I must say, I am finding these new lightweight MkIII (both 600/f4 and 400/f2.8) MTF charts a bit puzzling ........ :brains:
It looks like more than just a small hit compared to the MkII's ...... so perplexed was I that I checked the 400 too, and it's showing a similar drop off in theoretical IQ like the 600.
I mean these new MkIII charts look more like they belong to a Tamron than an uber dollar Canon supertelephoto ...... they are definitely not a Tamron price though! :eek!:
Even more puzzling is when you look at the new lightweight Sony 400 f2.8 G-Master (which is essentially the same lens design concept as the new MkIII's) and it has a stellar MTF chart - more like the highly regarded MkII Canon's ......
Curiouser and curiouser :cat: :cat:
Canon say they are using a new standard to measure the lenses. And old lenses will be re-measured...:eek!:
I hope Canon realize that they have a communication problem here...
MTF:s without telling what units (lp/mm) etc. used are pretty useless.
Would be strange if they are that much worse than mkII:s as the Sony 400mm seems as sharp as you could expect.
Curiouser it gets.