در مورد سينک با سرعت بالاتر از معمول، براي دوربين هايي با شاترهاي معمولي Focal Plane - FP تکنولوژي به کار رفته در فلاشهاي پيشرفته به اين صورت است:
ظاهراً با اين تکنولوژي، يعني تکرار رگباري فلاش در محدوده زمان نوردهي براي پر کردن مناطقي که توسط شاتر پوشيده شده، با SB-800 - همان طور که داريوش و رضا عزيز گفتند - ميتوان تا 1/8000 ثانيه با فلاش عکاسي کرد، توضيح بيشتر:کد:http://www.photozone.de/3Technology/flashtec5.htm
(البته اين مسئله اصلاً جديد نيست و اصولاً با خيلي از فلاشهاي قديميتر نيکون، کانون و مينولتا قابل انجام بوده است)
Auto FP High-Speed Sync
The D2H's standard top flash sync is limited to 1/250, but with this mode enabled on the SB-800 the camera will automatically switch to Auto FP High-Speed Sync when necessary to allow for synchronization at shutter speeds above 1/250. It provides illumination across the frame above 1/250 by emitting a series of lower-power flash bursts during the exposure, timed to carefully coincide with the shutter's opening and closing. Auto FP High-Speed Sync works right up to the D2H's top shutter speed of 1/8000, though the flash range drops as the shutter speed moves above 1/250 (as it does with the focal plane sync modes of competing camera systems).
Focal plane (FP) flash isn't entirely new to Nikon Speedlights; previous models, including the SB-28DX and SB-80DX, also offer high-speed flash synching capability with current Nikon digital SLR cameras. The key difference is that the SB-800's FP mode is full TTL, or i-TTL to be precise, which is a big step up from the clunky, nearly-manual operation of the FP mode of Nikon Speedlights prior to the SB-800.
In other words, shooting with the SB-800 set to i-TTL at shutter speeds above 1/250 should be seamless and fully automatic with the D2H. This will almost certainly be an indispensable feature for photographers who make pictures outdoors, both to enable action-stopping shutter speeds with flash fill and to allow for the use of larger apertures for more pleasing bright ambient light portraits.
مرجع:
کد:http://www.robgalbraith.com/bins/content_page.asp?cid=7-6269-6292