LIGHTSCHEMESStructured lighting intelligence

Color & mixed light

High-speed sync

High-speed sync (HSS) lets flash fire at shutter speeds above normal sync — hold sky color while lighting faces.

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Setups using this tool

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What it looks like

High-speed sync, rigged as it is used — High-speed sync (HSS) lets flash fire at shutter speeds above normal sync — hold sky color while lighting faces
High-speed sync, rigged as it is used — High-speed sync (HSS) lets flash fire at shutter speeds above normal sync — hold sky color while lighting faces

How to use this tool

What it does

Normal sync caps around 1/200s on many bodies; beyond that, shutter would clip flash. HSS pulses or trails flash so subject can be shot at 1/1000s+ with sky still exposed.

When to use it

Sunset portraits, bright outdoor fashion, any outdoor lesson balancing ambient sky + flash.

What to look for in the photo

Saturated sky + lit face in same frame; without HSS, sky blows white or face silhouettes.

Placement basics

Meter sky for desired saturation (underexpose sky slightly for drama). Add flash in softbox close — HSS power loss is real. CTO gel flash if sun is very warm.

Distance & power

Expect 2–3× power loss vs normal sync; use wide aperture, multiple speedlights, or move modifier closer.

Common mistake

Metering flash first → grey sky. Fix: sky exposure first, flash second.

Pro tip

Shutter drag variant: tripod, slow shutter for clouds, HSS flash freezes subject — hybrid drama.

Practice on set

  1. Ambient-only sunset silhouette reference.
  2. Meter sky; set ISO/aperture/shutter for sky.
  3. Add HSS flash on face until skin matches intent.

Related setups

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