Hi. Short question: What lens would you choose for interior photography? Long question: I'm a noob GH1 owner and I've been learning photography with an old cheap pentax K mount legacy prime 50mm (100mm equivalent). I want to buy a my first native lens but the more I search the Web, the more confused I am... First I wanted the 14-140mm, then I was sold by the 20mm, and then by the 25mm with better AF, low light and sharpness. But now I want to start shooting interiors (hotel bedrooms, etc) and I don't have a clue what's the "best focal length" (Like I said, I only used 50mm) Here I am on the eternal fight with prime sharpness Vs the zoom practicality Here's my questions "cloud" on my head: Is the expensive Panasonic 7-14mm sharper, or is the Olympus 9-18mm more costly effective? And more important, do you guys think I will need these zoom focal lengths over the primes? Will a prime be sharper? And money a$ide, what's sharper? Cheap side 1. 20mm (or other) Vs 14-140mm II? I really love the 20mm but isn't too narrow for interiors? I was on the way to get the 14mm pancake but after viewing the DREWnetwork review my love fell apart. 1.1. 20mm Vs Panasonic 7-14mm? (just to learn how much sharper is a cheap prime over an expensive zoom) Expensive side 2. Olympus 12mm f/2.0 Vs Panasonic 7-14mm f/4? And Finally: 3. Panasonic 12-35mm f/2.8 Vs Panasonic 7-14mm f/4? What would you get if you only want the most sharpest images? (I would include the Olympus M. Zuiko ED 12-40mm f/2.8 but having a 40mm with no stabilization is a no go for me.) I'm sorry for these awkward questions but I would love to ear any kind of opinions on this subject if you understand my position (and my English) Thanks for your time.