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Perils of Infrared Photography

Started Jun 24, 2016 | Discussions thread
Elemental Photography Senior Member • Posts: 1,094
Colour IR is easiest with a converted camera.

Big Ga wrote:

Vorchek wrote:

I'm not accomplishing a great deal with IR. An unconverted camera, mated to a Hoyer R72 filter,

Are you sure the cutoff frequency of this filter isn't too high to allow false colour?

Isn't the 72 for 720nm cutoff?

I thought the false colour cameras had a filter somewhere in the 6xx nm region.

This is off the top of my head though so I may be mistaken.

This is correct; a 720nm filter doesn't give much latitude for false colour infrared.  It would be very difficult to do false colour infrared with a stock camera- I do mine with a full-spectrum conversion and various filters for the lenses.

This is from a B+W 091 filter, which I believe corresponds to about 630nm.  It's also been processed heavily through Lightroom and Photoshop.  The 2000ºK limit on raw file conversions in ACR does need a few creative workarounds but I mainly use Photoshop layers to accomplish that.

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