One of these two images was shot with an 18-70 DX at 50mm F/5.6. The other image was shot with a 50mm F/1.2 AI-S. Before you dump your 18-70DX to chase a better lens, see if you can tell the difference. Heh Heh.
OK, Neil, I give up. I'm thinking the second shot is the 18-70, because of your text and because it looks...sharper. I still have and love my 18-70. Maybe I got a really good copy, but it never disappoints.
BTW, I'm the guy who does lots of macro who you suggested I might consider the Markins M20. Ordered it today!
Eric