 | December 01, 2011 Breaking news from America's top photo magazines |   | |  | Dedicated Combat Camera units photograph operation on the ground, at sea and in air--even in battle. We joined them for two days of training "We need to beware of mountain lions," U.S. Navy Chief Mass Communication Specialist David Rush tells me as we wait for his sailors to arrive. Up to now, on this cold, cloudless February evening deep in the Angeles National Forest, my main concern has been simply not getting shot during a live-fire exercise. But now I had another something lethal to gnaw my nerves. READ MORE >> |
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 Be the first to hear about new stuff on PopPhoto.com by subscribing to our revamped RSS feed! | | | TECH SUPPORT Adjusting aperture affects both ambient and flash exposure
As the aperture is the lens's light valve, opening it up or stopping it down will lighten or darken both exposures—provided the flash output is kept at the same level. (With the flash set to auto, it will compensate by increasing or reducing the output—more on this later.) Since a large aperture admits a lot of light, the flash can emit less for proper exposure. This will give you greater flash reach and/or longer battery life. A small aperture requires more light, and your reach and/or battery will suffer accordingly. With a TTL- dedicated flash system, the camera's meter will automatically produce the correct exposure for the flash-lit foreground subject. To determine what shutter speed to set for the background, meter it and set the shutter about about a stop faster. With brightly lit backgrounds or animated subjects, watch out for ghosting. |
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