Hi guys, I only have 2 lenses in my system - 18-200VR and a 50mm. The Raynox 250 doesn't fit on the 18-200, and even if I use a step down filter there is severe vignetting. So I'm left with the 50mm prime. Do I lose anything by not fitting the Raynox onto a zoom lens? I've read posts where people said it performs best on a telephoto lens. I have some spare change and want to buy something to improve my macro shots. These are my options - 1. Get a Tamron 90mm macro lens and ditch the Raynox 2. Upgrade my cheap aluminum tripod (pan and tilt) to one that is more suitable for macros. Ballhead or pan/tilt? 3. Get a zoom lens with the right screw thread that can fit the Raynox. Another question - do I need to get a focusing rail? Does it help when using the Raynox?