Summary: The pictures are incredible, macro can't be beat, I couldn't ask for more beautiful up close shots. Works well as a general purpose lens for landscape or set portraits. Autofocus is almost totally useless on any moving subject or when really close in. Treat this as a manual focus lens, and yes I know my camera, I have no problems with my other lenses, just this one is very bad with autofocus.
Summary: The 90mm macro lens is a staple of 35mm photography; this lens is certainly a worthy successor in the m43 format. I can't fault its optical performance at all - sharp, good contrast, good color. Some reviews have noted slow autofocus, but I haven't found that to be an issue, at least with the latest software installed for both camera and lens.
Summary: It is heavier and better built than other non-Leica Panasonic lens. The focusing range is 0.5 ft to infinity. The macro photos taken with this lens are very good. Considering the cost of the lens, it might not be wise to buy it if one only takes occasional macro shots.
Summary: I needed a macro lense and also a faster short telephoto. I already have the 45-200 but it's max aperture is f4. This is 2.8 and much more useable. It works well on my G3 and my OMD m5. I like it who can't like Lica glass.
Summary: I've used the Canon 65mp-e macro as well as the Canon 100mm L macro. I like this lens better than both of those! It's sharp and combined with the GH3, focuses fast and is very sharp. I'm sorry I waited so long to pull the plug on this.
Summary: I recently converted my setup from a Canon DSLR to the Lumix 4/3 Micro system. This 45m Macro (90mm Equiv) is even better then my Canon 100mm Macro which was a fantastic lens. Buying it used from KEH (In like new condition) made it even better as I saved $300 over brand new. KEH is a great reseller of used camera gear in great condition at great prices!
Summary: I can hardly believe this lens is real. The artifacts that plague photography - purple fringing, cyan/magenta edges on white objects, green/magenta outlining on out-of-focus objects - are all absent when using this with my GH3. At any aperture. I don't care if this is being done through optical design, software correction, or a combination of the two, these are the cleanest images I've ever seen with digital gear.
Summary: I will not repeat all the technical information already included in previous reviews, for me - average amateur - it is more important the IQ and process to get it. About 1000 images had been taken with this lens. After using the legendary 20mm it is hard to be pleased, but 20mm is just not enough for many situations.