But you need to work in manual flash mode, which is easy on digital anyway.
The super high sync speed on D70/D40 is due to the electronic shutter (CCD shutter) used. The mechanical shutter on D70 syncs at something around 1/125 (1/90 on N70 but D70 has 1.5x crop).
A classic case that someone will need flash with high speed sync is when you need to use fill-in flash in bright environment and yet still want to use large aperture for shallow DOF. When you have large aperture in bright environment, your shutter speed have to go up for proper exposure, unless you use ND filters to keep the shutter speed within the normal sync speed.
Last edited by Scaglietti; 12th June 2007 at 11:32 AM.
found an article, which suggested setting -1.7 compensation
P-TTL works much better for closer stuff. I think manual works pretty well for far off stuff.
P-TTL also works great for fill. -1.7 comp usually does the job for natural looking fill (shooting fairly close to the subject 5-20ft).
Not sure if you gain anything, I'd gladly trade P-TTL for a higher native X sync.
When you are using flash, try shooting in M mode. Meter the scene manually, leave the flash to adjust itself via TTL (with the appropriate flash exposure compensation). You'll have more control on the overall exposure.
Say for example the ambient is metered ISO 100, F/8, 1/1000 and you would like to fill in with a full flash output - you can dial to F/5.6 1/2000 and half flash output instead. Since the capacitor is only half-discharged, the next shot will be ready sooner.
Last edited by grantyale; 12th June 2007 at 12:58 PM.
When shooting above the sync speed, the film is not exposed entirely at any instance of time, only a slit is open for light and the slit travels vertically. FP flash keeps a constant illumination for this slit to run across the film.
Last edited by grantyale; 12th June 2007 at 12:55 PM.