Boris Ekner wrote:
Location is a dark balcony in Guatemala City facing north. Ie no direct sunlight but a very bright sky that does all it can to ruin my pictures... So here is what I do to handle the situation.
To be clear, the flash sync speed of no more than 1/200 of a second is not enough to freeze the motion of the very fast hummingbird. To freeze the motion of a hummingbird - without flash - one needs a shutter speed of more than 1/2000 of a second and a lot of sunlight.
What I do is to set up the camera for an underexposed photo, ~4 stops. Depending on the ambient light the setup is between 1/40 - 1/200 sec, and an aperture between f/2.8 - ~f/18.
Standard/normal flash sync fires when the shutter is fully open. I use rear sync/curtain flash, meaning, as the shutter is about to close the radio controlled flashes fires.
Flash power is set as low as possible, because the lower the power the shorter the flash duration time. See added chart. I have found that several flashes at the same low power is better than one at slightly higher power.
This means that when the shutter opens the sensor doesn’t record much at all. It’s too dark. But as the flash fires into that darkness the very short duration time freezes the movement, like a stroboscopic light would do.
With this setup the shutter speed controls the amount of ambient light, the aperture controls the depth of field, and the flash duration time controls how much movement blur is captured by the camera.
Another benefit of using low flash power is that it recharges faster, and is able to fire several rapid shots in a row. Adding external battery packs of 6-8 AA batteries will improve recharging times.
With all the above said, the difference between a large studio light and a small speed light is not only the cord for the wall vs batteries. Studio lights actually shoot more or less at the same duration time but at different intensity/power. A speed light fires at the same power but at different duration time when the power is changed. This means that a studio light is not as suitable as a speed light is when it comes to freezing very fast motion.
Location is a dark balcony in Guatemala City facin... (
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I have to disagree a little with this. My Flashpoint strobes have a speed of 1/250 sec. at full power (about the same as the 1/313 of your speedlight) to 1/10,100 sec. depending on power setting used. They also have HSS to 1/8000 sec., TTL capability and second curtain sync. There may be some strobes that fit your statement, but certainly not all. Also, my FlashPoints have their own battery packs and do not require cords.
FlashPoints can be had on sale for 500 to 700, so not much more than a top of the line speedlight.