Hi,
I would agree that Synn has a point on leaf shutters having an advantage over focal plane shutters. On the other hand, there is no need to overdramatize those differences.
To begin with, modern focal plane shutters can have pretty short sync speeds. My A99 SLT has 1/300 and the Nikon D800 is a bit faster. That difference between 1/300 and 1/800 the Hasselblad offers is not a world of difference.
If we look at stopping motion, A DSLR doesn't need the help of electronic flash in stopping motion 1/4000 s is going to that just, fine. If you need fill flash, it would preferably one to two stops below nominal,
if you want a natural look. High speed sync is wasting a lot of power, but little light would be needed anyway.
There is a trend in some branches of photography to overpower the sun. In that case you want maximum throughput from the flash. Here a central shutter is clearly of advantage, or you can opt for a flash with long duration, they can go up to something like 1/600 s.
I take a liberty to link an image, which both stops motion and has significant fill light. According to the photographer,
Hans van Eisden, exposure was 1/3200s at f/1.4. The model's name is Bibi Schouten. Personally, I would suggest that this image would be better with fill light reduced 1-2 stops, but that is just taste and should not be subject to discussion.
So, yes Synn has a good point, at least in theory. Now, good theories hold value also in practice, but that practice may be a very narrow niche.
Best regards
Erik
Ps. In my view, it is quite OK to link to a published image. After all, the image is published with the intention to be shown and the photographer has been clearly attributed.
This photographer has gained my attention as he published a link to
this article here on lula:
https://www.hansvaneijsden.com/colorchecker-perfect-skin-colors/ .
I don't think you understand how short a flash pulse is.
It is anywhere between 1/5000 - 1/13000, depending on the power, the brand etc. Some brands have even shorter flash pulses. When you sync with a leaf shutter, you are given the possibility to have a very short exposure for the subject and a much longer one for the background. You can have a frozen subject and a decently exposed background. When you do HSS, you have one exposure for both. If you manage to freeze the subject, you are left with a pitch black background, which defeats the purpose of shooting outdoors.
Anyway, I am not here to teach you the basics of flash photography. As any professional who uses leaf shutter sync for his or her work and they will say the same thing to you. If it doesn't affect your work, good for you. But it does for a lot of people, who do this seriously and no, this is not a rare case to us. Our choice of gear is actually dependent on scenarios like these. This is why leaf shutter technology still had a market.
Not gonna prolong this discussion anymore as it is not relevant to the thread subject. I will just sign off saying that if I wanted stitching advice, I would ask you but flash photography is really not something where I would turn to you for expert advice.