09-22-2011, 09:04 AM
[quote name='Klaus' timestamp='1316678978' post='11762']
You could argue that these MTFs show the performance fully open.
However, e.g. the 10-30mm f/3.5-5.6 is actually a "27-81mm f/9.5-15" so given the dependency of diffraction they should perform best at max. aperture. Even the "fast" 10mm f/2.8 is just a "27mm f/7.5". Hmmmh ....
[/quote]
The equivalent aperture only represents for similar depth of field, not the image quality, or the compact cameras with much smaller sensor size will cry...
You could argue that these MTFs show the performance fully open.
However, e.g. the 10-30mm f/3.5-5.6 is actually a "27-81mm f/9.5-15" so given the dependency of diffraction they should perform best at max. aperture. Even the "fast" 10mm f/2.8 is just a "27mm f/7.5". Hmmmh ....
[/quote]
The equivalent aperture only represents for similar depth of field, not the image quality, or the compact cameras with much smaller sensor size will cry...