I use four achromatic close-up lenses: Raynox 250, 150 and 202, and Canon 500D, to photograph mainly insects, spiders etc and small flowers. Used on a 45-200 lens on a G3 these capture scenes down to about 4mm wide. A few days ago I purchased a Panasonic 45-175 lens. It makes the close-up lenses much easier to use, especially the more powerful ones, and my early impression is that it is producing better and/or more pleasing image quality too. (I need to examine and post process more images to work out exactly what is going on – the story is not straightforward, but seems very promising thus far.) Given that it is also significantly lighter than the 45-200 (which matters to me because of the techniques I use), does not suffer from lens-creep (which matters to me because I sometimes shoot from above) and focuses very positively and quite fast, I am so far well pleased with the 45-175.