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Heat phot with Canon G2 and IR filter - possible?

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Anonymous
January 4, 2005 2:30:25 PM

Archived from groups: rec.photo.digital (More info?)

Hi

I wonder if it would be possible to take a heat-photo of my house,
using the Canon G2 and an IR filter of some kind?

a) Is the Canon G2 able to photograph IR/UV light - ie.
heat-dissepation?
b) If so, what filter will be best?
c) Maybe best to take nightshots?

I would really like to do this, to be able to track down where to
insulate more.

Happy shooting

JJ

More about : heat phot canon filter

Anonymous
January 4, 2005 10:40:24 PM

Archived from groups: rec.photo.digital (More info?)

Jens Jakob Andersen wrote:
> Hi
>
> I wonder if it would be possible to take a heat-photo of my house,
> using the Canon G2 and an IR filter of some kind?
>
> a) Is the Canon G2 able to photograph IR/UV light - ie.
> heat-dissepation?
> b) If so, what filter will be best?
> c) Maybe best to take nightshots?
>
> I would really like to do this, to be able to track down where to
> insulate more.

No, this won't work.

Cameras are sensitive to near-IR - in the region on 700nm wavelength.
Heat from your house is far-IR radiation - in the region of 10um
wavelength. "IR photography" only works with reflected solar radiation,
not with naturally emitted radiation by objects at "room temperature".

Cheers,
David
Anonymous
January 4, 2005 11:08:27 PM

Archived from groups: rec.photo.digital (More info?)

Jens Jakob Andersen wrote:
> Hi
>
> I wonder if it would be possible to take a heat-photo of my house,
> using the Canon G2 and an IR filter of some kind?
>
> a) Is the Canon G2 able to photograph IR/UV light - ie.
> heat-dissepation?
> b) If so, what filter will be best?
> c) Maybe best to take nightshots?
>
> I would really like to do this, to be able to track down where to
> insulate more.

Sorry, you can only photograph near infrared ("Dark"-red about 7-800nm and
remote control signals).
This may add fancy details to your ordinary pictures, but I think you are
still photographing reflected light, not emitted energy.

Infrared heat need a special "camera" close to $5000 for the simplest
100x120 pixel sensors. Higher resolution sensors have export restrictions...
Google for "thermal camera", not "IR camera".

Rent a specialist with a camera. I have tried several heat-cameras for
several days, and still find them difficult to use correct. You need
experience on how to take these shots.
Remember that your house should be pressurised if you take the pictures
outside, and use negative air pressure for pictures inside. Then the heat
leaks the right way...
Sunlight and bright lamps should be avoided, but you can use it in daylight.
For best result, paint the house black... (the reference is a "black" body,
all other materials must be corrected according to lists).

--
Frode P. Bergsager
!