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Slow Sync Flash by Russ Burden
by Russ Burden
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Slow sync photography allows you to use a long shutter speed, then pop the flash in order to get a sharp subject and a blurred background ...


Slow Sync
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Slow Sync Flash: 1st Curtain Or 2nd Curtain?
Filed in Tips by David Peterson - 1 Comment ...

Slow sync flash outdoors at sunset captured gulls in mid flight with interesting effects.

Slow sync
When using Slow Sync, your camera will use both a flash and a longer shutter speed, which can be great for creative movement effects - capturing a sharp photo of your subject and blurred background
Rear curtain ...

~ Flash mode
Using a DSLR flash in manual mode
Learn how to use the built-in flash in manual mode on a digital single lens reflex cameras such as the Canon Rebels.

~ - A flash mode used with a slow shutter speed to take a picture that contains both blurred and sharp objects. For example, the shutter remains open to make a blurred exposure without flash of an object in motion and then the flash is activated to "freeze" the object.

~
At night and in low light you get a much more attractive picture balanced with flash lit foreground subjects.
Slider ...

~
A flash technique for using the flash at a slow shutter speed. Flash shooting in dim light or at night at a fast shutter speed often results in a flash-illuminated subject against a dark background.

~ - A special mode in digicams that opens the shutter for a longer than normal period and fires the flash just before it closes. Used for illuminating a foreground subject yet allowing a darker background to also be rendered.

2. Try Slow Sync Flash
Another limitation with in built flash units is that they can produce quite harsh results that mean any other ambient light in a scene is lost. This is partly because the light they produce is unable to be directed/bounced indirectly onto your subject.

~ isn't selectable separately on these Canons. Program mode always uses a faster speed of about 1/60 as its lower limit. Tv, Av or M modes use slow sync by default. See p.92 of Canon's 20D manual for details.

~hronization - is used in night photography when you want to activate the flash and maintain the low shutter speed in order to expose the background.

Sometimes slow sync is a desirable effect, since it can add a sense of dynamic motion to a photo. However, it can also tend to look like a blurry mess. If you want to freeze motion with your flash unit you should set a faster shutter speed.

On, Redeye, Slow Sync, Slow Sync + Redeye, Trailing Curtain Sync, Wireless
Flash exposure compensation
-2 to 1 EV (1/2 steps) ...

~ flash control. Most cameras provide a special "Night shot" shooting mode that combines a flash firing with a long exposure to capture images that have well-exposed foregrounds and backgrounds.

5 Pop-up flash slow sync:
Most DSLRs with the pop-up enabled will override autoexposure if it will drop the shutter speed below a certain level (often, around 1/60 sec). So a scene that needs a slow shutter speed for correct background exposure ends up looking like a flash snapshot.

AE Lock button / Slow Sync / M-Shift

By default acts as a standard AEL lock button (hold it down to lock the exposure), though you can change the behavior to 'Hold' (press once to activate AEL).

html" } , { "Title" : "Auto Slow Sync" ,"GlossaryIcon" : { "Height" : "55" , "Width" : "65" } ,"HideInGlossary" : "" ,"Summary" : "Auto Slow Sync is a flash mode that is used when shooting portraits at night.

It has six modes, Auto, Red-eye reduction, Slow synchronisation with red-eye reduction, Slow synchronisation, Fill-in for exclusive flash, and Manual. Olympus quotes a maximum range of 11.1 Metres at 1600 ISO and there's also a published guide number, always more useful for comparison purposes, of 5.

Most cameras will have an Auto mode and there are usually several other modes including, Red eye reduction, Off, On, Slow sync.Most SLRs and some compacts have the option of attaching an external flash on an accessory shoe.

Auto, Red-eye reduction, Fill flash, Flash off, Slow synch red-eye reduction, Slow synch (1st curtain), Slow synch (2nd curtain), Manual full, Manual 1/4, Manual 1/16, Manual 1/64
Color Modes
Vivid, Natural, Muted, Monochrome ...

Auto, Fill, Red Eye Red. Off, Slow Sync in Image mode
Burst mode
1.7 frames per second ...

While some cameras default to a 1/60th or higher shutter speed, others allow you to set a slower shutter speed (often called "slow sync"). Start with your default shutter speed, and dial in a slower shutter speed, and you will pick up more ambient light with each step down in shutter speed.

~
SLR - "Single Lens Reflex."
snoot - a tube or cone attached to a lamp or flash unit to restrict the light, producing a spotlighting effect.
soft box - a diffuser built around the bulb of a photographic lamp, used to soften the light.

Using flash outdoors is an effective way of recording actual colors and more of the detail in a scene. For example, if you have a moving subject in front of a colorful sunset, you can set your flash mode to slow sync and get all the details.

However, unlike with Auto and P modes, the flash ratio never increases beyond about 1:1 and exposures are as long as necessary (aka "slow sync"). In Tv mode, the flash ratio may also increase if the necessary f-stop is smaller than available with your lens.

8 lens has 8 elements in 6 groups and 1 aspherical lens, and an aperture range up to f/16 in 1/3-stop increments. Shutter speeds range from 30-1/2000 second. A pop-up flash can capture first and second curtain flash, slow sync flash and other standard flash settings.

On forces the flash to fire as a fill-in for daylight pictures that have harsh shadows or to illuminate a close subject in a night scene. Slow sync fires flash and records the ambient exposure, which is great for creating image trails and creative subject movement.

~h or fill-in mode is the most versatile. The camera will choose a shutter speed for the ambient light plus a small dose of flash to lighten the foreground. This will make for a balanced picture as the subject will be lit by the flash while the background will be recorded as well.

See also: See also: What is the meaning of Slow, Camera, Light, Flash, Image?

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