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Okavanga — Wild Woods 6

Published: 2011-03-03 08:25:19 +0000 UTC; Views: 653; Favourites: 26; Downloads: 21
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Description Infrared of woods in Bramhall Park.
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Comments: 11

printsILike [2011-03-10 22:34:13 +0000 UTC]

IR certainly produces some lovely images David, not least this one, the blue tinge in the water just contrasts so well with the `albino' vegetation, if you understand me!

👍: 0 ⏩: 1

Okavanga In reply to printsILike [2011-03-11 07:26:34 +0000 UTC]

Michael - Thanks for the comment. You've got the idea about IR work. You have to get your mind round a couple of points. Strictly, there should be no colour in IR images as colour does not exist in IR. However, the nature of the dyes and pigments used in sensors to record visible light spills over into the IR region,with the red sensor being about 4 - 5 times more responsive than the blue which is about 4 times more responsive than the green channel. It is these artefactual colours that IR photographers exploit to give the effects in IR images. Here, I have "channel mixed" red and blue to give a blue sky reflected in the water - this is a favourite IR technique - channel mixing. It becomes quite addictive.

Cheers

David

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printsILike In reply to Okavanga [2011-03-11 16:40:52 +0000 UTC]

Thank you for both these responses David.

IR seems pretty interesting stuff!! I may even consider
it as a possibility for the future, ie when I can afford
to buy a new camera and to convert the current one!!

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robinski [2011-03-04 04:41:56 +0000 UTC]

Very nice!

👍: 0 ⏩: 1

Okavanga In reply to robinski [2011-03-04 07:13:59 +0000 UTC]

Thank you very much Rob Roy! All comments and faves are very much appreciated.

Cheers

David

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samtuya [2011-03-03 13:54:43 +0000 UTC]

like it much

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Okavanga In reply to samtuya [2011-03-03 14:48:31 +0000 UTC]

Hi Thanks for the comment and fave.

Cheers

David

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richardjwakefield [2011-03-03 12:18:59 +0000 UTC]

This very interesting , where does the blue come from ?? It really makes the shot

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Okavanga In reply to richardjwakefield [2011-03-03 14:47:59 +0000 UTC]

Hi Richard - This is shot with the converted Canon 20D which has the 720nm filter built in. There is residual colour artefact from the difference in sensitivities of the sensors - red being the most sensitive. This gives a dull red in some areas even after a WB has been carried out. So, you do a channel swap red-blue and blue appears.

Cheers

David

👍: 0 ⏩: 1

richardjwakefield In reply to Okavanga [2011-03-03 18:18:13 +0000 UTC]

Does that explain why on one of the others there is a purple cast? No matter what the final result is excellent

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Okavanga In reply to richardjwakefield [2011-03-03 19:14:28 +0000 UTC]

Richard - On one of the shots I overdid the changes.

David

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