What are your thoughts re Sony SEL 16mm and additional VCL-ECU1 0.75x E-Mount Wide Angle Conversion Lens? Worth it? It would be mounted onto the Nex 6. I've been told that I should invest in a good wide angle prime lens. While I have my eye on the Zeiss 24mm, dishing out the $$ isn't an option today. Looking for something that will be good, knowing full well it won't be GREAT! Thoughts?? Ideas? Input??