I purchased a Sigma 105 Macro several years ago for my Canon. It's not the EF in terms of quality, but has proven an asset where I need a closeup in an industrial application. It appears to have travelled well in my vehicle despite the off-road construction sites I've had to visit. Fracture and concrete failure analysis in the field can be a bit rough on equipment.
NDP_ 2010 love those up close and personal of the insects! You may have given me a way to expand my horizons!