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Is there a motion mount that doesn't block 1 stop at minimum?

Y

yves d

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Reds motion mount has a minimum of 1 stop. Are there any 3rd party mounts that don't?
 
you don't want a motion mount unless the camera is mounted on a drone or in a helicopter gimbal and even then you don't want one if your shooting at night.
 
Remington Chase said:
you don't want a motion mount unless the camera is mounted on a drone or in a helicopter gimbal and even then you don't want one if your shooting at night.
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I use the motion mount all the time for daytime outside shooting. If I am going into low light situations I don't use it. Its a pretty key thing to have for shooting skiing and action sports IMO. Really handy on the gimbal also.

I sure hope RED creates a motion mount that goes to zero stops and sooner then later.
 
It may be the variable ND aspect of the Red Motion Mount that requires a minimal stop loss -- I don't know how that works with how it creates a global shutter effect.

I wasn't aware that ARRI had a motion mount -- I can't find anything about one online.
 
yves d said:
How does ARRI do it?
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They use internal mechanical glass NDs behind the lens on a few of their camera models.

The Motion Mount is RED exclusive tech.
 
The motion mount is also a linear polarizer which obviously absorbs some photons. It works by strobing in either hard or soft modes at your selected shutter speed in front of an 'opengate' sensor, in sync with the sensor draw at the selected frame rate.

Arri has internal ND or a physical spinning shutter in some models, neither are the same thing as the motion mount.
 
Does Sony have the answer ? What is the nature of the permanent electronic variable ND that Sony uses on the FS5 ? Is this ND permanently engaged or does it swing into position when turned on? I would be surprised if Sony went with a ND system that affected low light performance?
 
On the FS5 the variable ND is a filter that swings into place mechanically. It is probably some sort of LCD glass. When it is in front, you set the amount of ND with a dial (or with presets).

When you rotate it back it is out of the way.

Best ND system I ever saw/used and I wish this will become the standard.
 
An internal ND system is a separate issue than a motion mount that simulates a global shutter. Sure, if all you want is an internal ND system that has no stop loss at zero ND, then you design something that slides or rotates filters in front of the sensor. But a physical piece of glass in front of a sensor isn't going to create a global shutter effect (maybe a mechanical shutter could.) Either way, you'd need more space inside the body than a polarizer variable ND system would take. I thought the original question was wanting a motion mount that doesn't lose a stop at minimum, not just asking for internal ND filters.
 
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David Mullen ASC said:
An internal ND system is a separate issue than a motion mount that simulates a global shutter. Sure, if all you want is an internal ND system that has no stop loss at zero ND, then you design something that slides or rotates filters in front of the sensor. But a physical piece of glass in front of a sensor isn't going to create a global shutter effect (maybe a mechanical shutter could.) Either way, you'd need more space inside the body than a polarizer variable ND system would take. I thought the original question was wanting a motion mount that doesn't lose a stop at minimum, not just asking for internal ND filters.
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Ahh my mistake. I had no concept of how the motion mount worked and mistakingly assumed it was similar to arris or canon's internal nd system.

I guess now it would be a dumb question to ask if there is an adaptor of some sort that acts as an internal nd system considering how much space the glass would take.

Any tips or advice for quick ND changes when working on documentary with 4x5.56 nd filters?
 
Kippertie does have ND inserts that you can put between the lens and sensor inside the camera.
 
It would actually be longer times to swap as it uses the OLPF tray so you'd have to removed the lens and mount. But, if you anticipate only using one density would save time swapping lenses if you can forgo the mattebox. Very situational.

There are other benefits, like reduced air/glass interfaces for reflections / ghosting and weight. I don't have the kippertie system myself but I think it's a great option to have!
 
Douglas Underdahl said:
https://www.youtube.com/watch?v=sXC2foO9ULk

https://www.youtube.com/watch?v=dIBO2thl56o&t=4s

Been using this for a while now. Hoping for adoption by RED (as in the Nikon mount for Red One) but didn't happen. Works great. Does shift focus very slightly but most users here eye focus anyhow.
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Aw man, this in a EF or PL mount is exactly what I'm looking for. In an ideal world the slides would be servo-driven and controllable from the camera, but I'd take a manual version.
 
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