Bill_Bolton
Well-known member
Re: can dvx pick up gun shots?
On a relatively slow projectile, like a .45 and 60i, you maybe could even capture the bullet as it heads downrange. I've seen frames where an Uzi 9mm was captured.
On a relatively slow projectile, like a .45 and 60i, you maybe could even capture the bullet as it heads downrange. I've seen frames where an Uzi 9mm was captured.
Shooter
Veteran
Re: can dvx pick up gun shots?
The thing was - when shooting with a film camera (as in 35mm) - if the camera operator saw the flash - the negative didn't. So it wouldn't show up. I got caught out on this years ago and it took a bit of working out where it went. I know I saw it but...
Problem was was due to the reflex viewing system in a film camera where the maltese cross style mirrors alternated the view to the operator then the film. I wouldn't hazard a guess if the DVX would see it or not - they are a hell of a short duration and could easily get lost in the scan. Try shooting a camera flash as a test. - Not straight down the lens tho'.
Chances of seeing a projectile are absolutely nil unless you had maybe 16000fps + camera. Try and shoot a golf ball off the tee with a DVX. Bet you cant see it after impact.
The thing was - when shooting with a film camera (as in 35mm) - if the camera operator saw the flash - the negative didn't. So it wouldn't show up. I got caught out on this years ago and it took a bit of working out where it went. I know I saw it but...
Problem was was due to the reflex viewing system in a film camera where the maltese cross style mirrors alternated the view to the operator then the film. I wouldn't hazard a guess if the DVX would see it or not - they are a hell of a short duration and could easily get lost in the scan. Try shooting a camera flash as a test. - Not straight down the lens tho'.
Chances of seeing a projectile are absolutely nil unless you had maybe 16000fps + camera. Try and shoot a golf ball off the tee with a DVX. Bet you cant see it after impact.
Barry_Green
Moderator
Re: can dvx pick up gun shots?
If you shot in interlaced mode, you'd definitely see the flash.
In progressive, you have a 50% chance of seeing it, unless you change the shutter to 1/24, in which case there'd be a 100% chance of seeing it.
If you shot in interlaced mode, you'd definitely see the flash.
In progressive, you have a 50% chance of seeing it, unless you change the shutter to 1/24, in which case there'd be a 100% chance of seeing it.
Shooter
Veteran
Re: can dvx pick up gun shots?
Barry
That would be debateable and I don't think your math stacks up. The gun flash is shorter in duration ( say 1/30,000th of a second) than it takes for the scan of the frame (or field). Say 1/48th of a second..the camera will only pick up part of it in the scan lines. Not enough visual info to fill the scan lines ( interlaced or otherwise).
To the viewer, they need to register something from a sequence of frames. One frame barely registers ( subliminal). Two frames barely (semi subliminal). To see a muzzle flash would require about maybe 5 or 6 frames. To create that from a such a short event as a muzzle flash requires serious time compression ( slo-mo)
Barry
That would be debateable and I don't think your math stacks up. The gun flash is shorter in duration ( say 1/30,000th of a second) than it takes for the scan of the frame (or field). Say 1/48th of a second..the camera will only pick up part of it in the scan lines. Not enough visual info to fill the scan lines ( interlaced or otherwise).
To the viewer, they need to register something from a sequence of frames. One frame barely registers ( subliminal). Two frames barely (semi subliminal). To see a muzzle flash would require about maybe 5 or 6 frames. To create that from a such a short event as a muzzle flash requires serious time compression ( slo-mo)
Re: can dvx pick up gun shots?
[quote author=SafetyO link=board=Events;num=1097990675;start=15#20 date=11/28/04 at 19:55:32]Birth Name: Jon Eric (no hyphen) Hexum
Date of death: October 18, 1984
Cause of death: Accidental self-inflected gun shot to the head
Bummer...[/quote]
He was on Voyagers -- I loved that show.
[quote author=SafetyO link=board=Events;num=1097990675;start=15#20 date=11/28/04 at 19:55:32]Birth Name: Jon Eric (no hyphen) Hexum
Date of death: October 18, 1984
Cause of death: Accidental self-inflected gun shot to the head
Bummer...[/quote]
He was on Voyagers -- I loved that show.
Re: can dvx pick up gun shots?
..barry is pretty much right about capturing the muzzle flash. ive shot ALOT of footage with real guns , and although the flash may only be there for a very breif time(of course this time is variable pending the type of gun, and the load used) if its there for one frame , its captured, and pending how bright it is against its surrondings, it will be noticed. usually it lasts from .5 to 1.5 frames pending how much powder your burning up in the gn your using. if its dark out, you will see it , if its broad daylight, you will not see it nearly as much. (on a side note, im personally sick of seeing people put muzzle falshes on guns in post for a scene thats in broad daylight.. i mean i know you want it to look cool. but you just dont really see muzzle flashes in the daytime most of the time.. so it only looks fake and cheezy when you have it on every shot from some 9mm.. its like adding a beam to a flashlight in post when someone turns it on in broad daylight.).. if i were to add them in post, i would only use a duration of 2 frames max. 3 is a little too long, and only helps make it look fake. 1 is ok for most of the time. and 2 if you want it to be really bright or seem like a big blast.
..barry is pretty much right about capturing the muzzle flash. ive shot ALOT of footage with real guns , and although the flash may only be there for a very breif time(of course this time is variable pending the type of gun, and the load used) if its there for one frame , its captured, and pending how bright it is against its surrondings, it will be noticed. usually it lasts from .5 to 1.5 frames pending how much powder your burning up in the gn your using. if its dark out, you will see it , if its broad daylight, you will not see it nearly as much. (on a side note, im personally sick of seeing people put muzzle falshes on guns in post for a scene thats in broad daylight.. i mean i know you want it to look cool. but you just dont really see muzzle flashes in the daytime most of the time.. so it only looks fake and cheezy when you have it on every shot from some 9mm.. its like adding a beam to a flashlight in post when someone turns it on in broad daylight.).. if i were to add them in post, i would only use a duration of 2 frames max. 3 is a little too long, and only helps make it look fake. 1 is ok for most of the time. and 2 if you want it to be really bright or seem like a big blast.
Re: can dvx pick up gun shots?
heres a whole bunch to check out:
http://www.artbeats.com/prod/search.php?pg=3&kw=gun+stock&fm=&ct=
heres a whole bunch to check out:
http://www.artbeats.com/prod/search.php?pg=3&kw=gun+stock&fm=&ct=
Ben Sliker
Pain In The Ass 2.0
I own a couple 8mm blank guns (the ones that flash out the top) and once shot them with a crappy D8 sony camera. And the flashed shows up in 2 frames, small in one, big in the next. I'm sure the DVX could pick it up at least that well.