[quote name='wim' timestamp='1317145089' post='1]
P.S.: You can do an interesting exercise on the MTF figures provided here on Photozone. Calculate lens lp/mm for the values provided at different apertures (lw/ih), and see what you get. Rather interesting exercise, which may make you worry less about sensor diffraction as well.
[/quote]
As mentioned the LW/PH figures can't be taken as a base for scientific calculations. This is clearly mentioned in the FAQ (for years actually).
Technically these numbers are all as "wrongly" scaled as the lp/mm or whatever elsewhere. It just doesn't work this way.
The key point is that they are valid from a qualitative standpoint.
Consequently we will move away from the LW/PH figures soon.
P.S.: You can do an interesting exercise on the MTF figures provided here on Photozone. Calculate lens lp/mm for the values provided at different apertures (lw/ih), and see what you get. Rather interesting exercise, which may make you worry less about sensor diffraction as well.
[/quote]
As mentioned the LW/PH figures can't be taken as a base for scientific calculations. This is clearly mentioned in the FAQ (for years actually).
Technically these numbers are all as "wrongly" scaled as the lp/mm or whatever elsewhere. It just doesn't work this way.
The key point is that they are valid from a qualitative standpoint.
Consequently we will move away from the LW/PH figures soon.