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

Subject: Re: [OM] Zuiko manual lens options for Sony A7
From: Jim Nichols <jhnichols@xxxxxxxxxxxxx>
Date: Sun, 11 Aug 2019 09:13:01 -0500

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

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