So I ran out this morning on a day after the rain and the clouds where still very present so no direct sunshine for my test but I did it anyway. I always first test a new lens at this scene as it gives me a very good clue on how the corners are , how the vignetting is and whats the correction plus I get a good center sharpness test. Beyond all that its not a ugly brick wall, I have shot it hundreds of times and for me it serves as a good reference on what I shot before. Now i tested this wall with MF DSLR style, Tech cams, Nikons, Sonys and the hundreds of lenses i have bought. I know this wall maybe better than I know my own wife. LOL
Anyway I usually wait for sunshine but what the heck.
Lets start with Vignetting at F2 In Capture One I need to match a perfect 5.6 shot which we all know would be clean in the corners although F4 would have done it but playing it safe with 5.6.
So a F2 shot needs 1.50 plus EV vignetting control to match a 5.6 image. I think that is very typical myself and frankly I like a little vignetting on wide open shots but thats me.
Now at 2.8 it changes big time and I only need .50 plus EV to match a 5.6 corner.
So I will process at these settings for the corner tests but be aware i made those changes to the F2 and F2.8 images to match across the board.
Okay Ignore the Mercedes , I know pretty hard to ignore a Mercedes AMG but that is not supposed to be in the shots. I am focused squarely in the center on tripod , 2 second delay and a hoodman loupe to double check my focusing which is on the tail of that horse and letter B.