Friday, 7 December 2012

Dartmoor after the Rain

It has been wet start to winter on Dartmoor.  More squelching and squerching with Cosmo.  Roll on some snow.
Dartmoor in Black and White

I'm getting all excited about Infra-Red photography again, after all these years.

Infra-red photography is when you use black and white film that has an extended sensisitivity to the "Near Infra-Red".  Normally, film is sensitive just to the visible part of the electromagnetic spectrum (between about 250 to 680 nm wavelength), these are called 'panchromatic' films.  Infra-red films extend this sensitivity by another 200 nm, passed the red and into the near infra-red. (BTW, beyond that is the "Far infra-red" which is what we feel as heat.)

The effect is that colours come out differently; blues reflect virtually no IR light, so appear void of light (ie black) whilst greens reflect lots and appear very light.

Although I am using digital RAW files, their spectral sensitivity enables me to play with digital 'filters' to achieve similar effects.

Anyway, I'll be doing more, so next time, you'll know why they photographs look different.

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