (what we see visually)
Subscribe to see EXIF info for this image (if available)


Subscribe to see EXIF info for this image (if available)


Multiple swap tests from two UG5 stacks
Subscribe to see EXIF info for this image (if available)
 
Last edited by a moderator:
Joined
Jul 27, 2012
Messages
481
Location
US
  • Thread Starter Thread Starter
  • #4
Thank you Kodiak and Alex. :)
 
Last edited by a moderator:
Joined
Jul 27, 2012
Messages
481
Location
US
  • Thread Starter Thread Starter
  • #6
This is the original UG5 stack shot.
Using the RAW file, CNX2 white balance marquee, and auto-levels in Photoshop.

Subscribe to see EXIF info for this image (if available)
 
Last edited by a moderator:
Links on this page may be to our affiliates. Sales through affiliate links may benefit this site.
Nikon Cafe is a fan site and not associated with Nikon Corporation.
Forum post reactions by Twemoji: https://github.com/twitter/twemoji
Copyright © 2005-2019 Amin Forums, LLC
Top Bottom