With it's high price tag I was expecting much from this lens on my GH3 but the edge resolution is disappointing under 25mm where my 14-45 is better at a fraction of the price. I shoot mainly at F8 and would expect any wide open edge losses to be resolved when stopped down but doing this on the 12-35 does very little. I was about to buy a 35-100 as well but was stopped when I started to read reports and see tests showing a similar so-so edge performance so this may simply be the design compromise of these lenses. On the plus side it has fast AF, weather sealed, fast aperture, a good solid feel and not bad edge resolution at 35mm. Think I'll sell it unless it's simply a bad copy.

The first question I have is do you have a good reason to shoot at F8.0?

I am getting tired of people stopping m4/3s lenses down and then complaining about the mistake they just made.

Why is it a mistake to stop down to f/8.0 for landscape photos? This ensures everything is in focus, and f/8 isn't a high enough f/stop to have any major loss of sharpness from diffraction.