Due to the 'horizon' not being entirely horizontal, i had to rotate it half a degree, which turned out to be killing for the sharpness in this one. I reckon PS would've done a fine job, but that just won't run on this extremely advanced Pentium 0.006. Instead, I used Irfanview and sharpened it afterwards. That in its turn gave more noise, which my camera already tends to create all by itself.