This is a purely unscientific "test" of various 50mm lenses on the Sony a7. No tripod was used and the photos were taken several months apart. All shots were taken approximately midday, at ISO 100, WB @ 5300K, and lens focused to near-infinity. I figured I would try to document my "adventures" finding a good 50mm on the a7.

There are two photos for each lens. The photo on the left is "out-of-camera" RAW, converted from Lightroom to Photoshop and saved as a JPG. No further corrections were made. The photo on the right is essentially the same, with the only difference being basic adjustments in Lightroom, such as color balance, exposure, vignette control, and clarity set to +16. 

To view photos taken with these lenses, please visit: https://flic.kr/s/aHsk56hERc.

Canon 50mm f/1.2 FDn

Sony a7 + Canon 50mm f/1.2 FDn (RAW > Lightroom > Photoshop > JPG. No corrections)Sony a7 + Canon 50mm f/1.2 FDn (RAW > Lightroom > Photoshop > JPG. No corrections)   Sony a7 + Canon 50mm f/1.2 FDn (RAW > Lightroom > Photoshop > JPG. Color balance & exposure values edited in Lightroom. Clarity +17)Sony a7 + Canon 50mm f/1.2 FDn (RAW > Lightroom > Photoshop > JPG. Color balance & exposure values edited in Lightroom. Clarity +17)

Canon 50mm f/1.4 FDn

Sony a7 + Canon 50mm f/1.4 FDn (RAW > Lightroom > Photoshop > JPG)Sony a7 + Canon 50mm f/1.4 FDn (RAW > Lightroom > Photoshop > JPG)   Sony a7 + Canon 50mm f/1.4 FDn (RAW > Lightroom > Photoshop > JPG. Color balance, exposure, clarity, and vignette values edited in Lightroom)Sony a7 + Canon 50mm f/1.4 FDn (RAW > Lightroom > Photoshop > JPG. Color balance, exposure, clarity, and vignette values edited in Lightroom)

Canon 58mm f/1.2 FL/FD

Sony a7 + Canon 58mm f/1.2 FL/FD (RAW > Lightroom > Photoshop > JPG)Sony a7 + Canon 58mm f/1.2 FL/FD (RAW > Lightroom > Photoshop > JPG)   Sony a7 + Canon 58mm f/1.2 FL/FD (RAW > Lightroom > Photoshop > JPG. Color balance, exposure, clarity, and vignette values edited in Lightroom)

Canon 50mm f/1.4 LTM/M39

Sony a7 + Canon 50mm f/1.4 LTM/M39 (RAW > Lightroom > Photoshop > JPG)Sony a7 + Canon 50mm f/1.4 LTM/M39 (RAW > Lightroom > Photoshop > JPG)   Sony a7 + Canon 50mm f/1.4 M39/LTM (RAW > Lightroom > Photoshop > JPG. Color balance, exposure, clarity, and vignette values edited in Lightroom)Sony a7 + Canon 50mm f/1.4 M39/LTM (RAW > Lightroom > Photoshop > JPG. Color balance, exposure, clarity, and vignette values edited in Lightroom)

FE Sony/Zeiss 55 f/1.8

Sony a7 + FE Sony/Zeiss 55 f/1.8 (RAW > Lightroom > Photoshop > JPG)Sony a7 + FE Sony/Zeiss 55 f/1.8 (RAW > Lightroom > Photoshop > JPG)   Sony a7 + FE Sony/Zeiss f/1.8 (RAW > Lightroom > Photoshop > JPG. Color balance, exposure, clarity, and vignette values edited in Lightroom)Sony a7 + FE Sony/Zeiss f/1.8 (RAW > Lightroom > Photoshop > JPG. Color balance, exposure, clarity, and vignette values edited in Lightroom)

Konica Hexanon AR 57mm f/1.2

Sony a7 + Konica Hexanon 57mm f/1.2 (RAW > Lightroom > Photoshop > JPG)Sony a7 + Konica Hexanon 57mm f/1.2 (RAW > Lightroom > Photoshop > JPG)   Sony a7 + Konica Hexanon 57mm f/1.2 (RAW > Lightroom > Photoshop > JPG. Color balance, exposure, clarity, and vignette values edited in Lightroom)Sony a7 + Konica Hexanon 57mm f/1.2 (RAW > Lightroom > Photoshop > JPG. Color balance, exposure, clarity, and vignette values edited in Lightroom)

Leica 50mm f/1.4 Summilux E43 M

Sony a7 + Leica 50mm f/1.4 Summilux E43 (RAW > Lightroom > Photoshop > JPG)Sony a7 + Leica 50mm f/1.4 Summilux E43 (RAW > Lightroom > Photoshop > JPG)   Sony a7 + Leica 50mm f/1.4 Summilux E43 (RAW > Lightroom > Photoshop > JPG. Color balance, exposure, clarity, and vignette values edited in Lightroom)Sony a7 + Leica 50mm f/1.4 Summilux E43 (RAW > Lightroom > Photoshop > JPG. Color balance, exposure, clarity, and vignette values edited in Lightroom)

Zeiss Planar 50mm f/2 M

Sony a7 + Zeiss 50mm f/2 Planar M (RAW > Lightroom > Photoshop > JPG)Sony a7 + Zeiss 50mm f/2 Planar M (RAW > Lightroom > Photoshop > JPG)   Sony a7 + Zeiss 50mm f/2 Planar M (RAW > Lightroom > Photoshop > JPG. Color balance, exposure, clarity, and vignette values edited in Lightroom)Sony a7 + Zeiss 50mm f/2 Planar M (RAW > Lightroom > Photoshop > JPG. Color balance, exposure, clarity, and vignette values edited in Lightroom)

Super-Takumar 50mm f/1.4 M42

Sony a7 + Takumar 50mm f/1.4 M42 (RAW > Lightroom > Photoshop > JPG)Sony a7 + Takumar 50mm f/1.4 M42 (RAW > Lightroom > Photoshop > JPG) Sony a7 + Takumar 50mm f/1.4 M42 (RAW > Lightroom > Photoshop > JPG. Color balance, exposure, clarity, and vignette values edited in Lightroom)Sony a7 + Takumar 50mm f/1.4 M42 (RAW > Lightroom > Photoshop > JPG. Color balance, exposure, clarity, and vignette values edited in Lightroom)

Voigtlander 50mm f/1.5 ASPH LTM/M39

Sony a7 + Voigtlander 50mm f/1.5 ASPH LTM (RAW > Lightroom > Photoshop > JPG)Sony a7 + Voigtlander 50mm f/1.5 ASPH LTM (RAW > Lightroom > Photoshop > JPG)   Sony a7 + Voigtlander 50mm f/1.5 ASPH LTM (RAW > Lightroom > Photoshop > JPG. Color balance, exposure, clarity, and vignette values edited in Lightroom)Sony a7 + Voigtlander 50mm f/1.5 ASPH LTM (RAW > Lightroom > Photoshop > JPG. Color balance, exposure, clarity, and vignette values edited in Lightroom)

Voigtlander 50mm f/1.1 M

Sony a7 + Voigtlander 50mm f/1.1 M (RAW > Lightroom > Photoshop > JPG)Sony a7 + Voigtlander 50mm f/1.1 M (RAW > Lightroom > Photoshop > JPG)   Sony a7 + Voigtlander 50mm f/1.1 M (RAW > Lightroom > Photoshop > JPG. Color balance, exposure, clarity, and vignette values edited in Lightroom)Sony a7 + Voigtlander 50mm f/1.1 M (RAW > Lightroom > Photoshop > JPG. Color balance, exposure, clarity, and vignette values edited in Lightroom)