Re: does anyone have experience with high speed freezing the action photograp...

2004-01-23 Thread Bob W
Hi, It's possible to get bullets that travel at subsonic velocity. They make less noise. Even supersonic ones are not that fast, I think. 700 mph is quite fast! The reason I thought about it was that one of my friends has discovered rats in her garden. I toyed with the idea of getting a

Re: does anyone have experience with high speed freezing the action photograp...

2004-01-23 Thread Dr E D F Williams
: Re: does anyone have experience with high speed freezing the action photograp... Hi, It's possible to get bullets that travel at subsonic velocity. They make less noise. Even supersonic ones are not that fast, I think. 700 mph is quite fast! The reason I thought about

Re: does anyone have experience with high speed freezing the action photograp...

2004-01-23 Thread Mark Roberts
Bob W [EMAIL PROTECTED] wrote: Those were photos from Doc Edgerton's lab at MIT. They used some good size flash tubes, and I believe a microphone was used to trigger the flash. Polaroid film and open the shutter, fire the gun, which triggers the flash, and you see where the bullet is.

Re: does anyone have experience with high speed freezing the action photograp...

2004-01-23 Thread Bill Owens
Probably an air rifle pellet would still be in the barrel if you used a this method. Bill I'd have thought a fairly simple switch activated mechanically by the movement of the trigger would be a lot easier. -- Cheers, Bob

Re: does anyone have experience with high speed freezing the action photograp...

2004-01-23 Thread Tom Reese
Bob wrote: I'm speaking from a position of almost total ignorance here, but surely a bullet is travelling 2 or 3 times faster than sound? Over the short distances involved is it really possible to do this? bullet velocities can vary between 700 fps and 2300 fps for common guns. There are other

Re: does anyone have experience with high speed freezing the action photograp...

2004-01-23 Thread Hal Davis
For 22 cal. rifle and air rifle there are small commercial bullet traps available at low cost, less than $50. They do an excellent job containing the bullets. A switch on the trigger worked for me. Bob wrote: I'm speaking from a position of almost total ignorance here, but surely a bullet

Re: does anyone have experience with high speed freezing the action photograp...

2004-01-23 Thread Cotty
On 23/1/04, [EMAIL PROTECTED] disgorged: I'd have thought a fairly simple switch activated mechanically by the movement of the trigger would be a lot easier. -- Cheers, Bob Probably an air rifle pellet would still be in the barrel if you used a this method. Bill But wouldn't

Re: does anyone have experience with high speed freezing the action photograp...

2004-01-23 Thread mike wilson
Hi, Tom Reese wrote: I will try to do this in daylight with flash equipment set relatively close to the target for maximum power. My camera will be a bit further away with a telephoto lens (I don't want splattered fruit all over my lens!). I thought I'd stop the lens down to f/22 and shoot

Re: does anyone have experience with high speed freezing the action photograp...

2004-01-23 Thread Bob W
Hi, But wouldn't large(ish) calibre bullets make a mess of what you're trying to photograph - depending on subject, of course? If it was an egg, for instance, wouldn't an air gun pellet make a more interesting shot than a .22 round? there are some interesting examples here of someone

Re: does anyone have experience with high speed freezing the action photograp...

2004-01-23 Thread Dag T
På 23. jan. 2004 kl. 07.54 skrev mike wilson: Bob W wrote: I'm speaking from a position of almost total ignorance here, but surely a bullet is travelling 2 or 3 times faster than sound? Over the short distances involved is it really possible to do this? It's possible to get bullets that travel at

Re: does anyone have experience with high speed freezing the action photograp...

2004-01-23 Thread David Mann
Bob W wrote: I'm speaking from a position of almost total ignorance here, but surely a bullet is travelling 2 or 3 times faster than sound? Over the short distances involved is it really possible to do this? I would have thought a light or electric trigger would be better. e.g. fit the trigger or

Re: does anyone have experience with high speed freezing the action photograp...

2004-01-22 Thread Rfsindg
Tom, Those were photos from Doc Edgerton's lab at MIT. They used some good size flash tubes, and I believe a microphone was used to trigger the flash. Polaroid film and open the shutter, fire the gun, which triggers the flash, and you see where the bullet is. Then, adjust the microphone closer

Re: does anyone have experience with high speed freezing the action photograp...

2004-01-22 Thread Paul Stenquist
Part of the equation to making this work lies in shortening the flash duration. I don't know how current strobes work, but I recall that the old Honeywell Strobonars could be as fast as 1/50.000 of a second when the range was short and the flash was on auto exposure. In fact, I think the

Re: does anyone have experience with high speed freezing the action photograp...

2004-01-22 Thread Bob W
Hi, Those were photos from Doc Edgerton's lab at MIT. They used some good size flash tubes, and I believe a microphone was used to trigger the flash. Polaroid film and open the shutter, fire the gun, which triggers the flash, and you see where the bullet is. Then, adjust the microphone

Re: does anyone have experience with high speed freezing the action photograp...

2004-01-22 Thread Shel Belinkoff
Actually, Bob, many bullets are sub-sonic ... 2x faster is possible, AFAIK, but I can't recall reading of any at 3x the speed of sound. Perhaps some high powered rifles will get up close to that speed. I'm speaking from a position of almost total ignorance here, but surely a bullet is