Ghosting and Trails?

Neil Burner

Neil Burner

Active member
After doing some camera test I am noticing ghosting and image tails in my footage. It shows up when I pan the camera and with slow movement of objects in the scene. It is much more noticeable when on high contrast(light to dark) edges. I can see it in the cameras LCD and also when play through the HDMI port and in FCP. Is anyone else seeing this in there footage?

Here is a still of what I'm talking about. Notice the door frame also the red handle on the lower left hand side.

af100.png


any input would be greatly appreciated. thanks.
 
Looks like motion blur. Increase your shutter speed perhaps? Or get an interlaced camera instead to do your quick pans while still retaining crisp edges.
 
Looks like motion blur, which is perfectly acceptable unless you're trying to pull usable stills from moving images :)
 
Are there any noise reduction settings that may be on? I don't have the camera so I don't know what menu options it has, but on my previous canons, they have 2 NR (noise reduction) setting, if on can cause trailing and ghosting.
 
I see what you are talking about, and that's not regular motion blur. On the wall to the left of the door frame there's a "pre" or "post" blur going on... as you said, ghosting. Not super nice looking... last time I had this issue with it was due to noise reduction being on.
 
Wait,

I just looked closer, and I see what you are talking about... to the left of the door frame and the red handle I can see an 'after image'. In the Alpha Romeo footage, there was noting like this. What are your shutter settings? Is DRS on?
 
Thanks for the responses. Shutter was at 180d and DSR is off...Its not motion blur...there is no noise reduction setting with in the camera that I know of. ISO was at 1600. It seems to be a pre image. Its really noticeable on all my shots that have hard edges with dark and light contrast. I will post some more images soon...I hope someone with another af100 can chime in and let me know if they are experiencing this as well.
 
its not a fast pan at all. you can see it if you wave your hand in front of the camera it looks almost like video feedback.
 
Not trying to be critical here, but I see a poorly lit out of focus hand and again a poorly lit handheld swish pan. If you do not want motion blur in your shots, add some light and change your shutter.

All the Best!
 
If this is a symptom of noise reduction then maybe some auto noise reduction starts kicking in at higher ISO's like the one you are using. Do you see the ghosting at lower ISOs?
 
Thanks David never thought of that! Astigmatic I think you might be right....I did a test @ 200iso, 640iso and 1600iso and only shooting at 200iso seem to remove the problem. Thats really to bad if thats the case...
 
here is a canon 7d frame and a af100 frame both at 1600iso. canon at 1/60 panasonic at 180d shutter.

7d:
7dbars.png


af100:
af100bars.png
 
hmm, very strange. However it's not something we will really notice in motion so im not too worried about it.
 
PaPa said:
hmm, very strange. However it's not something we will really notice in motion so im not too worried about it.
Click to expand...

As far as I can tell from these stills, it looks very much like the ghosting/motion trails that have been much lamented on the HPX370. Google it and search DVinfo. These issues led Panasonic to release a firmware update that allows you to dial down the noise reduction. It will be interesting to see if we have a silar issue on the AF100. This evidence suggests we do. Frankly, though this doesn't seem anywhere near as severe as on the HPX371 I tested recently. I'll check on this as soon as our AF100 arrives...
 
Astigmatic I think you might be right....I did a test @ 200iso, 640iso and 1600iso and only shooting at 200iso seem to remove the problem. Thats really to bad if thats the case...​
Click to expand...
I was reading the manual. Detail coring is noise reduction. Try messing with detail coring I guess.​
 
Just wondering if you have tried shooting your "tests" focussed, lit and properly exposed?

I just dont see any value in squirting off a random shot of absolutely nothing. It does not give me any faith in the testers ability to use the camera or set it up and that therefore invalidates any of the results posted.

Test doesnt give the camera any chance to shine at all. ( "You cant make chicken pie out of chicken manure")

BTW: What lens is usede in the tests?
 
Shooter-

While we may not get any quantifiable results from this test I think it shows pretty clearly what can happen in real-world scenarios. The ghosting here is certainly visible, and while some controlled testing may help us isolate the issue, this informal observation is not without value.

It's not a big enough issue to really change much, but it never hurts to know the limitations of whatever system you're working with.
 
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