Hello, I wanted to try Macro on my Panasonic Lumix G1 so I've tried extension tubes and diopter filters. The extension tubes allow nice macro shots but they are tricky to set subjects in focus and the diopter lens produce color aberration. So I've decided to try a dedicated Macro lens but could not afford to buy the Leica/Panasonic 45mm, so I looked into a second hand Tamron 90mm F/2.5 Macro (model 52B) with the 2X teleconverter. I've also purchased an Adaptall 2 to m4/3 adaptor (Tamron Adaptall AD2 Lens To Micro 4/3 M43 Mount Adapter | eBay) When I finally got the two I was disappointed with the results of the lens on my G1. The images never look pin sharp (and even know it is a manual focus lens it is a bit difficult to focus). I've tried the lens alone with no 2X Teleconverter and with the Teleconverter (to get 1:1) I've made a side-by-side test with my cheap Panasonic 45-200 G Vario lens and the pictures taken with the Panasonic lens look more sharp than the Tamron ones. Also, the pictures taken with the Tamron have a bit of a blue cast. I have also an old Tamron 70x210 Adaptall2 zoom lens that I've used with that same AD2 to m4/3 adaptor. I've got the same blue cast result and a not so sharpen pictures (but they are a bit sharpen than the 90mm f/2.5). The Tamron 90mm f/2.5 model 52B is a classic lens with good reputation but looks like it is not performing so well on my camera. Could that be because of the adaptor? I've read once in another forum about a problem with an adaptor that could not allow the lens to have the correct distance from the sensor. Do you think my problems could be related to the adaptor I'm using? I've taken a look at eBay and there are dozens of similar adaptors. Apart from a different logo/brand they all look equal to me, so I'm not sure to go and purchase another one and risk to have the same bad results... Any thoughts? Anyone using Tamron Adaptall lenses (or this particular lens) with AD2 to m4/3 converters? Wich one are you using?