What are these used for? For B&W film photography: The "purple" actually blueish corrects daylight balanced film so that it can operate under tungsten illumination The "pink" actually salmon converts tungsten balanced film allowing it to operate under daylight conditions. Google photographic filters to learn about their use. If “D” Daylight film was loaded and the scene was tungsten lit, the results were too ruddy, we mounted a bluish correction filter. The results would be too blue, so we mounted a salmon correction filter. We would have type “A” tungsten loaded and we worked a daylight scene. Often the camera was loaded with the wrong color film. Since there are several types of tungsten lamps, there was a type “A”. “T” type for applications shooting under tungsten lamps. In the heyday of color film, it was manufactured for a variety of applications. Color films are fabricated for specific types of lighting. With the introduction of the first practical color film, Kodachrome 1935, filters found other applications. There are many more filter applications with black and white film. A deep red gives night for day, movies with nigh scenes was shot with red filter and under-exposed to give an illusion of nighttime. The yellow filter did this but with more finesse. In other words, the intensities of how black or gray objects should reproduce was greatly improved by carful selection of colored filtersĪ red filter was used to artificially enhance the contrast of clouds against a blue sky. It delivered correct monochromatic rendering of colored subjected when using black & white film. We carried a gadget bag filled with filters that corrected for the inaccuracies of film. The result is a haze cutting effect when a UV is mounted. A UV filter reduces the level of ultraviolet light that reaches the film. In photography, distinct vistas likely mountains and views from high-altitude airplanes reproduce as haze. Because of their size, they tend to scatter mainly ultraviolet and blue light. By the 1950’s, black and white film gained red sensitivity and things truly got better (not perfect).Įarth’s atmosphere often contains an excess of moisture droplets. By the 1940’s black & white film has gained green sensitivity and things improved. Blue sky recorded too light likely white. Cheeks and lips reflecting ruddy light and void of blue, reproduced too dark, even black void of detail. The resulting images sometime came out quire weird. In the early days of black & white photography, films only recorded ultraviolet, violet, and blue light. Different films respond to light in different ways. Again, digital handle these hue errors quite well whereas film cameras require careful selection of film type and the mounting of color modifying optical filters.įilm photography can be greatly enhanced using optical filters. Pictures taken indoors under artificial light tend to be off-color based on the type of lighting (fluorescent too greenish) (tungsten too salmon) etc. In other words, pictures taken in daylight with a vast amount of blue sky, tend to come out blueish. Shoot with the sun at your back to ensure the scene is well-lit.Modern digital (electronic) cameras are able to self-adjust “color balance”, (optimize) the overall color of the resulting picture. You can avoid this by reviewing your footage and adjusting your scene as necessary. There are certain situations where red filters may produce extra red tint or muted colors. GoPro flip adapter kits attach to the lens port and allow you to flip one or two filters up or down if you want to switch between filters and video lights on the same dive. Depending upon the housing and camera type, filters may fit on the lens port, screw onto the lens inside the housing, or flip with a lever in front of the lens inside the housing. Red filters are the standard for underwater use, but filters for snorkeling and green water exist too. A red filter will change the color temperature measured by the camera, helping it choose a more accurate white balance underwater. Cameras constantly measure the color temperature (warmth) of the scene and calculate the white balance needed. Light is lost as you descend in the water column as a result, your eyes see everything with a blue or green tint. Color filters are a useful option for underwater photographers who want to record accurate color at depth, especially when using smartphone housings or action cameras.
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