Panny 30mm macro practical on GM1?

OrdinarilyInordinate wrote:

How about trying this? Easy snap-on function to put on the existing lens. I'm not sure if it will be 100% compatible in terms of secure placement, but worth trying! Amazon's pretty good with returns.

http://www.amazon.com/Raynox-DCR-250-Super-Macro-Snap-On/dp/B000A1SZ2Y

http://www.amazon.com/Raynox-DCR-150-Snap-On-Macro-Lens/dp/B0007KS7D0/

I know a lot of people do swear by these lenses.  However, they look to be be designed for larger lenses - so shouldn't cause vignetting - but it looks like it would need an additional adapter ring to step it down to the 37mm diameter of the 12-32.

I actually already have a Canon 250D screw on close up lens, which I never use.  It might be worth getting a 37-52mm step up ring and try it on the 12-32.

I've used them with a simple 46 to 43mm step down ring on a Sigma 60mm (46mm filter size), works perfectly, since the step down ring is so slight we leave it permanently attached to the Sigma lens and switched it over to a 43mm cap. In your case you'd need a 37 to 43mm step up ring, shouldn't cause any vignetting.

The actual Raynox achromat lens is threaded for 43mm, the clip on adapter it comes with (they're two different parts) is what's made for larger lenses and only goes down to 52mm or whatever, but you don't have to use it if you don't mind the minor inconvenience of screwing on the achromat rather than clipping it on.

I think there's some debate about what works better on longer lenses or shorter lenses achromat vs the tubes. In practical terms the achromat is somewhat easier to attach while on the go and slightly smaller to pack (being essentially the same as any filter), the extension tubes are cheaper.