Shutter Degree ?

LighthouseMedia

LighthouseMedia

Well-known member
Okay
Someone please educate me, I understand shutter speeds and I know that shutter degrees correspond to a film camera, but could someone please elaborate on Shutter angles I know how to set them and I know that they give me varying degrees of light control, but like 350 Degrees seems about the same as setting my shutter speed to 1/24th so what does changing the angle of the shutter give me over adjusting the speed of the shutter, and if I adjust the angle the HVX no longer gives me a way to change the speed. So is it basically the same or is there a preset speed that corresponds to changing the angle? ie 1/60, is set speed for all degree modes? Anyone that can help clarify this for me would be great?
 
The fractional speeds (like 1/24, 1/60 etc) are fixed regardless of what frame rate the camera runs at.

The "degrees" speeds (like 180.0d) will mean different exposure times for different frame rates. The "degrees" shutter angles simulate the way a film camera works. A film camera shutter uses an opaque disc with a wedge cut out of it. The size of that wedge is expressed in terms of degrees. Think about a full circle, that's 360 degrees. So if you took out a right-angle chunk of the circle, that would be 90 degrees, so a 90-degree shutter angle. Or if the shutter disc was half-solid and half-open, that would be 180 degrees.

Well, a film camera shutter rotates once per frame. So for any given frame rate, the exposure is constant, but if you run the film faster through the camera, that means the disc will need to be spinning faster because it must still complete one rotation per frame. So faster frame rates = shorter exposure times, slower frame rates = longer exposure times.

You can force a fixed exposure time by using the fractional (i.e., 1/60) speeds, but then if you use offspeed frame rates, your footage's motion blur won't look right. Or you can use the degrees method, in which case the motion blur will track with the frame rate and will always look filmlike, but the exposure will change based on the frame rate you have selected. So it's your job to make sure to adjust your exposure when you change frame rates, just like on a film camera.
 
So now we don't change the shutter degree actually, like those in film industry...is that right?
I've got a DVX so I'm just curious, is there any video cam that uses a mechanical shutter?
And one more question, I've read that they changed the shutter degree in film cameras by actually removing pieces using special tools, if so, did that work affected DOF?

Sorry for asking with no order, After buying my DVX I've been reading your forum like mad, so I'm just a bit out of my mind.
 
No camera in this price range uses a mechanical shutter. You can use the syncro scan feature to get precise control over the exposure time, but it is still electronic.

The HVX simulates a film camera's exposure time characteristics by giving you a shutter that works in degrees.

Shutter angle never has any effect on depth of field. Iris/aperture controls depth of field, shutter controls motion blur.
 
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