Hello all - I recently bought a GH2 and have several old Nikkor primes, namely: - a 200mm 4.0 - a 105mm 2.5 - a 55mm 3.5 - a 35mm 2.5 - a 28mm 3.5 - a 20mm 4.0 Being what you might call a rookie, I've posted a couple questions on this forum already and I still need your advice. My first question is can you effectively use a 200mm on a m4/3 camera? Wouldn't that become a super-tele lens on the GH2? Next is, why do you need such big aperture as is recommended by most 'experts' on the web? Is it just for the purpose of low light shooting? Because the primes I have got aren't super fast as you can see. I'd also like to know what lenses are typically needed for movie work? And now my big question: I'd like a wider lens and I'm not sure which to choose. Options I dug up so far are: -the very expensive new Olympus Zuiko 12mm 2.0 -the Sigma 14mm 2.8 -the Samyang/Rokinon 14mm 2.8 -the Panasonic 7-14mm zoom 4.0 -the way cheaper Panny 14mm 2.5 What would you choose? And also one last thing, seeing that I have a Nikon 20mm 4.0, would there be any advantage in getting the Panasonic 20mm 1.7? Thank you for reading.