MIOPS: Smartphone Controllable High Speed Camera Trigger Review (Part Two)

May 04, 2015  •  Leave a Comment

MIOPS: Smartphone Controllable High Speed Camera Trigger Review

Part Two: The Sound Sensor

Of all the high speed devices I have tried over the last few years, my favourite trigger to use is without doubt the Sound Sensor. It is probably one of the easier and most flexible sensors to use. The sound sensor allows one to use a multitude of tools and items to trigger the camera. I've used air pistols, air cannon, catapults, my own voice, clapping, etc, in fact the list of sources to trigger a sound sensor is endless. Having said that I've used some sensors that are better than others. So how does the MIOPS rank on my list?  Again, this is another easy one to answer, it's simply the best I have used to date. From start to finish the unit was flawless. Ease of use combined with consistency of result and the ability to change settings via the smartphone was a dream set up. 

For this shoot I set my shed up with a master flash connected to the MIOPS unit and illuminating my subject matter. The MIOPS unit in this instance does not trigger the camera but the flash. I had a second slave flash with a blue diffuser attached to it on the opposite side but pointed to the background to illuminate that, both flashes were set to minimum power of 1/128 second. The camera was manually focused and set to self timer. The timer gave me the opportunity to swing the glasses and get out of the way before the noise of the glasses crashing together triggered the master flash. The camera was on a 2 second exposure to also aid with me getting out of the way. I checked all was set up ok and then adjusted the MIOPS settings, making a few dry runs to ensure I had all me the settings as I wanted them. I knew exactly how sensitive I needed the sound sensor to be, not to low that the MIOPS wouldn't pick up the sound of the glasses coming together, but also not to high that the sound of the camera would trigger the sensor. Then away we went, I closed the doors ensuring there was not too much light coming in and pressed 'Start' on the app on my phone.  After reviewing the image on the phone, I was able to adjust the delay of the flash so as to get the best (or different) result.

MIOPS, High Speed PhotographyMy set-upMy set up for the wine glasses crashing together.

The App Settings

Sensitivity was set after a little trial and error in dry runs, this picture is for illustration purposes as I used a slightly lower setting than this. My delay settings varied after reviewing the images on the back of the phone, very often it only takes a few milliseconds either side to make a substantial difference, especially when using faster moving objects such as pellets from an air pistol. To avoid the sensor triggering your camera more than once whilst the shutter is open, it is important to set your app to trigger only once.

sound-3sound-3 sound-2sound-2 sound-1sound-1

 After all that, here are one or two of the results.

sound-4sound-4Sound trigger test 1 sound-5sound-5Sound test 2 sound-6sound-6Sound test 3


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