time lapse while shooting cars question (get the cool light trail effect)

J

JimtheJib

Well-known member
i was wondering how i could achieve the light trail effect using the timelapse feature in the dvx. is the 1/24th of a second shutter speed slow enough? would any other setting improve or make it happed?

thanks
 
the slower the shutter speed, the more motion blur you will get, so you might have to go alot slower than that, but i guess that really depends on how long the time lapse is and how fast you will replay it. i don't know if i do it the right way, but i usually set the shutter as slow as possible and record constant video (not intervals) for a long time (10-20 min for a clip that is a few seconds long)
 
I don't know exactly what you're going for, but if you want something like this:

light_trails.jpg


Where the trails truly stretch the frame, you're actually looking at an exposure time of anywhere from 1/2" to 10 seconds (my guess is this one is about 5 seconds), which the DVX is simply not capable of. It's possible the effect could be duplicated in post with a time echo of the lowest shutter speed possible, I'm not sure.
 
You are not going to get satasfactory light trails with the dvx. I sugest using a DSLR and shooting the timelaps like that.
 
If you want the above look it is a 3 or so minute exposure with a still camera. You could do a rig shot or a lock down and frame blend in After Effects. Shoot 10 to 1 ratio. But no go in a DVX.
Sorry ...
 
That usually is done in video with broadcast cameras that can shoot a shutterspeed of 1/1 and then edited in post.
 
the slowest shutter speed you can achieve with dvx100A is 1/3 sec. in slow shutter mode, and a car doesnt go too far in 1/3 sec.
but working in post (also accelerating the footage to avoid jerk motion) you may be able to get some interesting effect.

Andrea
 
Wow, I completely forgot I had this, but your question made me remember it. About 2 years ago I did a little test shoot which was actually the inspiration for my film "Awake".
I shot this test with four rolls of Kodak Gold 100, 36exp at F11, 45 sec exposure. It was a long night, but it was a good learning experience. This is how it came out. Enjoy.

http://www.stefweb.net/Timelapse-web.mov
 
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