35mm round up

Can you really have too many 35mm lenses?  Is the Sony Zeiss 35mm f/2.8 the best lens for the A7r? Or can you do better with vintage glass?  There’s only one way to find out.

Contenders:

Sony Zeiss FE 35mm f/2.8
Sony FE 28-70mm f/3.5-5.6
Leica-R Summicron 35mm f/2
Canon FD 35mm f/2 SSC Thorium
Canon nFD 20-35mm f/3.5 L
Canon nFD 35-105mm f/3.5
Sigma 30mm f/2.8 ART e-mount

This will be a multi part series as we find out the optimal benchmark conditions for these lenses.  In this first post we tried to focus on a test pattern on an LCD screen.  The goal was to look for subpixel patterns and areas of moire.  We felt the advantage of the screen was that it had even illumination allowing a method of measuring transmittance of the lenses.

This is a picture of the test setup:
35test-01634

 

All Crops are 1:1 crops from the A7r, shot in Raw, exported in LR with 25/1.0/25 of sharpening

Sony Zeiss 35mm f/2.8
@2.835test-01657FE35_2.8
@8.0
35test-01656FE35_8.0

Sony 28-70mm f/3.5-5.6
@4.0 (kit lens is wide open at 4.0 at 35mm)
35test-01642-KitLens4.0@8.0
35test-01645-Kitlens8.0

Leica-R Summicron 35mm f/2
@2.035test-01648Leica2.0@2.8
35test-01649Leica2.8
@8.0
35test-01650Leica8.0

Canon FD 35mm f/2 SSC Thorium
@2.0
35test-01638-Thorium2.0
@2.8
35test-01639-Thorium2.8
@8.0
35test-01640-Thorium8.0

Canon nFD 20-35mm f/3.5
@3.5
35test-01651FD2035L3.5
@8.0
35test-01652FD2035L8.0

Sigma 30mm f/2.8 ART
@2.8
35test-01653Sigma2.8
@8.0
35test-01654Sigma8.0

 

So in conclusion…this test pattern doesn’t give us too much information other than the amount of CA wide open with the fast primes and increase in moire with stopping down. We chose to stop down to a max of f8.0 to avoid diffraction limits.

The next test will hopefully better differentiate these lenses.

 

 

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