English - Espaņol
Sharpness - Bokeh
with the One Dollar Resolution Chart (a7s edition)
Foto tutorial (English)
Foto tutorial (Espaņol)
Equipment recommendations US-ES
Flaat for Canon
Flaat for Nikon
Flaat for the BMC
Flaat for NEX-5N
Old Picture Style Tests
550D video lineskip
APS-C vs Full Frame
Badly assembled lenses and image quality
Lens mount compatibility chart
ISO on different cameras
High ISO on the 5D3
DIY: DR test chart
RGBWK Bayer sensors
Notes on DoF-FoV
Notes on crop-DoF-FoV
Custom Cropmarks for Magic Lantern on the Canon 550D
How many megapixels do I want?
How many megapixels can I see?
Quick Monitor Calibration Chart
I cut a one dollar bill in two, taped it onto a piece of cardboard (one half around the center, the other half on the top right corner), and took lots of pictures of it, with several lenses and with several settings (always using manual focus with live view maximum magnification).
Then I cropped a couple of interesting bits of those images, and pasted them in the nice tables you can see below. Here you'll see 100% crops from the 4240-pixels-wide still images, head over here for downsized-to-1920x1080 results.
The camera used was my new Sony a7s, with Flaat settings. I set the white balance the same for all shots, and set sharpness at the minimum.
The lenses I have tested are the following:
* Leitz Elmarit-R 24mm f/2.8 (1978) (Leica R)
* Leitz Elmarit-R 35mm f/2.8 (1978) (Leica R)
* Leitz Summicron-C 40mm f/2.0 (1973) (Leica M)
* Leitz Summilux-R 50mm f/1.4 (1976) (Leica R)
* Leitz Macro-Elmarit-R 60mm f/2.8 (1983) (Leica R)
* Leitz Elmarit-R 90mm f/2.8 (1966) (Leica R)
* Leitz Elmarit-R 135mm f/2.8 (1976) (Leica R)
* Leitz Elmarit-R 180mm f/2.8 (1967) (Leica R)
* Carl Zeiss Jena 300mm f/4 Sonnar Black (1974) (Pentacon Six)