I’m also looking to purchase a macro lens. The three lenses I’m looking at are all around the same price, but offer different things.
The first is an Olympus 50mm f/2.0 Telephoto Macro ED Lens, it’s been reviewed as highly recommended by dpreview.
The second lens is a Sigma 18-50mm f/2.8 EX DC SLD ELD Aspherical Macro Lens, the flexibility of a zoom would be nice
The third and final option is a Sigma 105mm f/2.8 EX DG Medium Telephoto Macro Len, the focal length is the selling point on this lens
The main subject for the macro would be flowers, but I’m sure insects would also be in the mix. I’m leaning towards the Olympus 50mm right now, but any feedback on the three lenses listed would be helpful.