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You are here: Home / The Last Word / Kolari Vision thin-stack mod on a7II — Zeiss 35/2 Biogon-M

Kolari Vision thin-stack mod on a7II — Zeiss 35/2 Biogon-M

July 23, 2015 JimK Leave a Comment

This is part 4 in a series of posts on a prototype of the Kolari Vision thin-stack sensor modification for the Sony a7II. The series starts here.

The Zeiss 35mm f/2 Biogon-M is a close-but-no-cigar lens on the a7x cameras. How does it do after the sensor stack has gone on the Kolari diet?

The scene, at f/2:

Standard
Standard
Kolari
Kolari

An aperture series like the ones in the last few posts, ISO 100, Lightroom defaults except for Daylight white balance, enlarged 3:1, upper right corner:

 

Standard f/2
Standard f/2
Kolari f/2
Kolari f/2

Neither one is great, but the Kolari one is better.

Standard f/2.8
Standard f/2.8
Kolari f/2.8
Kolari f/2.8

The Kolari performance might be acceptable for some uses.

Standard f/4
Standard f/4
Kolari f/4
Kolari f/4

Now the Kolari is not looking bad at all. The standard sensor stack has a long ways to go.

Standard f/5.6
Standard f/5.6
Kolari f/5.6
Kolari f/5.6

The Kolari is looking good here, good enough for darned near anything.

Standard f/8
Standard f/8
Kolari f/8
Kolari f/8

The standard stack make a big step at f/8, but still trails by a lot.

Standard f/11
Standard f/11
Kolari f/11
Kolari f/11

Kolari is still ahead, and still looking good.

Standard f/16
Standard f/16
Kolari f/16
Kolari f/16

The Kolari still looks better at f/16. Should we credit the lack of an AA filter?

Standard f/22
Standard f/22
Kolari f/22
Kolari f/22

The Kolari is a tiny bit better at f/22. That has to be the AA filter difference.

The Last Word

← Kolari Vision thin-stack mod on a7II — Leica 24/3.8 Elmar-M Kolari Vision thin-stack mod on a7II — Leica 50/1.4 Summilux →

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