21 votes
Accepted

Why are flash pulses so short?

Why? Fundamentally, it's because of the way flashes work. Flashtubes generate light by discharging a capacitor through a xenon-filled tube. The resulting electric arc produces bright white light. But ...
Caleb's user avatar
  • 31.7k
21 votes

Why are flash pulses so short?

That is a true statement, but it misses the big point. (As the shutter would see it), it would simply become continuous light, like any incandescent light bulb (always On for the full shutter ...
WayneF's user avatar
  • 12.9k
8 votes

Why are flash pulses so short?

Others have addressed the technical side of why strobe flashes are extremely fast. There are alternative photo lighting technologies which do exactly what you say. This answer addresses the pros and ...
Dan W's user avatar
  • 197
7 votes
Accepted

Will I get HSS with my Fuji camera and Godox flash gear?

Fuji HSS There's an easy way to tell if your Fuji camera does HSS. Unlike all the other camera brands supported by the Godox X system, Fuji's HSS setting is controlled by the camera, not by the ...
inkista's user avatar
  • 52.1k
7 votes

How does using an ND filter compare to using HSS for freezing subject motion in daylight?

Just to get the full understanding: Only to freeze fast moving subjects which need shorter shutter speeds than the flash's burning speed HSS is really required? Sort of. That is a common reason to ...
Michael C's user avatar
  • 175k
6 votes

Why are flash pulses so short?

If the flash were to light up before the shutter opens and turn off after the shutter closes, there would never be flash sync problems. There would also be lower efficiency as some of the light ...
Michael C's user avatar
  • 175k
6 votes
Accepted

Does shutter speed affect flash exposure in high speed sync?

Is this true also when the flash is used in High Speed sync mode? Or does in this case the shutterspeed affect the flash light too? Shutter speed has some effect with HSS, but for different reasons. ...
Caleb's user avatar
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5 votes
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What is a leaf shutter?

The general idea of a leaf shutter seems to have started from leaves on trees. The earliest leaf shutters had a relatively large, flat opaque "leaf" with a "stem" sticking out from one end where it ...
Jerry Coffin's user avatar
  • 19.3k
5 votes

What is a leaf shutter?

A leaf shutter is located in the lens of a camera, rather than in front of the focal plane inside the body of the camera. They are made of several metal blades that fit together in a circular ...
Michael C's user avatar
  • 175k
4 votes

Why are flash pulses so short?

Started out as a comment to Caleb's nice answer and accidentally turned into answer... To start a (glowing) discharge high voltage is needed (called breakdown voltage). When the vacuum is broken down ...
Crowley's user avatar
  • 1,808
4 votes
Accepted

What is Hi-Sync flash and how does it differ from HSS?

The article HS or HSS? What is the Difference? talks about the difference between High speed sync, HyperSync, and Hi-Sync, and explains the difference more clearly than I can here, so go read it. ...
Caleb's user avatar
  • 31.7k
4 votes

Why don't we have Manual flashes with High Speed Sync?

Godox has several lines of flashes (everything from speed lights to studio strobes) that are manual with HSS. The challenge is HSS requires the trigger interface with the cameras proprietary flash ...
Joel's user avatar
  • 41
4 votes
Accepted

Does the Nikon D3300 support high-speed sync speedlights?

No, the D3300 does not support high-speed sync, (none of the D3x00 or D5x00 bodies do) so you're limited to 1/200s and below shutter speeds. Anything faster, and you will have black bars on the image....
inkista's user avatar
  • 52.1k
4 votes
Accepted

Is HSS open or closed loop? Does it work in complete darkness?

You make the assumption that light drops significantly between two flashes. This isn't true: (full story at https://neilvn.com/tangents/high-speed-flash-sync/) Since doing this properly is likely ...
xenoid's user avatar
  • 21.4k
3 votes

Can I do high-speed sync with a Nikon D5500 and SB800?

The Nikon D5500 does not feature an Auto FP flash sync setting. This is the name Nikon uses for high speed sync. So although the SB800 does support AFP, your camera is not capable of using it. The ...
Michael C's user avatar
  • 175k
3 votes

Does shutter speed affect flash exposure in high speed sync?

Shutter speed does not affect regular speedlight mode exposure. The speedlight flash is faster (shorter duration) than the shutter speed, so it does not matter (to the flash) how much longer the ...
WayneF's user avatar
  • 12.9k
3 votes

Which Canon DSLRs support High Speed Sync and what other requirements are there?

All current Canon EOS DSLRs, including the 80D, support High Speed Sync (some older EOS film cameras do not). Of course you must use a flash that is HSS capable and not all Canon or third party ...
Michael C's user avatar
  • 175k
3 votes

Cannot set up external Yongnuo flashes with Canon 5D Mark II

The YN-560 series are manual only flashes, so they don't support things like TTL or High Speed Sync, which is what you need to shoot above the camera's sync speed. The 5D Mark II's flash sync speed is ...
Robin's user avatar
  • 1,582
3 votes
Accepted

What are the pros and cons of the Nissin and Godox flash systems for Fujifilm cameras?

Personally, I think it all comes down to how much you want one of the Godox bigger-than speedlight options. That's pretty much all the Godox system can give you that the Nissin Air system can't at the ...
inkista's user avatar
  • 52.1k
3 votes
Accepted

Why can't HSS mode be automatically turned on for shutter speeds faster than the max speed sync?

Is this a conscious decision that manufacturers have made not to include such feature, so that photographers can be aware of the HSS flash power limitations? In my opinion, yes, I think this is why ...
inkista's user avatar
  • 52.1k
2 votes

Any way to force HSS for Yongnuo 560 IV

No. There's no way to get HSS from a Yongnuo YN-560 IV. HSS requires camera/flash communication along the flash foot pins that the YN-560IV doesn't have (being single-pin. That pin is for the sync/...
inkista's user avatar
  • 52.1k
2 votes
Accepted

Does leaf shutter work in HSS with Any strobe?

If we have a leaf shutter lens, will we still need a strobe that Does support High Speed Sync like a Profoto B1 ... How HSS works with focal plane shutters is that the shutter curtains create a slit ...
inkista's user avatar
  • 52.1k
2 votes

Which Canon DSLRs support High Speed Sync and what other requirements are there?

Cameras: The Speedlite 430EX II's manual (p.37) states that: If you use the 430EX II with a Type-B camera (TTL autoflash EOS camera), note the features available and not available below. When a ...
flolilo's user avatar
  • 6,468
2 votes

Can I get high-speed sync with an iISO-hotshoe Sony body, a Godox speedlight, and a hotshoe adapter?

No. That adapter won't work for HSS. That adapts the iISO hotshoe to an ISO "universal" hotshoe, but that only communicates the sync (fire) signal, not the full hotshoe communication ...
inkista's user avatar
  • 52.1k
2 votes

HSS and TTL not working with Fuji X-Pro2 and Godox system

The SK400II doesn't suport TTL or HSS. In a monolight, you have to upgrade to something like the QT series, or one of the AD battery powered lights. The trigger supports all the Godox 2.4GHz lights, ...
Robin's user avatar
  • 1,582
2 votes

Why can't HSS mode be automatically turned on for shutter speeds faster than the max speed sync?

Nikon does. Nikon speedlights automatically switch into HSS, and Godox strobes do as well with the correct TTL radio trigger. You just have to set the flash sync to 1/250* (or 1/320*) in the camera's ...
Steven Kersting's user avatar
1 vote

What is the best shutter speed to use with a speedlight on my camera?

What is the best shutter to use for general portraits in and out doors? There isn't one. As with ambient-only exposure, it all depends on your lighting conditions and what effects you're trying to ...
inkista's user avatar
  • 52.1k
1 vote

Yonguno YN600EX-RT and Canon T6 High Speed sync issue: Horizontal lighter band in picture

If the frame is correctly exposed except for a lighter band, that may indicate an overlap, which might happen if the shutter is delayed in its travel. HSS fires the flash with extremely precise ...
Zeiss Ikon's user avatar
  • 7,141
1 vote

Can I use Godox V860ii C on Sony a6500?

If you need TTL/HSS, then whatever goes on the hotshoe of the camera has to have a matching flash foot that has all the contacts required for electronic communication. So, the V860II-C or the X1T-C ...
inkista's user avatar
  • 52.1k

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