Originally posted by Class A 1. I did not state that one would get different images at 1/4000s, etc. compared to not using any flash.
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2. I don't regard the method of moving a slit over an imager [...] as "appropriately stopping action".
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3. For professional results, I'd therefore only consider ultra-short flash photography as an appropriate means for truly stopping action
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4. I find the emphasis on action photography to be ill-guided.
I will not reply on the home page, but we can exchange a few arguments in this thread.
(1) I did not state you would have stated so
Class A, I am sure you know your stuff and didn't mean to imply you don't.
(2 & 3) A rolling 1/320s shutter (Nikon
FP or Nikon
Focal
Plane mode) and action ...
Of course, you may theoretically obtain tilted edges for very fast action. However, in
practice this is no concern. Extremely fast moving
outdoor subjects are either panned (racing cars, jets etc.) or organic (birds, skiiers, tennis players, boxers etc.).
No professional I am aware of has ever complained about issues at 1/8000s with skewed images. Your comment looks like you point at a hypothetical problem which isn't one in a pro's daily life.
Of course, there is indeed
indoor photography which requires extremely short flash pulses, like bullet, splash, implosion etc. But that's almost always done in the studio with special trigger devices. Where hotsyncing is irrelevant anyway.
Eventually, there is no way to stop action other than using the HotSync approach if you need to overpower the sun
and need shallow depth of field
and need to stop action.
As this kind of photography must be produced by many professionals today (wedding/jumps, fashion/wind), your statement the technology wouldn't be appropriate for professional results is misleading. The opposite is true.
(4) It is not. But a reminder this to be meant in conjunction with shallow depth of field outdoor may be advisable.
Originally posted by Wired The biggest news is that this shows that a professional light company is embracing Pentax and sees where they are going and wants to be able to be a part of that pie.
That's more a professional 645Z shooter who convinced PrioLite to adapt their remote trigger to support Pentax. That's the good part with PrioLite actually: run by technicians and photographers, not marketing guys -- which is what made them go spin off of Hensel.
Originally posted by Wired I just don't know if I could justify buying into another lighting system after just outfitting myself with a Profoto system.
The Profoto B1 AirTTL with newest firmware can do the same. Although more recent, even more expensive and possibly not suporting Pentax.