 Mithra M.S. Weerakone |
Digital Flash Vs. Conventional Flash Is a digital flash different to a conventional flash using digital cameras? Do both sync at the same speed or different speed? When using slaves off a digital flash to a conventional studio flash, do they sync?
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Jon Close |
It depends on the specific model of digital camera. On some point-and-shoots, the sensor is constantly recording and the "shutter" is just electronically recording the image for a set length of time. These cameras can sync with built-in or external flashes at all shutter speeds. Other point-and-shoots and all digital SLRs use conventional/mechanical focal plane shutters and can only sync up to 1/200 or 1/250 second. Even with these, the manufacturer's speedlights may incorporate a high-speed sync mode that flickers the flash and allows "sync" at all shutter speeds. With respect to TTL control of the flash output, no digitals can use older designs meant for film cameras. These relied on an in-camera sensor that read the light reflected off-the-film while the shutter was open. Digital sensors do not reflect consistently/evenly like film and cannot utilize this system. Digital TTL flash exposure relies on a low-power pre-flash that is measured by the meter before the shutter opens, after which the main flash fires when the shutter opens. Canon's system is called E-TTL, Nikon's are i-TTL and D-TTL. However, digital cameras can use the simpler non-dedicated non-TTL auto flashes, such as Vivitar 283. When using optically-triggered slaves, the pre-flash from a digital TTL speedlight will often set these off before the shutter opens.
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Mithra M.S. Weerakone |
Thanks. The flash out put from a conventional flash seems strong for a digital camera.(I use FujiS2Pro)Bounce seems to work well. I see most digital photogrphers using a soft paper bounce. The digital dedicated falshes must be compensating for this hard light illumination by giving a softer light. Am I correct?
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Jon Close |
I don't think it's specific to digital. Bounce flash or using a diffuser give the same effects on film, lessing shadows and hot spots from the flash.
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