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  • Hey all, just changed over the backend after 15 years I figured time to give it a bit of an update, its probably gonna be a bit weird for most of you and i am sure there is a few bugs to work out but it should kinda work the same as before... hopefully :)

RED Speed control box Please

parisrem said:
No has mentioned the fact that if everything is shot at, say, 120 fps 180 degree shutter, the shutter speed will be 1/240 sec. Making the stuff slowed down/sped up to normal speed 24fps in post have the stuttery motion
T
Click to expand...



Um.

Read my first post.

Thats EXACTLY what my first post was alluding too and what people still don't seem to get.

You can't always do it in post. It does look different to simply shooting everything at a higher frame because the motion blur from the higher shutter speed makes temporal information (motion) look DIFFERENT than if it's shot at the normal shutter speed.

The motion blur(shutter speed) is different at different frames rates so when you re-time a 120FPS shot back to 24 it LOOKS DIFFERENT to a 24 FPS shot at 24fps.

Now I'm not advocating for this this feature, and I haven't done an in-camera ramp for some time.

Im just pointing out to you "fix it in post" types that it's not always true to say it looks the same, which some of you still seem to advocate.

Just because no-one does it that way anymore doesn't mean no-one will want to at some point.

Speed ramp fascists need to lighten up and realise that there ARE subtle differences and it's valid to want to do it in camera.

jb
 
Read harryclark's post. Even on film cameras when you ramp you have to start with a small shutter to compensate for the exposure.

Now wit the Red you have another option. Ramping the ISO as well as the shutter angle. This would allow you to shoot 24 fps with a 90° or 180° angle and low ISO. Then during the Ramp the ISO adjusts as well. This way you could kill one to two stops at the beginning of the Ramp.

Simon
 
harryclark said:
So there REALLY is no difference whether you do it live or in post except, as others have noted, you can more thoroughly control it in post...
Cheers,
Harry
Click to expand...

Only if you choose to use shutter angle to compensate for the exposure change. You don't have to do it that way.

It can as easily be done using iris to compensate for the exposure change. This was the way we did it before electronic shutters. And the way someone might still want to do it for the reasons I've already laid out.

Sorry. But there REALLY IS a difference.

jb
 
John Brawley said:
You don't have to use shutter angle. You can do it with an iris pull.
Click to expand...

I haven't seen that box for a Red yet!

Pulling iris while maintaining 24fps sync is the only reason I can see for ramping in camera.

Check out the work of Michael Ballhaus in movies like 'The Age of Innocence" to see why iris ramps are an awesome technique.

The difference here is that an iris ramp is actually changing what is being recorded. Different iris setting have different depths of field. You can't recreate that in post. Speed ramps, on the other hand, can be done in a nice comfy editing suite.
 
A great use of those USB ports on the rightside. I can't wait for USB /Bluetooth/ enabled Red! I could then send metadata to the sound team or script suppy!
An varispeed/Shutter unit would be nice but I'd like to use something like a 2 channel FIZ with my the RED I'm working with.

Finner does have point and I do agree with him. I can't wait till we have 4k 60p enabled......
 
John, yes, of course, you can do it with an iris control. And I've even done it manually in a pinch. Pretty good too! ;)
But I simply meant to illustrate that if you were to use the shutter to compensate, the effect is identical to the post method Finner and others are describing.
And CrewPix, yes, the depth of field shift effect is REALLY cool, in my opinion, and could be used in a very subtle way. Doesn't have to be showy. Not that Ballhaus is showy...
Cheers,
Harry
 
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