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Advice needed for sharp bird shots
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<blockquote data-quote="aroy" data-source="post: 565148" data-attributes="member: 16090"><p>If you use TTL mode (not fill flash mode), then most of the lighting will be from flash and not ambient. In that case the bird will be lighted for only the flash duration ~ 1/2000 or less. That is enough to freeze the motion, both of the object and the camera. In D3300 I get fill flash mode if I select Matrix Metering and TTL mode if I select Single Point metering.</p><p></p><p>Higher flash speeds are used mainly for "Fill Flash" in bright sunlight when you want to balance the ambient light with flash.</p><p></p><p>A short explanation on flash working</p><p>. For focal plane shutter bodies the shutter moves there are two curtains- the front and the rear. The front curtain starts first and the rear follows with a time gap so in effect a slit moves exposing the sensor.</p><p>. The shutter moves at a constant speed and the width of the slit increases as the exposure speed is reduces, till below a certain speed the rear curtain starts after the front curtain has finished. Below this speed the rear curtain will start after with a delay commensurate with the speed selected.</p><p>. The electronic flash fires for a very short duration - 1/2000 to 1/10000 of a second. As the shutter moves in a slit the flash cannot expose the whole sensor unless the slit is the size of the sensor. That happens when the front curtain has reached its end and the rear curtain has not started. The exposure speed at which this happes is called the "Flash Synchronization Speed". This speed varies from body to body and can be as low as 1/60 of a second to as high as 1/400, In most Nikon bodies today, it is between 1/200 and 1/250 of a sec.</p><p></p><p>One method of overcoming the limitation of the focal plane shutter's synchronization limit is for the flash to follow the slit and fire multiple number of times so that the sensor is fully exposed (albeit in seamless strips). That mode is the HSS mode and has to be supported both by the body and the flash gun.</p><p></p><p><a href="https://fstoppers.com/originals/demystifying-high-speed-sync-68527" target="_blank">https://fstoppers.com/originals/demystifying-high-speed-sync-68527</a></p></blockquote><p></p>
[QUOTE="aroy, post: 565148, member: 16090"] If you use TTL mode (not fill flash mode), then most of the lighting will be from flash and not ambient. In that case the bird will be lighted for only the flash duration ~ 1/2000 or less. That is enough to freeze the motion, both of the object and the camera. In D3300 I get fill flash mode if I select Matrix Metering and TTL mode if I select Single Point metering. Higher flash speeds are used mainly for "Fill Flash" in bright sunlight when you want to balance the ambient light with flash. A short explanation on flash working . For focal plane shutter bodies the shutter moves there are two curtains- the front and the rear. The front curtain starts first and the rear follows with a time gap so in effect a slit moves exposing the sensor. . The shutter moves at a constant speed and the width of the slit increases as the exposure speed is reduces, till below a certain speed the rear curtain starts after the front curtain has finished. Below this speed the rear curtain will start after with a delay commensurate with the speed selected. . The electronic flash fires for a very short duration - 1/2000 to 1/10000 of a second. As the shutter moves in a slit the flash cannot expose the whole sensor unless the slit is the size of the sensor. That happens when the front curtain has reached its end and the rear curtain has not started. The exposure speed at which this happes is called the "Flash Synchronization Speed". This speed varies from body to body and can be as low as 1/60 of a second to as high as 1/400, In most Nikon bodies today, it is between 1/200 and 1/250 of a sec. One method of overcoming the limitation of the focal plane shutter's synchronization limit is for the flash to follow the slit and fire multiple number of times so that the sensor is fully exposed (albeit in seamless strips). That mode is the HSS mode and has to be supported both by the body and the flash gun. [url]https://fstoppers.com/originals/demystifying-high-speed-sync-68527[/url] [/QUOTE]
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