Thermal Vision Lenses
When you mention the phrase “night vision” it conjures up images of military raids or hotel heiresses eating powdered treats. Well, we should put those days behind us and focus on the high quality imagery new lenses are able to capture with incredibly low amounts of lights. Light sensitive digital cameras can now open a world of images not yet before seen to the human eye.
Celluloid film has a magnificent resolution but under low lighting conditions suffers from suffers from tiny particles of silver halide that creans the “grainy” effect. This results in a finished product that in almost no way resembles the actual actions taking place and puts the quality to a dismal resolution. Infra-red lenses were an advancement for a time but filmed light-waves that were outside the scope of human vision. This is a nice thing for weather patterns but not for seeing what is happening in the dark. Once filtered through reflective lenses this advancement did eventually create a monochromatic image that was much clearly and less grainy but still not in full color. Then thermal cameras came about and took the infra-red a step further by capturing emitted light from the subjects. Since these wavelengths travel at different frequencies they displayed various forms of colors. Still not always the natural ones the objects exists in but enough to distinguish what is going on.
However technology has advanced and thermal cameras can actuate real images into the perceived colors. One of the new cameras that capture this is the Sony A7s which retails for under $3,000 and also captures remarkable 4k footage. The way the camera does this is oddly by having a lower pixel rate allowing each pixel to absorb more light and lower noise reduction for a clearer image. The Sony A7s is a handheld camera with interchangeable lenses and perfect for various operations from attaching to drone or concealing in an waterproof case for a range of filming options.
These types of cameras have evolved immaculately over the last few years and the perceivable future will develop ways of filming we can only dream of. The best part is this technology once only available to the military is in the palm of any consumer’s hand.