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Your digital camera is equipped with a sensor made of thousand of small
phototransistors, those cells has the property to be a lot more sensitive
than visible light. That is why manufacturers must add a band pass filter to
stop excess of infrared light. So we can reverse the end result
this daylight band pass filter by an infrared band pass filter which will stop
excess of daylight and let the infrared get through. The results
In that kind of photography, trees and everything that contain chlorophyll
change from green to white. The sky gets very contrasted with their whites
clouds on their dark background. We also can see the difference between by a
cold lightening produced by fluorescent light compared with the more
incandescent light. The white balances choose will make some greats effects from black &
white picture to reddish toned pictures.
To modify a reflex camera.
You will have first to
choose and order the IR filter type from lifepixel.com. Then you send me your camera and filter so I
can start the modification
on which consist to open the camera, take off
circuitry, remove and disassemble the sensor assembly and replacing it band
pass filter by your IR filter
with all precautions to not let dust enter
between the sensor and filter. Sometime, I need to reopen the whole unit to
remove small dust that kept inside.
On first check, we will see some white or
black dots, which are not dust but dead pixels. Those dead pixels which were
almost invisible prior the
modification, become obvious now because the sensor
now can work on a lot more sensitive light bandwidth.
The fees for replacing the filter are roughly from $ 250.00 to $300.00 and
the price of the filter itself. The most advantage with the reflex is the wide
of lens available to use with the camera, however the disadvantage is
that the auto focus is no longer usable because of the IR do not converge as
rays do, but now with the new camera including the ''live view''
mode you still can perform an accurate manual focus. If the live view is not
your camera model, you will have to compensate the focus a little
bit closer as we had to do with old lens that had a small red dot with the
beside the index mark.
On this lens below the focus at
infinity need to be set aligned to the small red dot for IR picture.
modify a point and shoot camera.Here it is far cheaper
and a bit more practical. You only send the camera on which we will apply the
whole modification for around $ 150.00 to $ 250.00
depending on the model, this
include the IR filter which we cut from a blank at the appropriate size. The most
important advantage is that you keep all auto
focus function since the image
sensor and the AF sensor are the same.
To see a lot more IR pictures, you can visit...
François Desrosiers Jean-Pierre Tremblay Rachel Jacklyn Bilodeau
Here some examples from a 3.2 megapixels IR modified Olympus C3020.
to often we forget that IR film still exist like Ilford SFX-200 with
greats results, this film is available in 35mm and 120.
Here some IR pictures from Valerie Genest. More pictures on www.valeriegenest.com