6/14/10
Check out the comparison between the Sony Carl Zeiss 24-70mm (at 50mm) and the Sony 50mm F/1.4. This is the last comp with the CZ zoom and the primes.
The Sony 50mm F/1.4 is definitely superior to the CZ zoom at 50mm, but I don’t think that should keep you from unloading your primes and using the CZ 24-70mm exclusively as a landscape lens, at least in my opinion. The CZ zoom is pretty sharp and compares well with the prime when stopped down to F/8.