Some high speed camera video

[aroundlsu]

Got to play with the high speed camera today. First of all, this high speed stuff is not easy. You got just a few seconds window to get the shot, it needs massive amounts of light, and then will overheat spontaneously. And the lens it came with sucks.

I plan to rent a better lens next week, some massive lights, and try again. Anyway, here are the videos.

[ame]http://www.youtube.com/watch?v=otUi05V5h5M[/ame]

[ame]http://www.youtube.com/watch?v=l127TfpLNhg[/ame]

[ame]http://www.youtube.com/watch?v=RveJCSFtK_I[/ame]

 

[jjoker16]

Thats awesome! yeah, definetly more light. How bright was it where you shot that?

 

[aroundlsu]

That was shot in full bright sunlight. We need to bring in some large movie lights to really make it look decent.

 

[Baldrik78]

That is freaking sweet. Like you said, needs more light, but freaking sweet none the less.

 

[Sin-ster]

Whoah, really cool footage.

So those cameras they use that actually show you the flight of the bullet most be ridiculously expensive and even more of a PITA to work?

The first two aren't terrible at all; the only one I found really dark was the last.

 

[VeedUp]

Sweet still none the less

 

[sonanth]

I would just like to point out how much WIN! is in this thread.

10!......a f*ing 10!

Nice vids man.

 

[aroundlsu]

Whoah, really cool footage.

So those cameras they use that actually show you the flight of the bullet most be ridiculously expensive and even more of a PITA to work?

The first two aren't terrible at all; the only one I found really dark was the last.

In theory this is one of those cameras that can show the bullet. The problem is as you increase the speed you need exponentially more light. At the maximum frame rate of 6,000fps the picture is black even in bright sunlight.

For the high speed shots in inception they used 20k watt lights 6 feet from dicaprio. I can rent those lights here in town and will try again next week.

 

[LACamper]

Very cool!
Why the limited time limit? Storage issue?

 

[Khyber]

Got them posted already, Teddy? They look good. They were fun to make. I want to try my 1911 sometime with the camera.

 

[jimdana1942]

I musta missed something, I didn't see anything.

 

[SKYWLKR]

Storage and Band width.

Think about this...

A 2 hour Blueray is 1080 at 30+ frames Per seconds (some can do 120FPS but there is some frame repetition with current technology ) that is a total of 108000 frames at minimum (Which is ~17-27 Gigs and at that it is a compressed size!!!).

High Speed is about 1500-6000 (wow, I didn't know it could go that high in HD+ resolutions)FPS. lets go for 2000 FPS so we could at least watch a decently fast hand gun round. That would be the equivalent of the above movie recorded in 54 seconds.

Go up to 4000 FPS and that would be 27 seconds

But the Ram buffer is not that big, I think they are normally limited to about 5-15 seconds of recording time and then could take an hour to transfer from buffer to Flash or HDD.


As far as the light requirement, the faster the capture (each frame),that means there are less photons of light hitting the CCD per capture so you need more and more and more light to make an image develop.

 

[Khyber]

Some of the camera setups for the more 'scientific' type events have 'strobe' type lights that are all synced with the event in question, just to get enough light for an image.

 

[LACamper]

Just curious, instead of storing on the camera, can you store straight to a PC? Maybe onto a SSD hard drive?

 

[SKYWLKR]

The data is huge so the transfer over wire is the issue.

The CCD has direct access to a Ram buffer which is faster than a non proprietary interface.

 

[aroundlsu]

Really the storage isn't the big issue. The light is the big issue. Some synced strobes would be awesome.

 

[SKYWLKR]

Does the camera have a syncing signal? At least the stuff we're high speeding wont melt in front of the camera if we can scrounge up enough lights!

 

[Sin-ster]

Can't wait to see what you get when you play around with more light.

 

[sonanth]

Got them posted already, Teddy? They look good. They were fun to make. I want to try my 1911 sometime with the camera.

JMB approves this post.

 

[jjoker16]

Where do you get access to those cameras?