Experience with 4k video
From
Gary Eickmeier@21:1/5 to
All on Mon Mar 28 01:10:47 2016
David Ruether asked my to post for him.
Gary Eickmeier
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It's been a while, and here are some updates. I've owned a
GH4 for two years now (I preordered it when announced).
It has two failings when used as a 4K video camera, as does
my G7 also (but both are SUPER stills cameras!). I find the
30P maximum fps for 4K to be an unacceptably slow frame
rate (once you hit 60P, issues with "frame-blinking" with
high shutter speeds just go away!). Panasonic now has a
video camera with 4K-60P, and the up-coming GH5 will also
have that feature. The other problem is with "exposure
bobbling" during zooming that can occur while using many
stills lenses for video (possibly being solved with a new lens
I'm thinking of buying: a 12-60mm, 24-120mm-equivalent
zoom). The new 12-60mm is reputed to have a continuously
variable diaphragm instead of the usual 1/3rd stop "clicks",
normal for stills work.
Also, with the GH4, I compared image sharpness at various
settings for 1080-60P, and found some surprises: 200Mbps
1080-60P video (with All-I frames) did not look as sharp as
100Mbps GOP video (this was not surprising, since the
compression for the latter is more efficient) - and also that
50Mbps1080-60P video looks VERY close in sharpness to
100Mbps video, and very noticeably better than 28Mbps
AVCHD video. As a result of this, I have settled on 50Mbps
1080-60P for my video, and this can now be put on disk as
1080-60P AVCHD (and it looks GREAT, and noticeably better
than 24/30-P or 60-I!), and it also archives well at 135Mbps
1080-60P. I'm eager to try 4K-60P, though...!;-)
BTW, since I started this about 3.5 years ago, I've shot almost
200,000 stills with this great, light Panasonic gear, and I finally
just bought a "serious" printer... I'm "about" to put up about
two dozen "shooting-concept" pages of photos rather than
grouping them by the lenses used (it's been a S-L-O-W process
sorting and processing huge numbers of photos, so I don't know
when this will begin to be up on my site...). But for now, I am
still adding photos at:
www.david-ruether-photography.com/MFT-Lenses.htm
--David Ruether
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