Originally posted by Digitalis yes they are not directly comparable because they are mechanically quite different. I don't think I was clear on my point. If a shutter has a synch speed of 1/250th that is it. No flash can alter that fundamental fact,so the idea of new flashes suddenly enabling a photographer to use 1/250th Without HSS as a full synch speed is suspect.
I own several compur lenses that I use for Large format photography. I don't need that explained.
I call BS on that. Synch speed is dependant on the Shutter mechanism, not on the flash unit. Unless the user has activated High speed synch. The 1DMKIV which synchs at 1/300th is the fastest natively supported synch speed possible with canon speed lights.
This, I could not know, apologize me if I offended you.
I have quite an extended LF equipment too, mainly Linhof, that I use on my studio flash generators. These Multiblitz generators are rather 'slow', that is flash duration, and this would not change with altering shutter speed. Indeed, flash synchronization is all in the shutter. However, I have a few Multiblitz Variolite 1000 mono-blocks that are specially build to have a rather short, or should I say high —, flash duration. Again, this duration, thus 'speed', has nothing to do with the shutter. Shutter speed can be faster than flash duration and vice versa…