Thanks for your comments ...
Frank <wijsmuller@xxxxxxxxx> wrote (see these shots)
https://www.flickr.com/groups/2669001@N21/pool/fmw
In my experience the A7 is capable of very sharp results with all MF
lenses, including zooms. Actually better then ever on a dslr.
However, you cannot trust 'focus peaking', but instead you need to
magnify the viewfinder image to get best results. It can be set to the
C1 button, allowing for an easy workflow.
Hope you try it again. For adapters that go to infinity, I can recommend
this brand
<https://www.ebay.com/itm/K-F-Concept-Adapter-for-Olympus-OM-Mount-Lens-to-Sony-E-Mount-NEX-NEX-3-a5000/222562152319?hash=item33d1bcef7f&_trkparms=ispr%3D1&enc=AQAEAAADAKvsXIZtBqdkfsZsMtzFbFsbX3WcW5fmB%2Fx7ZbaZTyex%2B7N0%2BWpDT7CkrShaA9NLikxQ%2Fy2WlLfNisTKPKvSCyx%2Bc7aQiHuQBERLQlb2krd2dvD%2B35Ne3mMvJAOpRU5ksOuLHHXF7v5hxgW72wqkTzjy0j%2Fc%2BHylFokBSAk1sNF4kYjICN4xfdgyNVAxv5Z68%2BYdeQz9Nq%2BjOjji7XE7%2BFGJHMBRoYEsfu5wZpWBJfp9tWsDWtuA7qBZIh7kLL2hK1BMQkWeIWXQhc5zWt2jeQWPFzqGpvbo4NHjVYO22rXoCScdHr5FKG91aF1N%2F9%2F3C7r94Bikj67hj1h1Q0sFIkTTL1SaQ1P9FUHPAqweJno5cf2AqwmfmJ01k7qlgdsMuB8VEPkusBlpxQYZxlSPZzqk3hv4z3jnBR8NJzr264A0Rkek7Hpr1miMDBMIo6xLD5i%2FZdQkBomZyCAEPkZVW%2BVQp2odRBGUSJ1dJAgKoDIw6RvZPhzeKgvI1db695i3o5fe8PDAAih3444nGZvZepcxCxdE2LnAzV2kPGjpKY6dMWxZym9WCQWuimaKDUciRbjVX9MM7eukcvh1PMQ6XztOE5wVlnrNMqMGRhWZEkt3ZyQexuhA%2FDAzwFlOwiUIFpjRPqZT2zY8bOVYyyi%2BhvYG7uiDXFFEs3Xn%2FHGmzM8e%2BlaCNybZNPrf65eNdg9cqhGVj4eKJBwbsv607I4956v3rY4DGBcxTqfNz%2FyYOt9a0voSWyH427W6qh0E%2FmNOpoauC4%2BYV%2BqKGXsr
OWgwec%2FvkhuoH7hUnjom7ZrmgonseBnNrVOvnEWCldh9n0ZMR56nySrE57JJD10qz9ZtSu10vT5B4gdnGogmGBjVdsPV2kz2KU80IS3cycGcvJuAbV3U0exfE0ZwDiGyeuZkadylODR4U3jdQh%2FzozUt%2BZ39GJOuXtAiQLHZbfkgzr8CuxAZvIaQND1u87M7nkAfMU096E60m1JcCyfUhFf0lLj5MFdGCPuBzwn8ytJKE%2BrLPQ%3D%3D&checksum=22256215231954cb828378844bdb8d2a6b30faf410d3
And Moose wrote;
Re: [OM] Zuiko manual lens options for Sony A7
Message-ID: <e69c60d8-d314-dbe4-07e1-ccbda9bc936c@xxxxxxxxx>
Content-Type: text/plain; charset=utf-8; format=flowed
On 8/11/2019 7:13 AM, Jim Nichols wrote:
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.
The third party folks don't always get it right, although you'd think
they would get the basic stuff right. I bought a Beschoi Pro OM=>Sony E
adapter.
I'd been using a combo of? combo of OM=>EOS and EOS=>E, which is fine at
infinity. I think I wanted the OM=>EOS for something else, so I bought
the direct? OM=>Sony E.
As I was intending to do some astrophotography, I wanted to be able to
simple focus to the stop for infinity. So I checked. All the OM lenses I
tried focused to infinity before the marking and stop! Compared it to
the OM=>EOS and EOS=>E I'd used before, it's 0.3mm shorter!
Bought a Fotasy adapter, same length as the combo, infinity just as it
should be, and returned the Beschoi Pro.
So, Brian, if you don't want to try to shorten it yourself, Fotasy is
another brand that works.
On 8/11/2019 6:38 AM, Frank wrote:
In my experience the A7 is capable of very sharp results with all MF
lenses, including zooms. Actually better then ever on a dslr.
My experience, as well, but I've not shot wider than 28 mm on the A7.
MikeG comments on problems with wider lenses, due to the depth of the
sensor stack, I think.
However, you cannot trust 'focus peaking', but instead you need to
magnify the viewfinder image to get best results. It can be set to the
C1 button, allowing for an easy workflow.
I do just that for Magnify. OTOH, I've found focus peaking to work well,
as well. Magnify, if on a tripod, peaking, if hand held, has worked for
me.
......................................
Thank you Frank and Moose.
Actually, the K-F-Concept
<https://www.ebay.com/itm/K-F-Concept-Adapter-for-Olympus-OM-Mount-Lens-to-Sony-E-Mount-NEX-NEX-3-a5000/222562152319?hash=item33d1bcef7f&_trkparms=ispr%3D1&enc=AQAEAAADAKvsXIZtBqdkfsZsMtzFbFsbX3WcW5fmB%2Fx7ZbaZTyex%2B7N0%2BWpDT7CkrShaA9NLikxQ%2Fy2WlLfNisTKPKvSCyx%2Bc7aQiHuQBERLQlb2krd2dvD%2B35Ne3mMvJAOpRU5ksOuLHHXF7v5hxgW72wqkTzjy0j%2Fc%2BHylFokBSAk1sNF4kYjICN4xfdgyNVAxv5Z68%2BYdeQz9Nq%2BjOjji7XE7%2BFGJHMBRoYEsfu5wZpWBJfp9tWsDWtuA7qBZIh7kLL2hK1BMQkWeIWXQhc5zWt2jeQWPFzqGpvbo4NHjVYO22rXoCScdHr5FKG91aF1N%2F9%2F3C7r94Bikj67hj1h1Q0sFIkTTL1SaQ1P9FUHPAqweJno5cf2AqwmfmJ01k7qlgdsMuB8VEPkusBlpxQYZxlSPZzqk3hv4z3jnBR8NJzr264A0Rkek7Hpr1miMDBMIo6xLD5i%2FZdQkBomZyCAEPkZVW%2BVQp2odRBGUSJ1dJAgKoDIw6RvZPhzeKgvI1db695i3o5fe8PDAAih3444nGZvZepcxCxdE2LnAzV2kPGjpKY6dMWxZym9WCQWuimaKDUciRbjVX9MM7eukcvh1PMQ6XztOE5wVlnrNMqMGRhWZEkt3ZyQexuhA%2FDAzwFlOwiUIFpjRPqZT2zY8bOVYyyi%2BhvYG7uiDXFFEs3Xn%2FHGmzM8e%2BlaCNybZNPrf65eNdg9cqhGVj4eKJBwbsv607I4956v3rY4DGBcxTqfNz%2FyYOt9a0voSWyH427W6qh0E%2FmNOpoauC4%2BYV%2BqKGXsr
>
adapter is the one which isn't working for me. at infinity.
I have ordered another (cheap) one from China, so we'll see how it goes.
I'll also look for Beschoi.
Today I tried the OM 85 - 250 and that was significantly less successful
with lots of colour fringing.
HOWEVER it is very encouraging to learn from Frank that his zoom lenses
yield sharp results with the A7. I'll try again with more care.
The problem just could be operator error :-)
I must also try the magnifier. I couldn't quite figure out the
instructions in the camera manual, so gave up.
Cheers, Brian
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