Thanks, those are exactly what I've been looking at
what's the best way to test the 35mm for sharpness?, any simple quick method?
I am not an expert so this is just my way of doing it.
The first thing to know is what is sharp for others may not be sharp enough for you, so your own standard is what you need to meet.
Second, unless you know already how all your other lenses behave, it is probably best to compare a new lens with something you already have that is sharp by your standards, preferably in a similar FL and aperture.
A simple and quick way is to point it at a brick wall, preferably with writing/graffiti/objects/doors/windows in it. You can use a tripod with remote release etc if you want to be fussy, but for a quick test, simply hand hold at speed over 1/250 and use AF. Make sure there is something with texture in the center and at the corners.
For infinity testing, point it at a building or cluster of buildings and a horizon in the distance (usually anything over a 100ft away should do it). Make sure you tilt the camera 45 degrees so that there is something at the corners instead of blue sky.
Take test shots at all apertures at 1 stop interval (I usually shoot at the widest, f2.8, f4, f5.6, f8 and stop there).
Use the Compare tool in LR to view images side by side at full resolution.
I use a big 24X36 USAF resolution target -
http://www.edmundoptics.com/test-targets/resolution-test-targets/resolving-power-chart/83001/ - to do my tests, but this is a quick and simple method.