What are the flash metering modes available?
The α700 uses three metering modes; ADI (Advanced Distance Integration) flash metering, Preflash-TTL metering, and Manual flash. The ADI flash metering mode combines distance information from the autofocusing system with information from a pre-flash exposure. On the other hand, in Preflash -TTL metering mode, the exposure is calculated with a pre-flash only. With Manual flash, you can fire a flash with a certain amount of light volume regardless of the brightness of your subject. The available amounts of light are 1/1, 1/2, 1/4, 1/8, and 1/16. Note: Pre-flash TTL metering must be used when a diffuser is attached to an external flash or a filter to the lens. Attachment of those accessories may cause error in distance information necessary for ADI (Advanced Distance Integration) metering due to reduced entering light.
