Category Archives: Contax G-Mount

REVIEW: Carl ZEISS 28mm f/2.8 Biogon T* + 1.5m pcx filter

The Contax G 28mm Biogon was considered one of the best 28mm available on film, but suffers serious issues on digital due to sensor cover glass. Can a simple filter make the lens a competitive performer on Sony cameras? Find out below.

I have shot this lens for years on the Sony A7 and more recently with a PCX filter and then on a Kolari UT modded A7. Unless otherwise noted, all of the tests in this review were performed on a Sony A7RII with a reversed 1.5m PCX filter on the lens (Thanks again to Nehemiah for lending me the A7RII). Check captions on sample pictures to see what camera was used. Bonus: The Contax G 28mm Biogon is both Phillip and my favorite lens on aps-c cameras, so I will also add a second installment later reviewing the lens for aps-c provocatively titled How the A6000 + Contax G 28/2.8 is better than an RX1.

Sample Images

Sony A7 | Carl Zeiss Contax G 28mm f/2.8 Biogon | f/2.8
Sony A7 | Carl Zeiss Contax G 28mm f/2.8 Biogon | f/8
Sony A7 | Carl Zeiss Contax G 28mm f/2.8 Biogon | f/11
Sony A7 | Carl Zeiss Contax G 28mm f/2.8 Biogon | f/11

Continue reading REVIEW: Carl ZEISS 28mm f/2.8 Biogon T* + 1.5m pcx filter

Review: Zeiss Sonnar 2.8/90 T* on Sony a7II

Zeiss Sonnar 2.8/90

The specs of the Carl Zeiss Sonnar 2.8/90 sound great: Small, cheap, it’s from Zeiss so it should be very sharp and with the right adapter it even offers AF on the a7II! So how will it actually perform? Read on if you want to know.

Thanks to Uwe for loaning me the lens and Techart adapter for this review!

Sample Images

Zeiss Sonnar 2.8/90 Sample Image
Sony a7II | Zeiss 2.8/90 | f/2.8| full resolution
Zeiss Sonnar 2.8/90 Sample Image
Sony a7 | Zeiss 2.8/90 | f/5.6
Zeiss Sonnar 2.8/90 Sample Image
Sony a7II | Zeiss 2.8/90 | f/2.8

Continue reading Review: Zeiss Sonnar 2.8/90 T* on Sony a7II