![]() Prior to a mission-critical project, be sure to first experiment with a variety of lenses in advance. Lenses which worked well with visible light may perform poorly with infrared light, and vice versa. ![]() Internal reflections, flare, aberrations and other optical artifacts are therefore more common when capturing infrared light. Most lenses are designed for optimal performance with visible light. Red color filters are slightly more transparent to shorter wavelength NIR (700 to 800 nm) than are green and blue color filters. However, this does not necessarily mean that the color isn't physically meaningful. Since infrared light is beyond our visual capabilities, any corresponding coloration is technically false color. With clothing, red pigments will often become brighter than white pigments were with visible light. With studio work, the skin on models will appear smoother and ghostly white, but veins might also appear darker and more pronounced if they're close to the surface. The overall effect helps manage contrast in otherwise harsh midday light, similar to how using a red filter enhances contrast with monochrome imagery. Smooth water surfaces also become darker, but this is primarily because they are reflecting a darker sky. In general, foliage, clouds and skin reflect more NIR and appear lighter, whereas clear blue skies and most tree trunks appear darker. Example with Dark Water, Bright Foliage and Well-Defined Clouds
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |