HVX200 Slow Shutter Speed Capability?

Ralph Oshiro

Ralph Oshiro

Veteran
Now I'm getting very interested in the camera's slow shutter speed capability to compensate for its reduced sensitivity (compared with broadcast 60i cameras). Don't know if there's going to be a "frame accumulation" mode or not.

From the Japanese spec sheet someone posted awhile ago, here's what I've got. If anyone has newer information, please post.

Slow shutter speed:
60i/60p mode: 1/15, 1/30
30p: 1/15
24p: 1/12

Shutter speed (variable):
60i/60p mode: 1/60-1/250
30p: 1/30-1/250
24p: 1/24-1/250
 
Hey NBC,

I would suspect that the HVX will have similar capabilities as the DVX, but until its released...

PS I noted the new sig line "COMING SOON: A PANASONIC HVX200 AND LOTS AND LOTS OF GREENSCREEN FABRIC"; so are there two new camera's in your future?
 
khmuse said:
PS I noted the new sig line "COMING SOON: A PANASONIC HVX200 AND LOTS AND LOTS OF GREENSCREEN FABRIC"; so are there two new camera's in your future?
Click to expand...
If you read his post about the first shot we've been given from the HVX, he's very excited about the color sampling capabilities of the HVX and intends to do greenscreen work with it. Hence the need for lots of green fabric. One camera, not two.
 
Actually, the second shot that was sent in the correct aspect ratio was a lot better than the first HVX200 still frame shot.




tiff file is HERE
 
Right, Haakon! Yup, kh, I change minds about my "new" camera as often as I change my mind about my girlfriend, and you know how often THAT is.
 
Plus, I just re-watched Sin City on DVD. That's some pretty creative stuff. With the HVX' 4:2:2 color sampling, I'm a bit more ahead of the game in the green screen business. I'm still awfully torn about the light sensitivity. That's why the interest in slow shutter speeds.

The DSR450's slow shutter goes down to 1/1.6 (0.625 seconds). Plus it's an f/11 camera to begin with. Can you imagine a time-lapse scene lit only by moonlight? How awesome would THAT look?
 
Hey NBC, how 'bout I toss you a theoretical bone here... you know how you compared the HVX against the DVX and came away with an (admittedly unscientific, we know) opinion that the HVX is a stop slower than the DVX... I'm assuming that was 1080i against 480i, right? Interlaced on both?

... 'cause, get this: now that they've told us that the chipset is native progressive, what if it turns out that in 24p mode, the HVX is every bit as fast as a DVX in progressive mode?

Would that make you happy?

I figure that a DVX in interlaced is about a stop faster than the DVX in progressive. And if the HVX isn't actually scanning its chip interlaced, it won't get that sensitivity boost that comes from row-pair summation. They as much as said that it scans at 1080/60p, and then converts from there, so it probably does a simple interlacing of the two progressive frames...

... which means that 24p shouldn't be a stop darker, right? Should be the same, or perhaps even a bit brighter because of the 1/48 shutter speed...

... but with the same low-noise performance...

Okay, okay, we won't know until December 8th or whenever, but I was thinking about it, and if the HVX comes out at the same sensitivity (in progressive) as the DVX, but with the better low noise performance that it's already exhibited... that's gonna RULE. And I can see how it might happen. Doesn't mean it WILL happen, but it might!
 
Barry_Green said:
I'm assuming that was 1080i against 480i, right? Interlaced on both?
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Yes, it was a 480i-to-1080i comparison. Your theory sounds good to me, Barry! In any case, in a pinch, I'll be able to make my exposure at 1/24th (though, a bit blurry) in addition to perhaps a +9 dB gain up.
 
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