PentaxLife Tag: infrared

ammonyte on "K10 D and infrared"

ammonyte — Mon, 10 Sep 2007 21:54:43 +0000

The K10D isn't as sensitive to IR as it's predecessors. The 72 in Hoya R72 refers to the wavelength (720 nanometers) which (I think) is the 50% cutoff. More details about IR photgraphy are here http://www.dpfwiw.com/ir.htm and here http://www.jr-worldwi.de/photo/index.html?ir_comparisons.html

thepentaxhammer on "K10 D and infrared"

thepentaxhammer — Mon, 10 Sep 2007 18:12:49 +0000

Thanks for the reply, but I doubt the folks at ebay would be able to figure out what type of an infrared filter would work best on a Pentax K10D. That's why I've been trying to find answers at forums such as this, with members like you guys that have experience with photography, and in particular... this camera.

Once I can find what type of filter would be best, then maybe I can find on to purchase at ebay.

Vitali on "K10 D and infrared"

Vitali — Sat, 08 Sep 2007 07:30:04 +0000

Try to search at eBay. May be there you'll find more options.

thepentaxhammer on "K10 D and infrared"

thepentaxhammer — Fri, 07 Sep 2007 17:09:53 +0000

I've been taking infrared photos with my K10D and a Hoya R72 filter. While I can take photos this way what I would like is to be able to take shorter exposures. My normal exposure time is 8 seconds with the aperture wide open, and ISO at 200 - 400. If I go for higher ISO speeds, then I get way too much grain.

What I would like is to find a different infrared filter that isn't as dark as the Hoya R72. The local camera store (a real camera store, not a Best Buy type of store) just doesn't know much about infrared photography, except for with infrared film. I don't want to convert the camera to do only infrared, so that's not an option either.

Does anybody know of any other IR filters that would work with the K10D?