Thomas,
There is also a bit of post-production manipulation, not to mention the importance of picking just the right time of day to nail a shot.
I use Canon 5D Mark III (full frame) and 60D cameras with L-Lenses as follows, depending on what I'm trying to accomplish:
16-35mm
24-70mm
100mm (fixed)
50mm (fixed)
The factory recommendation is to shoot ISO in 320 (native) increments, but that was recently debunked by a series of camera tests. Obviously, the lower the ISO, the higher the resolution, but I cannot see much difference between 100 and 320 on the 60D. In other words, just because you set the camera to ISO 64 does not mean you'll get the equivalent of Kodak Kodachrome.
Depending on shutter speed, try to shoot between f5.6 and f11 - this seems to be the sweet spot on most modern digital cameras. Once you get to f16 and above, the top foot-candle readings tend to explode.
The 5D Mark III is freaky at low light levels - such as just before sunset. Meter readings below 10 foot-candles on the 5D defy the normal 100 ISO, 100 foot-candles, f2.8 equation calculations because at the bottom of the scale, the camera seems to magically pull extra light onto the sensor without much degradation. You'll be shocked at the elasticity of the resolution when you push it a bit in post.
I've obviously shot quite a bit using Zeiss cinema lenses and the effect at the bottom of the scale is actually magnified - although for still photography I recommend obtaining L-lenses (or their equivalent in Nikon or Leica or whatever) as there is no substitute for excellent glass. Personally, I obtain a little better results by turning the zooms all the way up or down, but I was trained by crabby old men who believed "hard" lenses are the way to go.
The regular i-Photo works very well for landscapes, but if you want to really polish up your shots, I use Aperture. I'm sure the PC users will have some recommendations of equally good (or better) programs. I am a recovering PC user and no longer touch Microsoft products to keep my tenuous grip on sanity intact.