Infra Red Filters.

[JeffCohen]

according to how i was told ,the best way is to mount your camera on a tripod, focus without the filter on ,lock focus if possible THEN screw on filter and expose .interesting notes about the nikons ,as iv'e just aquired a d90 i can't give a answer yet but i may well have a play later today and see what happens .

[hssutton]

To avoid noise and excessively long exposures you really need to get a camera converted.

Ihad my Canon 10D converted at http://www.advancedcameraservices.co.uk/html/ir.html at a cost of approx £250.

Here's a couple of examples.

Harry

[TommoR]

What Cracking shots. I love the Tree, how did you process that?

[hssutton]

Hi Tom and thanks for the comments.

The first stage is to create a custom white balance for both photos I used grass under sunlight to set the white balance.

Second stage is to take photos as normal. The Cuba photo was taken at 100th sec @ f/14, 100 ISO.

Before processing the images are red/magenta, to convert them to false colour IR. it's neccesary to swap over the red and blue channel setting. i.e the red would be 100 and the blue at 0, so you just reverse these numbers and then do the same for the blue channel.

Here's two more examples.

Harry

[Robster]

Love the Palm trees FANTASTIC.
I have been offerd a EOS10D very cheep recon it will be worth buying to convert.
My Infra Red filter came today so have had a quick go and in colour pictures just red as expected, and in black and white just look black and white, its the white grass and trees that I am after!
Look out Harry I may well be your new best friend.

[EdwinM]

I had an article about infrared in the old forum which tackled many questions unfortunately it was not exported to the new forum.

To answer some questions that I see here;

1. Live View - for the 5d mk2 at iso 6400 in broad daylight one can see the the image but the custom white balance will not work and red cast will be seen.

2. Custom white balance - very critical, it has been proven that you have to get the right CWB first to get a good "range" of RGB for false color. If you shoot AWB, the red channel clips easily and the blue and green channel wont have that information. Getting the white balance before the shot is important and not after the shot where you let processing software do the white balance.

3. Green foliage is best to be used for CWB. Not all camera can have false color immediately off the cam-in the lcd especially nikon models such as d90, d300, d40. But I was able to get a custom nef file to be used as CWB and for the d90 and d300, one can achieve false color off cam.


Some of my photos using a hoya r72 filter







And this one taken by a converted camera using a 590nm pitch...








and this one is the d90 shot using a custom nef file for cwb. Normally even if you shoot a green foliage and set to preset the photo will turn yellowish or reddish. This custom nef file make sit possible to attain false color in cam-off the lcd, the rgb levels are also healthier thus more false color can be attained.





hth.

[Robster]

Great Pictures

The onlyInfra Red article on the site I have found is on getting infra red effects with Photoshop, its good though

[hssutton]

Robster

I'm about to place my IR converted 10D plus two batteries and grip on ebay £300. the cost of conversion is approx £250.

I'm not sure what the turn around period is for a conversion at the moment, but when a friend of mine had his D200 converted in the summer it took over 2 months.

I'm about to send my Canon 5D to be converted. Ready for the green, green grass and leaves of spring, hopefully with some blue skies amd fluffy white clouds.

Harry