Man, You guys are a hard sell.
Bob
Man, You guys are a hard sell.
Bob
Bob
After reading the title of this thread, I thought you had literally shot the poor 7D... Maybe I need some sleep. I agree with the above though, maybe try to get a clearer shot of the bullet the next time you can do this.
wow.......great shots......and whoever the shooter is - what an amazing shot he is[:O]......he hit that insect in frame two with one shot....notice in frame 3, the insect is no longer there? [:P] lol.......just kidding [] i also like frame 4, catching the ejected casing
jim
Ok, Just to put this in perspective: Assuming the bullet travels at 1450 feet per second and the shutter speed is 1/8000 of a second---I calculate that a half inch bullet travels at 2.1 inches while the shutter is open. The 7d, at best, will only deliver a 2.1 inch blur of a 1/2 inch object----Now if I had the skill to time a flash at precisely the right moment, Then maybeI could capture a frozen bullet in the air----But I just ain't that good.
Where are the engineers and math whizzes----are my assumptions and calculations correct? What does it take to capture a frozen bullet ?
Just a drill,
Bob.
P.S. Is lightning this difficult?
Bob
Triggering the strobes with a circuit that detects the gunshot, and adjusting the flash positions until you find the sweet spot could work. Remember 1/8000th is actually a stroboscopic flash as the second curtain has to chase the first requiring the flash to sync to each segment of the exposed sensor.
I have a setup with 3 580exII's on a single light stand that should work.
BTW - I'm saving for the radiopopper PX system as I want at least 1/500th sync speed. This will cost a bit with 4 flashes, but I've come this far! -Shea
Cool shots Bob!
Perhaps it's an idea to shoot some video with high shutterspeeds? And then do some print-screening [
Have fun out there!
Originally Posted by Sheiky
Good Idea Jan, I think I will try a dual setup next time --one video and on still camera.
Bob
You'll never see it in video. A sound trigger is probably available as a cheap kit if you don't mind a little iron work.
Don't forget the angle of the dangle this shot was taken at. Your 2.1 inches will look shorter from the angle that the 7D was placed at for the shot.
I think you did the math pretty well......assuming the correct bullet velocity (which can vary alot depending on the particular ammo)
1350 ft/secX0.000125 sec= 0.16875 ft
0.16875ft X 12 in/ft = 2.025 inches
It will certainly look like a streak butyou might have been lucky and got the timing right....in the second shot you can see the slide on the gun has started backwards and there are exhaust gasses visible so the bullet has definitely left the barrel....so maybe it is the bullet but.....
Also the shutter lag has to be considered which is in the range of 0.05 to 0.080 sec. So... to get it right without a trigger and mulit-flash set up is a bit lucky. The bullet could move60 to100 feet between the time you push the button and the picture is taken!
If you try again, attempt to get the sun angle on the bullet and look for a featureless background so it might stand out better.
Joel
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