Here's another shot from this lens:
Frozen by Thousand Word Images by Dustin Abbott, on Flickr
Fantastic! How do you manage at the low temperatures you experience? I went to an ice sculptures festival at -8C and had really painful fingers afterwards ( I was wearing black painters gloves that are sufficiently warm for most of my 0+ C outings).
Now that I'm digging into macro lenses, I find I'm torn between the new Tammy, the 100mm Canon 'L', and the 150 mm Sigma. They all seem to have some benefits to them. For the Tamron it's price and quality, the Canon has a slightly more pleasing bokeh (if I'm correct) and it would help me reduce my variety in filter sizes, the Sigma has the benefit of a longer working distance and it is a super-apochromatic lens but it has no weather sealing.
Knowing that you own the Canon, would you say it gives more pleasing images than the Tamron? I'm looking for the best and most useful macro here, please do not consider the cost of these lenses as I can afford to buy any one of them (but not all of them ).
I really love my 100L, and I do think the focusing is a bit better on it. The Tamron is just as sharp (if not slightly moreso), but the 100L is pretty special. If you can get a good price on it, it is still my favorite choice. If there isn't a deal, I think the Tamron is the better buy.
I sometimes wear two sets of gloves into the field. One very tight, close fitting pair (basically neoprene) that I use for shooting, and then a second pair that is a little heavier for the "in-between" times.