What is an R72 filter?
The HOYA R72 Infrared filter is specifically designed for infrared photography with digital cameras and infrared film. Infrared light starts in the high-red area of the visible spectrum at around 750nm and goes up beyond 1000nm. This light is not visible to the naked eye.
How many stops is an infrared filter?
Light loss when using an infrared filter on a regular camera The 720 filter can have a 10 stop or more light loss, and will often require long exposures and a tripod. The 850 filter is even darker, and can be a 15 or more stop difference.
Do infrared camera filters work?
The effect works particularly well on bright, sunny days in summer, when there are plenty of photosynthesizing leaves on the trees. Most digital cameras have an infrared blocker that’s great for regular photography, but obviously not for infrared work.
What does infrared film do?
Color Infrared film captures invisible infrared light from the red end of the spectrum, light that’s not visible to the naked eye and characteristically turning green vegetation a bright red. Shooting analog infrared use to be complicated and expensive, results unpredictable and not making it worth the trouble.
How many stops is R72 filter?
Based on the shared experience of other photographers, the Hoya R72 filter has an estimated filter factor of +5 stops, meaning that the exposure must be increased by five stops (in this case, by prolonging the shutter speed) to obtain a nominal exposure.
How does IR photography work?
Infrared film works by being formulated to record infrared light particles. The catch is that these films are also receptive to light from the visible spectrum as well. To solve this problem and in turn make photos using infrared film, you will need an infrared filter for your lens.
What does an infrared lens do?
Infrared photography uses infrared light to expose photos, a form of electromagnetic radiation that lies below the visible spectrum. Humans cannot see infrared light, but camera sensors can, and this IR sensitivity can be used to create images.
What does infrared filter do?
An Infrared filter is the key. These filters are specifically designed to block visible light and only allow infrared light to pass through into the lens and camera.
