Posted this on Facebook, getting word out in email. May I share the info here about the Nikon flash? - Bobbie On Fri, Dec 30, 2011 at 8:30 AM, Herschel Mair <herschel@xxxxxxxxxxxxxxxx> wrote: > The camera is left open for a few seconds in semi-darkness and the flash is > fired directly by the gadget. > > 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 output > > Now 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 >>>> science >>> >>> >>> Drat 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. >>> >> >> >
