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Tag Archives: p-ttl
I talk about camera flash communication methods (TTL vs E-TTL i-TTL p-TTL) as well as thyristor sensor based auto mode. Here is the Youtube video: Diagram for TTL and pre-flash based TTL methods: Standard TTL: This was the original method of flash power control. It happens as the film/sensor is being exposed to light. There is a dedicated sensor near the film that monitors the reflected light off of the … Continue reading