flash - What does TTL mean? - Photography Stack Exchange
When speaking of a flash, a TTL flash is one that can understand the signalling protocol used to perform TTL When talking about flash radio triggers, the TTL/manual feature distinction is similar.
TTL-FP: Focal Plane flash: permits flash photography with a shutter speed faster than the camera sync speed, which is typically 1/250 sec or 1/200 sec on Nikon DSLRs. In the * TTL-FP mode: the flash...
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