Find a 9-25 f/1.8-2.8 a 9- 18 f/4-5.6 costs $700.
This. I shoot m4/3, and would love to get something wider than the 12mm (24mm eFL) that I currently have, but I'm running into problems here:
- Cheapest option is the Oly 9-18mm, but it's slow (f/4-5.6), plastic, and still $400+ on the used market
- Next option is the Panny 7-14 f/4, which doesn't really work on Oly bodies (purple flare issue), which means picking up a used Panny body like a GX7 to go with it, which ends up running close to $1k total
- The m4/3 wideangle piece de resistance Oly 7-14 f/2.8, which is massively large, heavy, and expensive.
Or I could consider a DL 18-50, which has a 9-25mm f/2.5-4 lens in m4/3 terms. It's as wide as the Oly 9-18mm, brighter than all but the Oly 7-14, and smaller/cheaper than all but a used Oly 9-18. As a bonus, the 24-50mm range is quite useful as a social camera, which provides more flexibility than my E-PM2 with a small 14 or 17mm lens attached.
Add to that a sensor that's a bit less than a stop behind m4/3 in terms of DR and ISO noise, and you have a definite contender.
I'd consider it next time I have some money burning a hole in my pocket, and will definitely be paying attention if these get discounted before a gen II comes out.