Re: I've launched my photo "Zapshooter" project
The flash I'm using is the Nikon SB800 and at 1/128 power the flash duration is 0.000024 sec (Give or take a hour or two....) Because of its thyristor circuitry it has no fall-off curve - the light is cut off abruptly.
Here's a chart of flash durations at the different power settings 1/1050 sec. at M1/1 (full) output 1/1100 sec. at M1/2 output 1/2700 sec. at M1/4 output 1/5900 sec. at M1/8 output 1/10900 sec. at M1/16 output 1/17800 sec. at M1/32 output 1/32300 sec. at M1/64 output 1/41600 sec. at M1/128 outputNow the gadget is not triggered by sound or light etc. The moment of flash-fire is determined by the position of the hammer/knife/blunt object that's doing the dirty work of smashing/stabbing/piercing/bludgeoning the subject matter.
So I set the sledge-hammer to fire the flash when it's 20mm from a hard surface. I then put a ripe tomato on the hard surface,open the camera and whack the tomato... The flash goes off when the hammer is almost all the way through the tomato - very juicy!
Herschel On 12/30/11 1:00 AM, Trevor Cunningham wrote:
Neat gadgets. Just wondering, how fast should flash units and shutter be for droplet images and things like, say, a shattering glass object? I don't doubt the units' ability to trigger quickly, but what about gear response?On 12/30/11 5:18 AM, David Dyer-Bennet wrote:On 2011-12-29 07:37, Herschel Mair wrote:For those of you that know me well, You'll remember a time when I was photographing bursting balloons and hammers smashing light bulbs etc. using a device made from a clothespin and thumbtacks! Well I've launched a project on Kickstarter.com to try and get funding for making the device commercially. Please watch the video and check out the pics at:http://www.kickstarter.com/projects/1286916869/zapshooter?ref=email<http://www.kickstarter.com/projects/1286916869/zapshooter?ref=email>and PLEASE pass this link on to anyone interested in photography or scienceDrat the timing; I'm expecting my <http://triggertrap.com/> device in February at this point, which I'm afraid means I'm not likely to be supporting your project significantly (spent that piece of the budget).Apparently it's steam-engine time. I've been sort-of looking for commercial devices in this space for decades, and in the last about three years I've found the Camera Axe, Trigger Trap, and now yours.