Why settle for ordinary when you can explore the extraordinary with the Hoya R72 Infrared Filter Specifically engineered for infrared photography, this 58mm R-72 filter is compatible with both digital cameras and infrared film, making it a versatile addition to your photography toolkit. Infrared light, which begins in the high-red area of the visible spectrum at around 750nm and extends beyond 1000nm, is not visible to the naked eye. However, with the Hoya R72 filter, you can capture this invisible spectrum, opening up a world of creative possibilities. When you look through the R72 filter, it appears almost opaque. This is because it's designed to pass only light from the very high red edge of the visible spectrum and infrared light. This unique feature allows you to capture images that reflect infrared light differently than normal light, resulting in intriguing and sometimes stunning photographic results. It's important to note that due to the nature of infrared light, the filter factor and exposure compensation can vary significantly from visible light and largely depend on lighting conditions. Despite this, users have found that with a bit of practice and adjustment, they can achieve the desired effect, even in bright sunlight. Moreover, this filter offers the added benefit of being able to compose your shot through the viewfinder after a few seconds of eye adjustment. This makes it a practical and valuable tool for photographers looking to experiment with infrared photography. In summary, the Hoya R72 Infrared Filter is not just a lens accessory, it's a gateway to a new dimension of photography, allowing you to explore and capture the unseen world of infrared light..