Posted by: Maurice
In this video I show how to connect four valve sensors to the Camera Axe. It requires new software and a new cable. The software is linked below. The new cable is in the store below, but it is also very easy to make. I forgot to mention this in the video, but all you need to make the cable is a stereo splitter 3.5 mm cable. Then in one ...
Continue Reading →This episode describes how a shutter works and answers the three questions related to shutter lag, high speed two curtain shutters, and high speed flash sync.
Continue Reading →Posted by: Maurice
In this video I over using a flash hotshoe with the Camera Axe and and connecting it to small tabletop tripod.
Check out the Camera Axe store where there is more info about these devices.
Continue Reading →Posted by: Maurice
In this video I talk about the Multi-Flash Plus. I go over the basic hardware and software design and then demonstrate using it triggering a bunch of flashes in rapid squence. Some of the use cases for this device would be bullet time videos or multiple flash exposure sequences.
You can get the schematics, pcb files, and bill of materials from this site.
You can get the source code from Continue Reading →
Posted by: Maurice
This video goes over the Flash Test Menu and finds why it hasn’t been reporting correct flash durations. The problem turned out to be the light sensor being used is not fast enough. To make this mode work reliably we’ll need a new light sensor that quickly transitions from <1V to >4V. I estimate a responce time of less then 5 us would be good for standard flashes and less than 0.1 ...
Continue Reading →Posted by: Maurice
This week’s video is about very high speed flashes and whether LED based flashes are practical at these speeds. The dominant flash in this space is the air-gap flash with it’s half microsecond flash duration it is about 100 times faster than a typical speedlite flash from Canon or Nikon. I do some calculations that try to figure out how many LEDs you would need, what kind of current you’d need to driver ...
Continue Reading →In this week’s video I look at the lag introduced by using a master flash to optically trigger a slave flash. Then I look at this extra lag and see how that would impact some common high speed photography cases like photographing a moving bullet and water droplets.
* Video about measuring Flash Lag
* Video about measuring Flash Duration
* Video about the MultiFlash board
Posted by: Maurice
This video shows the new and improved valve sensor I’ve been working on for the Camera Axe. In the video I demonstrate how to setup the software to take a photo of colliding drops.
* The Camera Axe 5.3 beta6 software I used
A big thanks to Dave, Ric, and Ernie for helping me test and come up with ideas on how to improve this sensor. Thanks guys!
Continue Reading →Posted by: Maurice
This video is about measuring the lag between when a flash is triggered and when light is emitted from that flash. I show the setup I’m using to measure this and then I measure this flash lag for a Yongnuo YN460, Canon 580EX, and a Canon 580EXII. I found the flash lag to be around 50-60 microseconds which is 1000x faster than your typical shutter lag.
Other related videos:
* Understanding Shutter Lag
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This week I demonstrate how to use the Camera Axe to photograph a popping balloon. I go over some some tricks to do with the balloon to make it look more impressive, how to setup the Camera Axe software, and the setup of your camera and flash. It’s quite easy to do once you understand the basic technique.
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