K10D - Infrared performance?

Has any of you lucky K10D owners tried any Infrared pics yet, and is it at least as good as the *istD?

Cheers,

Given the cloudy skies here, very few photons in the near infra-red have reached the ground, letalone the sensor on my K10D! I did see somewhere a photo taken in the IR with a K10D, I'll try and dig up the link.

EDIT
here's the link http://www.photo.net/bboard/q-and-a-fetch-msg?msg_id=00JKfj

I wasn't aware that either camera was capable if IR pics, is there a specific mode or trick with the camera, or are we just talking about adjusting images in photoshop.

Hi,

I just found this..

Hope that helps,

Cheers

Liam

It's NIR or Near-Infra Red. This is the "visible" IR range not the thermal IR range we see in night vision equipment. The most popular NIR filter is the Hoya R72. Install this on your lens and you'll lose about 6-11 stops, so expect to use a tripod.

The sensors in digital cameras are sensitive to IR 'light', but will have some degree of filtering applied to reduce the visible effect of this on the finished image. However, if you use an IR72 filter on your lens (Cokin do one, as do Kood I think), you filter out the visible light and just leave the IR.

It's the same as using IR film, but the exposures tend to be longer as the sensor is less sensitive to it.

You end up with a image in varying shades of red, which you can the convert to greyscale in photoshop.

There was a thread on here about it before, early springtime, I think.

Dan

I have had good IR results from the *istD which is why I asked the question.

You do need to compose and focus the shot before fitting the IR filter because the human eye (and the cameras focussing mechanism) can see nothing through it. You'll just about see the sun (but you may have to wait until June for that in UK ) through it, but not much else.

I suppose, seeing as I posted the above test I ought to have a go, just for the hell of it as much as anything..

IR TV remote waved around in front of lens a bit, on tripod, in loo with light off. Highly technical laboratory test situation, as always..





*ist DL | 18-55 @ 55mm | ISO 800 | 8s @ f22

Does this make my bathroom an "Infra Red Light District".. ooer.

Oh, and I went and bought an R72 (cokin A) off ebay after seeing the images in the link above..

Cheers

Liam

Some manufacturers, Canon particularly, filter out IR light very aggressively. My *istDS does respond quite well to using a Hoya R72 filter.

The filter is opaque so it is necessary to focus first and then fit the filter, although you can point the camera and guess! Don't forget to alter the focus point to get the IR light focused correctly. Some prime lenses have an IR mark on the focusing ring to help with this.

If you want to emulate the appearance of film IR then grain and a diffuse glow can be added in Photoshop.

Last year I managed this (with a lot of help from MattM in post-processing!

that should be Lavatory test situation, surely?

any chance of getting anything like IR with a normal red (B&W) filter? or would I be wasting my time.

BTW Very nice shot Tim

Yes, definitely. You can use a red filter with IR film if you wish, or you can use one with digital However, you can more easily use Photoshops's Channel Mixer to emulate the IR effect.

Increase red and green dramatically and reduce blue dramatically. Adjust to taste!

stupid question, does the metering work at all with one of these filters on, do you meter without the filter and boost the exposure X stops, or do you just take a stab in the dark and adjust as apropriate from test shots? I've always been a bit tempted to try some IR, if the K10 is good for it perhaps I'll look out for a filter.