Sharpest Aperture
After reading Ken Rockwell's Sharpness vs. F/Stop[a] page, I decided to perform the same tests on my Casio Z850.
All the pictures were taken at aperture priority mode, ISO 50, sharpness, contrast and saturation set to zero (default). I used a tripod and 2s self-timer to keep hand shake from distorting the pictures.
Wide
First, the lens at its widest setting 7.9mm (38mm equivalent):
Zoom
Second, at 23.7mm (114mm equivalent):
Zooming in 3x on the above without interpolation:
Summary
The smaller aperture is the sharper one. The downside is that the exposure time doubles. The tradeoff - less sharpness for a faster shutter time - makes sense if you're shooting handheld (which p/s cameras are built for), but not when you are using a tripod (which nobody really expects you to do with a p/s).
Links
http://www.kenrockwell.com/nikon/50-comparison/f-stops.htm |