i am sorry i dont understand whats "pp" is that post processing? There is none...
however, I did find this to be as sharp as it can be when shooting landscapes at 1.8. I really think this is the best it can do at 1.8... This did not seem to be as sharp as the ones in the review, and thats why I was asking for your opinion. I know these are not a lot of photos, but I can post more.
Here is another:
http://img685.imageshack.us/img685/6154/igp4009b.jpg
Focus was done manually on the mail box. Iso is 200, F1.8.
I admit, once you stop the lens down to say F5 it gets A LOT sharper and most landscapes I will shoot (as you say, my kind of photography) are likely to be at an even greater F stop. My only concern, as expressed in my original post, is about the sharpness at F1.8 and about the difference between the left and the right corners...Here is brick wall test at ISO 200, F1.8:
http://img521.imageshack.us/img521/2414/igp3924.jpg
I am obviously pixel-peeping, but if you look at 100% and compare the top left corner with the top right you will see what I mean. I first suspected that either the camera wasnt perfectly aligned with the wall or one of the bricks was sticking out of the wall further than the other, so I repeated it with the focus chart and a lot more precision (results are posted in my original post). Seems like the corner differance percisted.
I am only asking bcs I dont know if its a big deal or not. The edges improve a lot as you stop down, however even by F5 you can see how the left edge cannot quite catch up to the right one..