I have just joined this forum too, so no images posted yet. I have used 2 macro lenses - sigma 105 2.8EX and tamrom 180 2.8. The sigma was excellent, good build quality, pleasing bokeh, but had the drawback of very short working distances especially for 1:1. I found it hard to get close to insects, and sometimes would obstruct the light whilst trying to work the camera. The tamron doesnt feel as solid, true, but it it is still well constructed. The greater working length is its biggest advantage (about 30cm for 1:1), and it is quite light for its size. I have tended to use both lenses on MF for macro work, but I do find the tamron AF quicker when I use it. Both do well as portrait lenses.
Althouhg I would find it hard to choose one or the other for image quality,I use the tamron more than the sigma now, which I think speaks for its ease of use.
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