Infra red filter?

Mannesty
Posted 12/02/2009 - 10:10 Link
I've learned a bit more about IR conversion since my last post here. The cameras filter can be replaced by an R72 (IR) filter so that you can use the viewfinder/metering normally, but only IR light reaches the sensor. It is also necessary to move the sensor rearwards during this conversion to cater for the different focus point of IR light.
Peter E Smith - flickr Photostream
Mannesty
Posted 12/02/2009 - 10:11 Link
GrahamNR17 wrote:
That Company in Norfolk is near here. I can check them out for you if you're considering using them. Alternatively just do that remote control test and see if you'll get the results you're after
You could ask them for a discount. £250 seems a lot of money to me.
Peter E Smith - flickr Photostream
Edited by Mannesty: 12/02/2009 - 10:12
Nimitz
Posted 12/02/2009 - 13:56 Link
A few months back I had the idea to take some shots with my K10D and a IR filter from my P-system.

As you probably guessed - it never worked out very well

The K10D sure seems to block all IR light.
Edited by Nimitz: 12/02/2009 - 13:56
johnriley
Posted 12/02/2009 - 14:08 Link
The *istDS worked well enough for IR, but the K10D has a much stronger filter and is not good for the purpose.
Best regards, John
bigcog
Posted 12/02/2009 - 17:54 Link
i think its possible with patience, I found this one on flickr, 5 minutes exposure. I really like it, probably a rock solid tripod used too. As far as i can tell this was taken in a K10d not modified.

IR pic of Falkirk wheel
K10D - Pentax 18-55mm kit - Pentax DA 55-300mm - Pentax FA 50mm 1.4
MX - Pentax-M 50mm 1.7, Pentax-M 28mm 2.8, Pentax-M 100mm 2.8
My Flickr Photostream
womble
Posted 12/02/2009 - 21:52 Link
The alternative to moving the sensor is to use an old manual lens which has a small red mark on the focusing barrel which is the offset for using IR. It appears on Super Takumar, Takumar, M and A series lenses. I don't have any F/FA/FAJ lenses to check...

Best wishes, Kris.
Kris Lockyear
It is an illusion that photos are made with the camera… they are made with the eye, heart and head. Henri Cartier-Bresson
Lots of film bodies, a couple of digital ones, too many lenses (mainly older glass) and a Horseman LE 5x4.
Nimitz
Posted 13/02/2009 - 07:37 Link
bigcog wrote:
i think its possible with patience, I found this one on flickr, 5 minutes exposure. I really like it, probably a rock solid tripod used too. As far as i can tell this was taken in a K10d not modified.

IR pic of Falkirk wheel
Stunning shot.

5 Mins exposure - sure is a long time. Very creative image though.
bigcog
Posted 13/02/2009 - 11:06 Link
i thought so, its one of my flickr favourites.
K10D - Pentax 18-55mm kit - Pentax DA 55-300mm - Pentax FA 50mm 1.4
MX - Pentax-M 50mm 1.7, Pentax-M 28mm 2.8, Pentax-M 100mm 2.8
My Flickr Photostream

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