TAKO. INTERNET SEIT 1996.
Olympus-OM

Re: [OM] Zuiko manual lens options for Sony A7

Subject: Re: [OM] Zuiko manual lens options for Sony A7
From: Frank <wijsmuller@xxxxxxxxx>
Date: Mon, 12 Aug 2019 10:04:57 +0200
Thanks again Jim, and Wayne, I'll let you know how it turns out.

Frank


Op ma 12 aug. 2019 om 06:11 schreef Wayne Harridge <
wayne.harridge@xxxxxxxxxxxxxxxxxxx>:

> Probably a good idea to rotate the adapter a bit from time to time as
> you're
> wearing it down.
>
> ...Wayne
>
>
> > -----Original Message-----
> > From: olympus <olympus-
> > bounces+wayne.harridge=structuregraphs.com@xxxxxxxxxxxxxxxxx> On
> > Behalf Of Jim Nichols
> > Sent: Monday, 12 August 2019 1:27 AM
> > To: olympus@xxxxxxxxxxxxxxxxx
> > Subject: Re: [OM] Zuiko manual lens options for Sony A7
> >
> > Frank,
> >
> > Keeping the surface flat is not a big problem if you use thin emery paper
> and
> > wrap it around a sheet of steel or aluminum, lay it on a flat table, and
> move
> > the adapter part across the flat abrasive material.
> >
> > Jim Nichols
> > Tullahoma, TN USA
> >
> > On 8/11/2019 9:54 AM, Frank wrote:
> > > With these adapters, usually the bayonet fitting part (at the lens
> > > side) is a separate chrome plated part attached with screws on the
> black
> > tube.
> > >
> > > I guess you can sand the black tube a bit and reattach the chrome
> > > plated part. However, keeping it perfectly flat could be a challange?
> > >
> > > Hmm..  now that I think about it, I have a slightly too long Lens
> > > Turbo adapter myself which I could fix that way, maybe. Would the
> > > distance between Lens Turbo elements and the sensor be less critical
> > > compared to the elemens and the lens? Does anyone knows?
> > >
> > >
> > > *Frank *
> > >
> > >
> > > Op zo 11 aug. 2019 om 16:13 schreef Jim Nichols
> <jhnichols@xxxxxxxxxxxxx>:
> > >
> > >> Brian,
> > >>
> > >> I ran into a situation like that with one of my first adapters, where
> > >> the adapter was just too thick to allow me to get to infinity.  This
> > >> was a threaded adapter, and I simply polished the surface with emery
> > >> paper on a flat surface until I got it right.
> > >>
> > >> Won't work with a bayonet mount, though.
> > >>
> > >> Jim Nichols
> > >> Tullahoma, TN USA
> > >>
> > >> On 8/11/2019 5:13 AM, Maggie wrote:
> > >>> Hello all, Brian Swale here.
> > >>> I've been trying various OM Zuiko lenses on my "new" A7, and the
> > >>> results are rather mixed.
> > >>> Firstly, I have come to the conclusion that the nice lens adapter I
> > >>> bought has one significant secret flaw - it seems to 'not quite'
> > >>> allow lenses to focus to infinity. Where I am shooting tests from (
> > >>> our bedroom balcony) in the distance at about 5 km (3 +- miles) are
> > >>> large hills, and all the way back to the camera are intermediate
> targets.
> > >>>
> > >>> So, using the hot-focus indicator in the screen, those hills show as
> > >>> being out of focus and the detail of the downloaded images also
> > >>> shows that. So I need to buy another which is a pity as the build of
> > >>> the adapter I have is otherwise very nice.
> > >>>
> > >>> Secondly, indications seem to be that only prime lenses will give a
> > >>> sharp image. The 50/1.8 and the 100/2 are excellent. The jury is
> > >>> still out on the others - I will try new tests with the camera on
> > >>> tripod this coming week. I had thought that the 35-7-/3.6 excellent
> > >>> film zoom would make a great versatile walk-around lens, but so far
> > >>> the images disappoint. Similar for the 35-80 and the 35-105. The
> > >>> 75-150 disappointed. The 21, 24, 28, 40 and 85 need re-testing and I
> > >>> haven't got to the 135 and 200 ( and larger) yet.
> > >>>
> > >>> We are still in winter with fresh snow on the hills to give some
> > >>> contrasty details.
> > >>>
> > >>> Cheers, and back to lurk mode.  Brian
> > >>>
> > >>> ---
> > >>> This email has been checked for viruses by Avast antivirus software.
> > >>> https://www.avast.com/antivirus
> > >> --
> > >>
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