From: Alfred Molon <alfred_molon@yahoo.com>
Subject: Re: DSLR resolution suffers by about 20% when electronic shutter not used with mirror up
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From: Alfred Molon <alfred_molon@yahoo.com>
Newsgroups: rec.photo.digital
Subject: Re: DSLR resolution suffers by about 20% when electronic shutter not used with mirror up
Date: Sun, 28 Jan 2018 22:43:15 +0100
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In article<fa5889f0-fc9a-4751-92f3-b94b6d0c9176@googlegroups.com>, 
RichA says...
> 
> On Sunday, 28 January 2018 00:41:23 UTC-5, Alfred Molon  wrote:
> > In article<p4j44t0gah@news6.newsguy.com>, PeterN says...
> > > 
> > > On 1/27/2018 6:28 PM, Eric Stevens wrote:
> > > > On Sat, 27 Jan 2018 10:57:29 +0100, Alfred Molon
> > > ><alfred_molon@yahoo.com> wrote:
> > > > 
> > > >> In article<oagn6d9eg96l70cbhee8jj5jfnqlbdnt6q@4ax.com>, Eric Stevens
> > > >> says...
> > > >>>
> > > >>>> With the E-M1 II in high res mode (80 MP) it's not sufficient to disable
> > > >>>> the mechanical shutter (i.e. use the electronic shutter). You need a
> > > >>>> wireless shutter release and you also have to disable the autofocus,
> > > >>>> because the AF motor movements in the lens generate vibrations.
> > > >>>
> > > >>> And don't forget the concrete foundations.
> > > >>
> > > >> Doesn't have to be concrete. Can by anything, also sand or mud, as long
> > > >> as it doesn't move.
> > > > 
> > > > " ... as long as it doesn't move"  That's why I always use concrete.
> > > > 
> > > 
> > > I've seen idiots set up a tripod on boats.
> > 
> > It eliminates some motion (camera shake due to shaking hands).
> > -- 
> > Alfred Molon
> > 
> > Olympus E-series DSLRs and micro 4/3 forum at
> > http://tech.groups.yahoo.com/group/MyOlympus/
> > http://myolympus.org/ photo sharing site
> 
> High frequency shake.  Does nothing for low-frequency ocean motion, vibration from engines, etc.

Actually the vibration from the engines is high frequency shake. The 
body movement is more of a low frequency thing.
-- 
Alfred Molon

Olympus E-series DSLRs and micro 4/3 forum at
http://tech.groups.yahoo.com/group/MyOlympus/
http://myolympus.org/ photo sharing site