India Point Park

India Point Park
by matt-ball                

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1

The question seems to make an incorrect assumption: that at a sync speed of 1/250 second the entire sensor is uncovered at the same time for 1/250 second. This is not the case. Most of that time is consumed by the first curtain opening and the second curtain closing. There is only a short instant between the transit of the two curtains when the entire sensor ...


5

I just read that a normal flash illuminates a scene within a 1/250th of a second. (A flash would keep the scene illuminated for a 1/250th of a second, right? Sort of, depending on the specifics of the flash unit and the power setting. For example, a Canon 580EX Speedlite set to full power discharges over 1/250s according to Andy Gock's Actual Measured ...


1

1/250 is the time that it typically takes for a mechanical shutter curtain to travel from one end position to another. So for any faster shutter speeds, the closing curtain has to start moving before opening curtain has finished its travel, and 1/250 is the fastest shutter speed where, for just a moment, the whole sensor (or film frame) is exposed at once. ...


15

I just read that a normal flash illuminates a scene within a 1/250th of a second. (A flash would keep the scene illuminated for a 1/250th of a second, right? In general, that's wrong. Flash duration is flash duration and sync speed is sync speed. Apples and oranges. The 1/250th of a second is the sync speed of (many) cameras. That's basically the ...


1

Your understanding of how a flash works is wrong. The flash duration is more in the range of 1/1000 to 1/8000. Due to physics and the design,the shutter needs to be open longer 1/1000 in order for the flash to "Sync". Flash photography usually involves both ambient light, and light from the flash. Usually we like to use faster shutter speeds to avoid ...



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