TPB #26 – Choosing a Flash for High Speed Photography

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This week I give an overview of what makes a good flash for high speed photography. Some of the important things to look for are a short flash duration, and a way to manually select the power level for the flash. Lower power levels tend to be faster so with high speed photography people usually select one of the lower power settings.

More info:
Video about the camera shutter
Video about measuring flash ...

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TPB #25 – Understanding Shutter Lag

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This week I explain shutter lag and how it affects high speed photography. The main message this week is that shutter lag at around 100ms is 1000x longer than flash duration. So for high speed photography people need to often use an external flash rather than relying on a shutter. This is usually accomplished by using bulb mode on your camera in a dark room and using a photo trigger like the ...

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TPB #24 – Faster Analog Reads on the Camera Axe

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This week I describe how the Camera Axe will be using a faster analog read mechanism in future releases. This new method sacrifices some precision for 8 times faster read. After including the overhead in the Camera Axe software the overall improvement is about 2.5x. This puts analog read performance much closer to digital read performance.

A huge thanks to gvi70000 on the Camera Axe forums who suggested this change.

You can get beta ...

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TPB #23 – Measuring Flash Duration

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This week I show how to measure flash duration using a light sensor and an oscilloscope. I also explain the advantages of xenon flash tubes and their downfall. Lastly I go describe a trick modern speed-lite flashes use to get their short durations.

After all this I measure the flash duration of a Canon 580 EXII and a Yongnuo 460 flash. Much to my surprise the Yongnuo flash had less than half the ...

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