the last word

Photography meets digital computer technology. Photography wins -- most of the time.

  • site home
  • blog home
  • galleries
  • contact
  • underwater
  • the bleeding edge
You are here: Home / The Last Word / Kolari Vision thin-stack mod on a7II — Leica 50/1.4 Summilux

Kolari Vision thin-stack mod on a7II — Leica 50/1.4 Summilux

July 24, 2015 JimK Leave a Comment

This is part 5 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 Leica 50mm f/1.4 Summilux-M ASPH is problematic in the corners on all stock a7x cameras, although it has great on-axis sharpness. It doesn’t work too well on the Leica M240, either. How will it do on the Kolari Vision modified a7II?

Here’s the scene with both the modified and unmodified a7II at f/5.6:

Standard
Standard
Kolari modified
Kolari modified

Same color shift we saw in the earlier pictures.

In the lower left corner, at all whole apertures, enlarged 3:1, processed in Lightroom with daylight white balance and otherwise default settings:

 

Standard f/1.4
Standard f/1.4
Kolari f/1.4
Kolari f/1.4

Both are pretty awful.

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

Better, but still bad.

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

The Kolari is looking better than the stock camera.

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

Both are coming along nicely. The Kolari is better.

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

The standard stack is better. The Kolari is too, and is actually quite good here.

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

The Kolari is excellent. The Leica is very good.

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

Both are very good.

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

Diffraction has clearly set in. The Kolari image is somewhat sharper, probably because of the lack of an AA filter.

 

The Last Word

← Kolari Vision thin-stack mod on a7II — Zeiss 35/2 Biogon-M Kolari Vision thin-stack mod on a7II — Leica 18/3.8 Super Elmar-M →

Leave a Reply Cancel reply

Your email address will not be published. Required fields are marked *

February 2023
S M T W T F S
 1234
567891011
12131415161718
19202122232425
262728  
« Jan    

Articles

  • About
    • Patents and papers about color
    • Who am I?
  • Good 35-70 MF lens
  • How to…
    • Backing up photographic images
    • How to change email providers
  • Lens screening testing
    • Equipment and Software
    • Examples
      • Bad and OK 200-600 at 600
      • Excellent 180-400 zoom
      • Fair 14-30mm zoom
      • Good 100-200 mm MF zoom
      • Good 100-400 zoom
      • Good 100mm lens on P1 P45+
      • Good 120mm MF lens
      • Good 18mm FF lens
      • Good 24-105 mm FF lens
      • Good 24-70 FF zoom
      • Good 35 mm FF lens
      • Good 60 mm lens on IQ3-100
      • Good 63 mm MF lens
      • Good 65 mm FF lens
      • Good 85 mm FF lens
      • Good and bad 25mm FF lenses
      • Good zoom at 24 mm
      • Marginal 18mm lens
      • Marginal 35mm FF lens
      • Mildly problematic 55 mm FF lens
      • OK 16-35mm zoom
      • OK 60mm lens on P1 P45+
      • OK Sony 600mm f/4
      • Pretty good 16-35 FF zoom
      • Pretty good 90mm FF lens
      • Problematic 400 mm FF lens
      • Tilted 20 mm f/1.8 FF lens
      • Tilted 30 mm MF lens
      • Tilted 50 mm FF lens
      • Two 15mm FF lenses
    • Found a problem – now what?
    • Goals for this test
    • Minimum target distances
      • MFT
      • APS-C
      • Full frame
      • Small medium format
    • Printable Siemens Star targets
    • Target size on sensor
      • MFT
      • APS-C
      • Full frame
      • Small medium format
    • Test instructions — postproduction
    • Test instructions — reading the images
    • Test instructions – capture
    • Theory of the test
    • What’s wrong with conventional lens screening?
  • Previsualization heresy
  • Privacy Policy
  • Recommended photographic web sites
  • Using in-camera histograms for ETTR
    • Acknowledgments
    • Why ETTR?
    • Normal in-camera histograms
    • Image processing for in-camera histograms
    • Making the in-camera histogram closely represent the raw histogram
    • Shortcuts to UniWB
    • Preparing for monitor-based UniWB
    • A one-step UniWB procedure
    • The math behind the one-step method
    • Iteration using Newton’s Method

Category List

Recent Comments

  • Brian Olson on Fuji GFX 100S exposure strategy, M and A modes
  • JimK on Picking a macro lens
  • JimK on Picking a macro lens
  • Glenn Whorrall on Picking a macro lens
  • JimK on What pitch do you need to scan 6×6 TMax 100?
  • Hatzipavlis Peter on What pitch do you need to scan 6×6 TMax 100?
  • JeyB on Internal focusing 100ish macro lenses
  • JimK on How focus-bracketing systems work
  • Garry George on How focus-bracketing systems work
  • Rhonald on Format size and image quality

Archives

Copyright © 2023 · Daily Dish Pro On Genesis Framework · WordPress · Log in

Unless otherwise noted, all images copyright Jim Kasson.