Stutter/strobing on LCD

[Ed Watkins]

Hi maybe I'm just missing something here but:

I just got my first chance to test out my cam since I got it back from the CF/sound update, and something is very different with the way my LCD is displaying feed from the camera.

I know you get some stutter/strobe when panning in 24 fps, I shot for the last year in 24fps, but now I am seeing a huge amount stutter/strobing when I do any kind of move, no matter how fast/slow. It almost feels like the camera isn't displaying the images fast enough.

I noticed that build 17 changed up the shutter options, and I'm running in "normal" mode 24fps 1/48sec.

When I turn on "open gate" (upping the LCD refresh rate) the image is vastly better, but still has some stutter.

EDIT> I just tried on 23.98, 24 , 25, 29.97 fps and the stutter/strobing is just as bad on all of them with out open gate on.

Is this normal now with the upgrade and build 17?
I never had this issue before the update on build 16.
:help:

 

[mikeburton]

That doesn't sound right ed. I would load in the build 18 firmware and see if it goes away. If it doesn't go away contact RED.

 

[Ed Watkins]

O.k,
So I updated to build 18 and it didn't make any real difference.
I shot some test footage to show what I mean, the stutter/strobe is less noticeable on the compressed footage than the original.

Am I going crazy? I'm pretty sure this isn't what the footage looked like before the upgrade.

The shutter is on "normal" 180 degrees (24fps 1/48th) I did a pan at the ASC recommended speed for 17mm lens of 9.9secs for 90Deg pan, and it still stutters.

Can you guys take a look and let me know what you think?
ASA 320, 5600K, 17mm, 24fps, 1/48th

Moving hand in front of locked down camera
http://naturalscinema.com/RED/A002_C006_0222SK_RedMag_small.mov (6mb)

Pan at 9.9deg /sec
http://naturalscinema.com/RED/A002_C009_02224B_RedMag_small.mov (3mb)

Walking in front of camera
http://naturalscinema.com/RED/A002_C013_0222TJ_RedMag_small.mov (5mb)

Hand held pan
http://naturalscinema.com/RED/A002_C019_0222H6_RedMag_small.mov (2mb)

Hand held shot of tripod head
http://naturalscinema.com/RED/A002_C021_022229_RedMag_small.mov (2mb)

 

[Ed Watkins]

Any one think the footage I posted looks odd?
Could really do with some feedback on this before I see about sending my RED back to get looked at.. again.

 

[Nick Gardner]

I thought it looked perfectly normal.

Nick

 

[mikeburton]

Yeah, that doesn't look out of the ordinary to me.

 

[Nick Gardner]

It was snowing, and LCDs can act really hinky when they are cold..........

Nick

 

[Ed Watkins]

Hmm.. I'm not convinced, it looks worse full res. No one thought the moving hand had a pronounced judder to it?
I think I'll try and find a local cam owner to do a side by side comparison.

Thanks for the feed back though, maybe I am going crazy.

 

[David Wyatt]

There are apocryphal reports that strobing got slightly worse with Build 16 (I'm not so sure - it's hard to be scientific about it unless you're able to repeat a before & after test of exactly the same subject/situation/conditions). I can't see a reason why strobing would get worse in between firmware builds? Obviously the strobing issue looks a lot worse on wider lenses & in high contrast situations (e.g. dark object against a bright background). Interestingly a lot of the recent camera tests which productions have been doing with our camera have been to assess how acceptable the Red strobing issue is to them and their needs. I think that can be a bit meaningless unless you do a side-by-side with a rival camera since strobing is a universal issue. Going to print also seems to slightly take the edge off any strobing.