Im having difficulty deciding on buying a lens. Saw this ad on a Panasonic 20mm f1.7 for $250, emailed the seller that its a great deal but not in budget right now,suddenly he responded back and to my surprise he offered it for $200!!! he said he needs to sell right away to get a new system. currently i have an Oly kit lens 14-42mm iiR,40-150mm, a couple of minolta lenses (50mm 1.4,28mm 2.8) will this be a better low light option than my 50mm f1.4? they said that AF speed is slow so having a manual lens will almost be the same?