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Trees

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An infrared shot of trees in the Jasper national park, canada.

Camera:Canon EOS 5D MkII
Lens:Sigma 12-24mm
Recording media:RAW (digital)
Title:Trees
Username:Dave_Canon Dave_Canon
Uploaded:27 Aug 2010 - 10:12 PM
Tags:Infra red, Landscape / travel, Trees
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Votes:15

Comments

DouglasMorley
27 Aug 2010 - 10:25 PM

Very impressive.

I've been working with infra red for a little while now - producing black and white monochrome images from the original red.

How do you inject colour into your photographs? Are these colours original? Is your camera adapted for infra red or do you use a filter as I do?

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Nothern_Licht
Nothern_Licht e2 Member 5Nothern_Licht vcard Scotland4 Constructive Critique Points
27 Aug 2010 - 10:59 PM

Very striking image. Nicely converted.

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DeSilver
DeSilver e2 Member 6DeSilver vcard England11 Constructive Critique Points
28 Aug 2010 - 8:33 AM

Love IR and this is a good one.


David.

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Dave_Canon
28 Aug 2010 - 9:30 AM

Douglas, my camera has been converted which makes it much easier. I did try just using a filter but gave up because exposure times were 30 sec and foliage and clouds move a lot in that time.

The sensors on a DSLR are sensitive from ultraviolet through the visible spectrum to near infrared. Once the internal block filter is removed the camera is as sensitive to near infrared as it is to visible light. For the conversion, they install a 720nM or 840nM filter. The latter blocks all visible light whereas the former allows just a little visible liight and is better for colour versions. When you look at the histograms you can see all three channels have data but the level is highest in the red channel. The above effect is created by swapping the red and blue channel. Remember near infrared does not have any visible colour to humans so any representation (even B&W) is false. Hence these are called false colours. However, as there is no truth it does mean you can do whatever you please though red/blue channel swapping is the most popular. I can also easily produce B&W versions as well.

Dave

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agingrocker
agingrocker e2 Member 5agingrocker vcard 1 Constructive Critique Points
2 Oct 2010 - 6:08 PM

Superb comp and colours
Antony

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User_Removed
27 Oct 2010 - 10:06 AM

Love the shot a great contrast with the sky and trees.

keith

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