Been reviewing the lens MTF ratings on PZ and noticed that there appears to be a new MTF rating - e.g.
Older lens reviews cite an "MTF 50" rating with a max around 2250
Whereas the newer reviews cite an "MTF" rating - with a max closer to 4000
Are these two rating the same?
If not - Can someone explain the differences between the two ratings
And how they would relate? e.g. the new rating is 2x the old rating
Or are newer lenses just that much better?
Many Thanks
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The lenses get tested on a camera, and the given figures are about how many line pairs per image height the lens/camera combination are able to resolve.
When you compare a 10mp Nikon D200 (APS-C) with a Canon EOS 5D mk II (FF) the results in numbers will be vastly different!
You should NOT try to compare APS-C lens tests with full frame lens tests. Also, do not look at the numbers when comparing same format tests done on different camera bodies. Only look at the bar heights in the graphs, those will give a good general impression (not a super precise one) on how lenses compare.
[quote name='Brightcolours' timestamp='1334329803' post='17494']
The lenses get tested on a camera, and the given figures are about how many line pairs per image height the lens/camera combination are able to resolve.
When you compare a 10mp Nikon D200 (APS-C) with a Canon EOS 5D mk II (FF) the results in numbers will be vastly different!
You should NOT try to compare APS-C lens tests with full frame lens tests. Also, do not look at the numbers when comparing same format tests done on different camera bodies. Only look at the bar heights in the graphs, those will give a good general impression (not a super precise one) on how lenses compare.
[/quote]
Apologies - my examples were not good - but I get it - you really need the little coloured legend!
Many Thanks
