Originally posted by Theov39 How does the sun damage a camera or lens?
is a SOLAR filter just a very dark ND filter?
The sun primarily damages lenses and cameras through the high intensity of it's light (both visible and infrared) which like a magnifying glass will burn aperture irises, mirror box plastic, shutter blades, and even the sensor itself.
There's actually three classes of filters:
1) A standard ND filter attenuates visible light but is not guaranteed to attenuate either IR or UV which means there's a risk of camera or eye damage from using it.
2) A photography-specific solar filter (sold for photography and telescopes with cameras instead of eyepieces) attenuates both visible and IR light to avoid thermal damage but is not guaranteed to attenuate enough UV to avoid the risk of eye damage from using it.
3) An eye-safe solar filter (sold for use on telescopes and cameras) attenuates visible, IR, and UV light to avoid both thermal and UV eye damage.