Infra-red

Do all digital cameras have infra-red filters in front of the sensors?
Or to ask it another way, what sort of infra-red photography can you do
with a digital camera?

Daniele

"D.M. Procida" schreef in
bericht
...
Do all digital cameras have infra-red filters in front of the sensors?
Or to ask it another way, what sort of infra-red photography can you do
with a digital camera?

Daniele

Look for a Canon 20Da. (dslr)
Or a Sony with Nightshot (compact)
Good luck

In article
,
D.M. Procida wrote:

Do all digital cameras have infra-red filters in front of the sensors?
Or to ask it another way, what sort of infra-red photography can you do
with a digital camera?

almost all digicams have infrared cut filters because the sensor is
sensitive to infrared, and if the filter wasn't there, the sensor would
produce false colors.

the leica m8 omitted the infrared cut filter and it was criticized for
magenta tinted blacks. they are now providing filters to be used on
the front of the lens.

fuji just released a camera expressly for infrared and ultraviolet work
- the fuji uv/ir. unfortunately, it is not that cheap.

nevertheless, it is still possible to shoot infrared even with the ir
cut filter that's built in - it just requires much longer exposures
(typically an additional 6-8 stops, possibly even more, depending on
the camera). you'll need an infrared pass filter (which cuts out
visible light), such as the hoya r72.

it is also possible to remove the ir cut filter for infrared work,
bringing the longer exposures to something more normal. one company
that does is:
http://www.lifepixel.com/

additional info:
http://www.naturfotograf.com/irstart.html

Aad wrote:
"D.M. Procida" schreef in
bericht
...
Do all digital cameras have infra-red filters in front of the sensors?
Or to ask it another way, what sort of infra-red photography can you do
with a digital camera?

Daniele

Look for a Canon 20Da. (dslr)

The Canon 20Da is not an IR camera, they (Canon) modified a 20D to pass
H-Alpha wavelengths. Canon’s specifications indicate that the new filter
passes 2.5x more light at the H-alpha emission (656nm) than their
original EOS 20D. IR starts at over 700nm.

You can buy an IR filter to put on the front of your camera. Note
that they're dark and that you'll have to frame up your shots ahead of
time because you won't be able to see once you put on the filter.
Also, exposures will be long even in daylight.

Option 2 is what another poster said, which is to modify the sensor
such that it receives IR light. You'll be able to shoot normally,
being able to look through the lens. All shots will be IR, though.
There's no "switch" or anything to turn it off once modified. You
might want to buy a cheap, used camera for doing something like that.

Kevin



On Mar 23, 6:51 am, (D.M.
Procida) wrote:
Do all digital cameras have infra-red filters in front of the sensors?
Or to ask it another way, what sort of infra-red photography can you do
with a digital camera?

Daniele

"k-man" wrote in message
oups.com...
Option 2 is what another poster said, which is to modify the sensor
such that it receives IR light. You'll be able to shoot normally,
being able to look through the lens. All shots will be IR, though.
There's no "switch" or anything to turn it off once modified. You
might want to buy a cheap, used camera for doing something like that.

But cant you then get a lens mounted infa red filter to use when taking
normal shots?

Go look at my digital IR section on my main site and see what can be
done with both unconverted and converted digital cameras:
http://www.dimagemaker.com/specials/.../digitalir.php

Cheers,

Wayne


D.M. Procida wrote:
Do all digital cameras have infra-red filters in front of the sensors?
Or to ask it another way, what sort of infra-red photography can you do
with a digital camera?

Daniele

--
Wayne J. Cosshall
Publisher, The Digital ImageMaker, http://www.dimagemaker.com/
Blog http://www.digitalimagemakerworld.com/
Publisher, Experimental Digital Photography
http://www.experimentaldigitalphotography.com
Personal art site http://www.cosshall.com/

"Aad" schreef in bericht
ll.nl...

"D.M. Procida" schreef in
bericht
...
Do all digital cameras have infra-red filters in front of the sensors?
Or to ask it another way, what sort of infra-red photography can you do
with a digital camera?

Daniele

Look for a Canon 20Da. (dslr)
Or a Sony with Nightshot (compact)
Good luck
Here are some examples of the Sony F717.
You can get them real cheap now. Buy the necc. filters and youre ready to
go.
http://photo.net/bboard/q-and-a-fetch-msg?msg_id=00HP3W

Yes. Though, you might have to do a custom white balance if the
filter doesn't exactly match, color-wise, the filter removed from the
sensor.

Kevin


On Mar 23, 4:58 pm, "Gazz" wrote:
"k-man" wrote in message

oups.com...

Option 2 is what another poster said, which is to modify the sensor
such that it receives IR light. You'll be able to shoot normally,
being able to look through the lens. All shots will be IR, though.
There's no "switch" or anything to turn it off once modified. You
might want to buy a cheap, used camera for doing something like that.

But cant you then get a lens mounted infa red filter to use when taking
normal shots?

D.M. Procida wrote:
Do all digital cameras have infra-red filters in front of the sensors?
Or to ask it another way, what sort of infra-red photography can you do
with a digital camera?

Daniele
The Pentax *istD ia a good infrared camera with the dark red filter. I
know the Pentax *istDL also does infrared and I would expect the *istDS
and K100, K110 series would also do infrared. The K10D does not probably
due to the antidust coating on the sensor.
David McKeand