The 49mm size on the end of the adapter is one of the most common filter sizes. The selection of filter/lenses is not only very large but competitively priced compared to Canon's 58mm. The Canon Macro (close-up) lens has a street price of about $115 and is less powerful (and less versatile) than the macro sets that we sell.
Click here to see a comparison of close-up shots between a regular G1, a G1 with Canon's Macro lens and a G1 with our Lensmate Adapter and Macro Filter set.
But more about the adapter: it is large enough not to vignette at any focal length. We've heard of another adapter that reduces the lens opening to 37mm- we would suggest that the smaller "glass" would have to increase the potential for distortion and vignetting. If you have a collection of filters/lenses already and require a size other than 49mm, we offer "step-up" rings (and "step-down" rings are readily available) to match just about any size lens/filter to the Lensmate adapter.
The adapter itself is $21.95 and does not include filters. We also sell Macro-filter sets, UV filters and Polarizers for the adapter.
Click here to go to our G-Series order page.