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: "Wayne Harridge" <wayne.harridge@xxxxxxxxxxxxxxxxxxx>
Date: Mon, 12 Aug 2019 14:10:59 +1000
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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