Join ePHOTOzine, the friendliest photography community.
Upload photos, chat with photographers, win prizes and much more for free!
Darkroom technique used to darken selected areas of a print. Several image-editing programs also include a similar tool to darken pixels.
Get the new ON1 Photo 10 and Save $100 Today. Use Code: GetPhoto10 View Offer
Indicates the energy content of the storage capacitors in an electronic flash. One Joule is the light output given by one watt burning for a second. Therefore a flash unit with a storage capacity of 300 Joules can supply the power to light a 300W lamp for one second. It doesn't take into account any electrical loss between the flash capacitor or flash tube, or the efficiency of tube and reflector.