Thank you for your reassuring reply regarding Chinese made Sandisks (sorry for wrong spelling). I have always found the product
first rate. wolf_1

Recently I purchased from Amazon two of the 64GB cards, one a Yellow Extreme card and the other a black 64GB Extreme PRO card, they are 90MB/s and 95MB/s read
speeds respectively. They were each sent in Large yellow envelopes. I have not opened the black card envelopes which contain the plastic box which contain each card.
This is because the back of each card has the words under the warranty guide "30 years Germany and regions not recognizing lifetime limited". In very small print
at the bottom Made in China! I have purchased some one hundred Scan Disk SD cards in my Digital Camera life made in the USA or Taiwan never in China until now.
I have read Amazon Customer reviews in the last year or so warning of Chinese "knock-offs". I would be glad of any advice or knowledge you could share with me.
Thanks wolf_1

I have been considering the A6000 for Airshow videos but was
discouraged by the great expense of long telephoto lenses. But
I was impressed by the A6000 Manual by David Busch,buying it
from Barnes and Noble. He has the best explanation of video set
-up and the rolling shutter problem that I have read.It has led to
me experimenting with 60frames/sec and shutter speeds of
1/250th sec. or greater with my Canon 70D and STM lenses. I hope this will solve the autofocus problem I described in my Sept 2015 posts. I am waiting for the cloudy,poor visibility and the
low ceiling conditions to try at the local airport. I would welcome
any suggestions from 70D video shooters. Increasing the shutter
speed was suggested by a 7D II user to my previous posts.

Sorry have put my question to you two posts down.

What long reaching telephoto lens to 800mm do you use on your Olympus OMD EM-1, it could be a good idea for me. I only
purchased the Canon 70D for its fast, quiet focussing in movie
mode. But the auto-focus options are very limited in live-view
mode.

That is what I basically did by switching the lens to manual and
prefocussing on an object far away at approximately the same distance and taking the movie. On further study I cannot come
up with a camera/lens combination that could have auto-focussed in the gloomy poor weather conditions. I obtained some
reasonable movies of WWII aircraft flypasts. I would have loved
to have had an F2.8 400mm lens to get closer with more light
but now one is talking expense, weight of the gear,panning etc.
I still have a hunch that a light mirror- less camera with a good
telephoto and large format would be a better choice for airshow
videos but I have insufficient knowledge of such a camera.

Yes one seems to have sacrificed a lot from days of using my
Nikon 8008 35mm film camera and a Nikkor F8 mirror lens, I
never had trouble photographing the moon always in focus but
coping with the moon's slow movement. I have also developed
Agfa color film years ago with a Rolliecord V never any trouble
focussing, even although the image was upside down, thanks to the hood over the screen. My finest pictures were with a Nikon F
with Nikkor glass lenses on Kodachrome 25 at the Grand and
Bryce Canyons, always in focus. When projected 8 feet wide with
my wide-angle Leitz Pradovit(1963) projector the pictures are 3dimensional presumably due to the multi-layers of the gelatin. Thank you all for your posts, back to my glass lenses.

In the last few days there have now been two posts concerning
focus with live view with a SLR near infinity, namely my own
difficulties with videoing at an airshow using a Canon 70D which
supposedly was specially designed for fast focussing ,and now a
a most recent post on focussing on the moon, with a Nikon D7100 SLR for a still shot (although it is still a moving object but very slowly).
Can any mirror-less camera expert(s) provide more successful
experiences under similar circumstances?

My apologies again I am confusing Nikon designation with Canon. It was the Canon 70D with 18-135mm lens that I was
using at the air show taking video action of aircraft flying past
at 300-400mph in conditions that only professional pilots can cope.

My camera is a D70, putting a II after it was my typing error. I think it is clear that the camera with its cross-type sensor could not distinguish between the dark greys of the the clouds and the
silvery grey of the plane shape in such murky conditions, maybe
raining too at the flypast altitude.The shutter speed is set to 1/60th sec for the 30 frames/sec speed. But there is also the moving edge of the plane surfaces to help focus. One also needs
to have a lot of focussing points to keep the whole plane covered
in the LCD screen. Not easy also using a loupe magnifier because
of my eyesight and the dim LCD screen in the poor light. Maybe
the mirror less camera IS the answer and abandon live view and
SLRs.

Thank you for your reply,sorry for the lens mistake it was the 18-
135mm STM. I have read two manuals on the Canon AF modes
but with the conditions, I had the camera in auto mode. With my
small sensor Panasonic LX7 and LX100 mirror- less cameras I have not run into focussing problems like I described in my post.
After reading many reviews I was led to believe that the Canon
D70 was the larger format answer to videoing air shows
with its special sensor and its fast stepper-motor driven lens.
I am an amateur photographer not a professional. Since the
tragic accident recently in Shoreham UK one is now much further
away from the planes. Please list the better cameras for air show action, are they mirror-less, Sony??

I have both Nikon750 and Canon D70II cameras. The latter was chosen for its quiet fast -focusing in video with STM lenses. Re-
cently at an airshow in low-ceiling cloud conditions, gloomy and
no sun the camera would not hold focus.Quickly, I switched the
24-135mm lens to 'manual' using the focusing ring to focus at
infinity. Any suggestions on better coping with these conditions.wolf_1