I'm considering purchasing a UWA lens for use with my E-M5. My decision seems to boil down to the Panny 7-14 vs the Oly 9-18. I'm leaning towards the Panny 7-14 for it's extra 2mm at the wide end and it's constant f/4, but am seeking opinions on whether it's worth the extra $$$ over the Oly 9-18. Also, I see that the Panny 7-14 is a bit difficult to find in stock right now. Amazon does have it at the moment, but for $1099 ($200 more than most places like B&H - but that don't have it in stock right now. (Note: I also see that Amazon is selling the Panasonic 20/1.7 for over $100 more than other places. Their prices are usually pretty competitive, so I wonder what's going on with them right now? Are they gouging their customers on hard-to-find lenses? ) Finally, I've read a few customer reviews on the Panny 7-14 that state excessive CA as a negative (but easily correctable using Lightroom). Is that truly the case? If so, how do you make that correction using Lightroom? Any thoughts on these items would be appreciated!