[Alex Paul]

I'll voice my opinion as well... You can't go wrong with any of the good Macro lenses, Tamron, Sigma, Canon, and Tokina all have outstanding lenses... The question is how close can you, or do you want to be, what is the acceptible amount you are willing to spend, and what is the primary use?? (moving or stationary targets).This will determine the focal length you should get. I have seen outstanding results from all of the lenses made by these 4 companies. I shoot the Canon, 100 and 180 as well as a combination of reversed lens combinations and find I have absolutely no complaints about the IQ of my Canon lenses. The longer focal lengths afford better working distance than the shorter lengths and for nervous bugs it is an advantage. The longer lenses are also heavier but I find the weight helps me hold steady when hand holding the shots. Personal preference on the weight issue.. They are all capable of 1:1 macro . My recommendation would be to go for the 100 range as tubes will increase the size of the subject in the frame and also function nicely for other than Macro applications. I find mine useful enough even with others in the goodie bag that I know I won't part with mine.. Good luck and happy shooting.....Take care....Alex