D-TTLDigital through the Lens (also seen as DTTL; Nikon cameras)
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A top shutter speed of 1/4000 second, a high-performance built-in speedlight with D-TTL flash control and a flash sync speed of up to 1/180 second offer convenience with impressive results.
D-TTL Exposure Metering System: The FinePix S3 Pro offers
Intelligent Flash with the D-TTL full-aperture exposure