« on: January 27, 2015, 06:56:50 PM »
[/quote]Actually the Schneider Kreuznach and Mamiya Sekor leaf shutter lenses go up to a max speed of 1/1600th sec, flash sync at all speeds of course. The Hasselblad sync up to max 1/800th and the Leica S up to 1/1000th. The blad is only leaf shutter however and the pentax only focal plane shutter.
If you have the lights that can do it, a p45+ or newer back, and are hard wired or using a Profoto Air or Skyport trigger, yes, it is possible to get 1/1600th. If you're trying to kill the sun, yes 1/1600th matters. But if you're trying to freeze motion, you're actually better to shoot with faster lights at a slower shutter speed. No LS lens, you're at the same 1/125th sync speed on the Pentax or the DF+.
There are manual focus -A LS lenses like the 135mm LS for the Pentax 645 and any Pentax 67 LS lens can be shot via adapter (full manual). Pentax has promised new LS lenses, so this issue should go away. Pentax 645Z also can do HSS with their P-TTL speedlights - so you can 'sync' at up to 1/4000th of a second.
Agreed. Good they're promising LS lenses. Will bring them up a touch to serious competitors for more people. Doesn't solve my workflow issue though. Yes shutter controls ambient, flash controls the rest and or aperture when using strobe. HSS in another consideration but I don't like it. Only works on some units anyway and or with trickery.