What is the best slide projector? Slide projectors have been around for well over a century, providing the opportunity to take images and display them on a bigger screen for clearer viewing.

Film photography is as popular right now as it has been in years, which has made slide viewers relevant once again. Slide film (sometimes known as reversal film) creates positive images directly on ...

From the bare bulb or out the lens? Out the lens, practically none. Most glass attenuates UV very well. Same for a fluorescent lamp. You need special glass to pass significant amounts of UV.