I have the oly 12mm F2, and wonder if there's a way to compare lenses with different FL and apertures for astro shots - esp milky way. The 7-14mm F2.8 can have a slower shutter speed than my 12mm F2, and so may have nicer milky ways shots. The PL 12mm F1.4 should be great for milky way, but I haven't seen any samples. I'm also concerned that the 12mm F1.4 is almost $2000 CDN while the grey market for the 7-14 is 1000 CDN (not incl duty and taxes). The 9.5mm F2.8 Kowa is also interesting. I'm not too interested in a FE, and I'd want to try before buying.