Known issue with newer and still lenses generally. The GH2 AIUI can be
adapted to a rather wide range of lenses with aperture rings and a
number of lenses can be/have been adapted to a clickless life. A quick
google..
https://www.google.ca/search?q=lenses+aperture+clickless&ie=utf-8&oe=utf-8&rls=org.mozilla:en-US:official&client=firefox-a&channel=fflb&sei=rUMcUOCUNarHigL_n4HoAg&gbv=2
D(back to lurking in the shadows, busy, busy, busy)D
On 8/3/2012 12:13 PM, johnrobmoore wrote:
>
> I hope you pointed out to the DP that it might not be such a good idea
> to adjust the aperture DURING a shot that may be used! And you can
> borrow my Artist Color Panel to emphasize the point if you think it
> will help. ;-)
>
> --- In Avid-L2@yahoogroups.com <mailto:Avid-L2%40yahoogroups.com>,
> Michael Brockington <brocking@...> wrote:
> >
> > Thanks to folks who chimed in on this thread. It turns out the
> > issue is not due to autoexposure on the GH2. Rather, according to the
> > DP, "the lens used didn't have an aperture ring so the aperture had to
> > manipulated via the camera and not the lens - and unfortunately the
> > system has click stops so isn't very smooth."
> >
> > The BCC flickerfix effect wasn't much help with fixing the problem.
> >
> > Sapphire's flicker removal filter worked quite well for smoothing
> > out single exposure jumps, where the change occurs over 1 frame. Where
> > the shift took 2 frames, the jump was still pretty visible. Problem
> > with this footage is there are about 8 exposure changes over the course
> > of 10 seconds, with the camera moving. Using the sapphire plugin to
> > match to exposure levels at the end of the shifts, for instance, means
> > the footage at the start of the shift gets compressed to a very narrow
> > range of luma values. It can be stretched out again via CC, but is very
> > degraded -- tons of banding. I think this could be minimized by working
> > in a higher bit-depth. It seems like the Sapphire filters support
> > floating point in After Effects, so that might be worth a try.
> >
> > Cheers,
> > --Michael Brockington
> >
> >
> > On 12-07-31 11:50 AM, Michael Brockington wrote:
> > >
> > > I have some footage from a Panasonic GH-2. When it pans from light to
> > > dark areas, it shows a very step-wise change in exposure, rather
> than a
> > > smooth change. Exposure jumps from 1 setting to the next over 1-2
> frames.
> > >
> > > Is this a known issue with the camera, or more of an operator issue?
> > >
> > > Has anyone come across a good solution for smoothing out this kind of
> > > thing? I suppose I could use add-edits at the jumps with CC to try to
> > > match the 2 exposures, but it looks fairly difficult to get the
> match to
> > > be imperceptible when the shot is continuous.
> > >
> > > Any magic plugins to recommend, either inside Avid, or using some
> other
> > > software?
> > >
> > > Thanks,
> > > --Michael Brockington
> > >
> > >
> >
> >
> >
> > [Non-text portions of this message have been removed]
> >
>
>
[Non-text portions of this message have been removed]
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