2 Problems with AF101

T

tet20

Active member
Hi,

I experienced 2 Issues with the AF101 on a Shoot..
Maybe some of you can shed some light on this for me..

Weird Shuttering Effect. Its like the Car jumps in the Picture.. I experienced it also during the Shoot on the LCD but thought its because of the cold (It was about 0 Degree Celsius) and the LCD Panel had Delay...but its also in the final Footage...

http://vimeo.com/19514051

White Balance Preset 5600.. when its overexposed it gets blue? is this normal?

http://vimeo.com/19516526

14-140mm
1/1000 Shutter
5600 White
400 ISO
720 50p ( i made 25 p in Cinema Tools to see the picture jumps more easy )
F3 Scene File

help would be appreciated.. I will also contact my Retailer but here in The Forum such things get solved pretty quickly ;)

thanx...
 
I see the shuttering effect - no clue as to what is happening there.

As for snow looking blue when overexposed & even sometimes underexposed; I've seen that on many other cameras in the past. Snow isn't actually white, and getting exposure bang on in that type of scenario is super critical.

G.
 
i have seen something akin to that stuttering effect on clips that were so long that the AF100 recorded them as two separate files. using Clipwrap, bringing them in individually caused the stutter, but bringing them in merged together as they were intended, cleared up the stutter.
 
First of all the blue is probably because the correct setting for white balance in those condition was probably about 7000 or higher even. Do a white balance instead of using the preset and Black balance at the same time.

I also wonder why you are using a 1/1000 shutter. This will cause strobing. I would try 180 degree shutter or 1/50 sec and dial in a lot more ND, maybe try 1/125 but not much faster than that.

Also I think your shots are a little over exposed. The jumping has something to do with how you conformed the footage. Try shooting it in 25P. And also try 24P over cranked to 50, then conform that to 25P in CT, if you are looking for slomo.
 
I had a shoot with my 7D and a Canon 100L IS lens and something similar happened. The image jumped back and forth and my conclusion was it's the IS function that's confused. Since your 14-140 has OIS I suspect this can be the cause.
 
Image stabilization coupled with tripod can cause that "jittering" like in your vimeo clip when panning. If you are on a tripod, you don't need to use any kind of in-camera, or in-lens image stabilization. You are already "stabilized". Having it on when mounted to a tripod can cause it to mistake your pan for unwanted motion. It will attempt to correct it, and the result is like in your vimeo clip.
 
Yes, I think both issues have been answered efficiently. But to reiterate on the WB, not correctly balanced. The fact is, its not showing 2 balances you have more white in the tight because your overexposing and the colour information is falling off.
 
The car jumping in frame doesnt have anything to do with the shutter ! The car jumps in the frame forwards and backwards on three occations. The op noticed it while recording as he mentioned.

Must be OIS try to shoot on a tripod to be sure that it's just that.

Did you play it back in camera after recording ? could be bad card .

Goodluck.
 
My vote is for OIS as well, though I've generally seen it on integrated lens cameras as a half-frame tearing effect. Could be the perfect storm of high-speed shutter mixed with OIS actually shifting you one fully rendered frame backwards.
 
I've seen exactly this sort of stuttering effect with a Panasonic HMC151 - working on a tripod with OIS on. Scared me silly until I worked the problem through; Panasonic stabilisation seems particularly sensitive to this specific circumstance.
 
thanx for the interest and the help...

although i have to put something right:

I choose to use 1/1000 Shutter.. i didnt have to.. I like it when you see every snow flake / piece of dirt crisp sharp... its a Saving Private Ryan Effect which i like.. Now, i am shooting for an Austrian Car Magazine for 3 Years now.. Mainly on a XL-H1 until now.. I probably did 300 Hours worth of 1/1000 Shutter Speed in Daylight Condition filming a Car going by me... Zooming an Panning at the same Time.. and to be honest.. This jumping effect never even once happened.. so it cannot be the high shutter i think.. judging from my past Experience.. its also not wrong conforming.. it happened during the shot.. i could see it on the LCD Display.. And its also in the original mts Files....

is it the OIS.. I dont know... I dont want to see such an Effect when I am Panning handheld.. so what does this mean.. i am not allowed to Pan fast with the OIS on? Thats not good...

I sometimes actually like leaving the OIS on, even on Tripod.. for Situations where I am heavily zoomed in and i can watch my Heart Pulse transferred from my hands to the Picture...

With White Balance it seems like a very fast Transition from properly exposed=white to overexposed=blue.. there seems to be not much headroom...
 
14-140 Lumix ... it has OIS..
thanks for the last few Posts.. I didnt read those while i was doing my last reply.... :)
 
I'm thinking dropped frames... 1/1000th shutter is fine, you should be able to shoot with and shake the camera around, pan violently, etc...

It just looks like missing frames. Low card write speed, the camera reaching it's limits in the cold, etc... could be the culprits?
 
I just looked at the video frame by frame, and there is definitely a combined frame where the skips appear.

This is what leads to the skip look.

The middle frame is blurry like it was combined from 2 frames. Look at the wheels.

car1.png


car2.png


car3.png
 
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I didnt do the Firmware Update for the lens or the camera yet.. I tried it once but it didnt work on my Mac.. And then i just didnt try again.... But i will try harder this Time..

The Card is a Sandisk Extreme Class 10 32 GB SDHC 30mb/s... it took 50 mbit with my Gh13 without complaints so i am not sure its the Card.. Also Playback In-Camera shows the same Symptoms.. Maybe it was the cold.. But 0 to max -1, -2 Degree Celsius?... I dont want just a Summer Camera...

So it didnt skip frames but rather combined 2 Frames in one.. Interesting.. I have to check that..

thanks for the Effort.. Thats better and way faster than Panasonic Support... I must say..
 
Two issues, two answers. The odd skipping of frames is most likely as Jason pointed out. OIS on while on a tripod. These do not play well together. The awful blue color is because of the bad color balance, I think Olaf pointed to a color temp that sounded much more likely around 7000K.

Best,

Jan
 
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