Clarification needed about MX skew???

[Martin Stevens]

Hello Jim and the Red Team,

Do contemporary motion picture film cameras have a Rolling Shutter issue?

The reason I ask is that there is a test for Rolling Shutter on Ryan Walters website.

Click on this link.....
www.ryanewalters.com/Blog/files/The_Clash_of_the_Titans.html

It appears that the new Red MX sensor still has a slight Rolling Shutter issue.
But I am confused, because if the MX has a film like refresh rate, then does this mean that
film cameras have a Rolling Shutter issue as well?

Also, do you know if the MX sensors refresh rate changes when a different Redcode rate is used?

Again....
If you were to pan an Arri movie camera back and forth
horizontally very quickly, would there be skew like the skew
depicted in the MX test footage from the link I provided?
Would there be any skew?

According to what I’ve read online, the M sensor has a
9 ms refresh rate, the MX a 5 ms rate, and film has a 4 ms rate.

I'm not looking to fault MX, I'm just trying to understand if traditional
film camera also have low Skew.

If film and the MX are only 1 ms apart in timing, then why does the footage shown
at the provided link have so much skew?
:nonod::nonod::nonod:

 

[Patrick Tresch]

Your link is broken.

Pat

 

[Martin Stevens]

Your link is broken.

Pat

Link should work now.

 

[David Rasberry]

Yes film cameras have similar rolling shutter issues. The 5ms refresh rate is the maximum time it takes the camera to read a full frame and reset for the next frame. Under most normal shooting conditions it should not be a problem.

 

[Martin Stevens]

Yes film cameras have similar rolling shutter issues. The refresh rate is the maximum time it takes the camera to read a full frame and reset for the next frame.

I'm trying to find out if FILM has a much skew as the video from the link.
I already know what skew is.

Does anyone have a link to film footage skew from a modern
180 degree shutter Arri?

 

[Andrew Gentle]

Jim said that MX has a 5 ms read reset time, M has 9 ms and a film rolling shutter is equivalent to 4 ms.

 

[Martin Stevens]

Jim said that MX has a 5 ms read reset time, M has 9 ms and a film rolling shutter is equivalent to 4 ms.

Yes.....and those figures are in my original post.

 

[Andrew Gentle]

Yes.....and those figures are in my original post.

Haha, oops. Sorry about that. Way to skim read...

 

[Jannard]

We have temporarily rolled back the clock speed (read-reset time) for the M-X upgrade cameras to work on several issues... calibration being one. As soon as we fix all the "stuff" we'll roll up the clock speed again. As of today's build, you will get skew "slightly better than the M sensor". Soon, that will go back to where it was when we showed M-X at RED Day. EPIC will be released with 5ms out of the box.

I would have posted this before... but I forgot. Sorry about that.

Jim

 

[Roberto Lequeux]

We have temporarily rolled back the clock speed (read-reset time) for the M-X upgrade cameras to work on several issues... calibration being one. As soon as we fix all the "stuff" we'll roll up the clock speed again. As of today's build, you will get skew "slightly better than the M sensor". Soon, that will go back to where it was when we showed M-X at RED Day. EPIC will be released with 5ms out of the box.

I would have posted this before... but I forgot. Sorry about that.

Jim

That makes sense now. Thanks!

 

[Martin Stevens]

We have temporarily rolled back the clock speed (read-reset time) for the M-X upgrade cameras to work on several issues... calibration being one. As soon as we fix all the "stuff" we'll roll up the clock speed again. As of today's build, you will get skew "slightly better than the M sensor". Soon, that will go back to where it was when we showed M-X at RED Day. EPIC will be released with 5ms out of the box.

I would have posted this before... but I forgot. Sorry about that.

Jim

Thanks Jim.

This has clarified the issue.