March 06, 2006

Infrared

Camera: Fuji FinePix S602z
Filter: Hoya R72
Date: 5th March 2006
Location: Hurst, Campus
Shutter: 1.4s
Aperture: F/2.8
ISO: 160
Comments: This is my first infrared image! I bought a filter that blocks out all wavelengths above 720 nm, which is all visible light. So everything you see here is infrared, which is why the sky is dark (not much IR reflection) and the grass is light (loads of IR reflection). Also it's why this exposure took 1.4s in bright sunshine, and it's a bit hazy.
Post-processing: Cropped, corrected the white balance because the camera had no idea, but the colours haven't been shifted


- 6 comments by 4 or more people Not publicly viewable

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  1. Andrew Ingram

    How do you know how far to shift the infrared wavelengths back to the visible spectrum? Do you just take the range of the image and stretch it to the range of visible light?

    06 Mar 2006, 21:57

  2. Quality, the first digital IR I've seen, I think. Happy memories of playing with a couple of rolls of Ilford SFX

    06 Mar 2006, 22:28

  3. Mark Jarvis

    you are a bastard, i will hold u personally responsible for blowing next term's student loan on shit loads of photography equipment!!!

    06 Mar 2006, 23:24

  4. Nathan Barrow

    Andrew: The reason there is any light detected at all is because the CCD sensor in my camera is slightly sensitive to the near infrared. So the colours are all how they appeared to the camera. I suspect that the red is closer to 'red', ~700 nm, and the blue appears at a longer wavelength ~750 nm, but I'd have to have some data on the CCD's colour filters to be sure. Blue normally registers around 500 nm, but that's all filtered out… so the only blue you see is imperfections in the colour filter in the infrared region because the camera makers didn't think you would want to block out all the visible light!!

    07 Mar 2006, 00:28

  5. Heya. What CSS code have you used to have your pictures come up on a blank separate page when you click on them in galleries? (instead of the background going gray and the picture popping up in the middle i mean)
    many thanks

    07 Mar 2006, 10:10

  6. Nathan Barrow

    Hmm, I haven't!! But sometimes if you click on them before the page is fully loadsed the lightbox doesn't appear… maybe that is happening.
    Also (in Firefox) if you middle click on the images they'll open in a new tab.

    07 Mar 2006, 11:10


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