Originally posted by matthis Suspecting you are confusing borders with corners, I see nothing in the Photozone test supporting your claim.
BTW, the Photozone figures give merely a hint to the quality of a lens. The relevance of MTF50 measurings is rather limited.
If you don't see the point... well there will be others who will.
I think you are lacking experience.
Comparing a 28mm equivalent to a 16mm lens is really useful.
BTW, I have not seen any 24 MP pictures with a 4/3 camera.
Quote: "At 14 and 18 mm the borders and extreme corners follow only slightly behind with very good resolution, at 14 mm just crossing the mark to excellent figures at some aperture values. At 24 mm, the border and extreme corner resolution falls a bit behind, but can recover to very good figures stopped down to f/5.6 or f/8. "
I think its written quite clearly in English. Good in the corners (even if exceptional in the center) and Photozone, whatever are the flaws of their test is maybe the most respected ressources of the Internet when it comes to
There are some classes of lenses that have been stopped to be produced because of specific flaws that impaired their use. Typically mirror telelenses have been stopped mostly beacause of the "donut bokeh".
The point of a wideangle is about sharpness accross the range. Using a wideangle for portraiture for example will introduce perspective distortions with unpleasing consequences. Basically an ultrawide / ultrafast zoom is made for reporters and weddeing photographers needing to make interior shots. Now, in group picture, I'm not sure that Aunt Sally will be pleased if she sees herself all blurry because she's on the side of the frame. If you feel that I'm missing the point, please provide any example of picture where center sharpness is critical, border accessory and that can't be done by a longer lens.
Now, regarding experience, I think you shall be refraining your comments, I do have some experience, I hang out quite with some pro photographers who have been educating me regarding photography. And, living in Paris, I can attend to expostion of major artists on a regular basis (seeing photographies from Evans, Depardon or lately Mimo Jodice do a lot to cool your head down) I certainly do not consider me a "mature" photographer, but owning and using my share of FA and DA ldt, a full 6x7 system (including the 45mmF4) and some few other things, so all in all I consider myself quite educated regarding the artistic and techncial sides.
That is saying that I don't have anything against this lens. Maybe further field and lab will show a good performer. And I do know that an ultrawide lens is a hudge technical challenge. That been said, in that class, Nikon did set the benchmark and Tokina will be fatally compaired to it, producing an ultrawide, ultrafast, FF lens is a disclamer for pro quality and therefore whall be compared to the Nikon.
Anyway, ultrawide is not my taste and I feel that 28mm (FF) is plenty enough for when wideangle is needed. I can go for a long time on why 24mm and wider lenses are producing at the moment a "in your face" photography that I don't like with photo-reporters and provide examples and arguments, but that's not the subject of this thread. Which is about the expected qualities of a specific lens.