Introduction to Digital Infrared Photography: Camera Modification Filters, White Balance, and False Color Processing
Based on Nikon's infrared photography topics and Kolari Vision's modification usage recommendations, explain digital infrared camera modifications and filter selection, custom white balance targets, the false color processing workflow of individual photographers, and DSLR inspection items; do not provide sensor disassembly tutorials or generalized color/reflectance laws.
Basic Choices for Digital Infrared Conversion Cameras and Filters
A Nikon infrared photography feature explains that conventional digital cameras have internal filters that block infrared; infrared-converted cameras replace these with filters that allow longer wavelengths to pass through. The feature uses >830nm as an example of monochrome infrared and explains that false color filters allow visible light and infrared to contribute to the image in different proportions; the more visible light the filter allows, the stronger the false color effect may be. Specific filter performance should be based on the product transmission range and actual shooting, and this article does not provide teardown instructions.〔G-IR-01〕〔G-IR-02〕
Choosing White Balance Targets by Filter Band
Kolari Vision recommends using green grass or foliage to measure custom white balance for filters of 720nm and above; for 590nm and 665nm filters, use a gray card or white paper, and measure on-site whenever possible. This recommendation comes from a conversion service provider, and whether it can be set in-camera and the menu steps should be confirmed according to the camera model manual.〔G-IR-03〕
Treating False Color Processing as a Post-Production Option
In the Nikon feature, photographer Chris Baker explains that he can set custom white balance in-camera or during post-production; his personal Photoshop workflow swaps the red and blue channels and further adjusts other color channels to change the foliage color. This is an example of a personal workflow and is not a step that must be performed for all infrared photos.〔G-IR-04〕
Pre-Shooting Checks for DSLR Metering and Lenses
Kolari recommends that DSLR users test exposure, as cameras meter based on visible light, which may be inaccurate with certain lighting and filter combinations; they also suggest checking each lens for focus shift and calibrating lens micro-adjustment if supported by the camera body. This check recommendation is only for DSLR workflows; other camera models should follow their design and manuals.〔G-IR-05〕
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