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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: Sun, 11 Aug 2019 16:54:28 +0200
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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