Most helpful critical review
3 of 4 people found the following review helpful
A good lens with lots of little problems
on 17 July 2014
Having read up a lot about which macro lens to get and having tried them all out I knew the Canon 100mm macro f2.8L was the right lens. Unfortunately it's out of my price rage so I went with the Sigma 105mm instead.
The lens is well build and feels very solid in hand, the focus is smooth and has just the right amount of resistance for me, the switches are a little stiff, but they are big enough for even the most tiny hands to get to grips with. I liked how the lens comes with two lens hoods (or one hood in two parts) and the lens cap is an inner pinching one, unlike the canon caps.
Where this lens really falls down is on image quality. When shooting at f2.8 there is a very noticeable halo to every image - I've tried shooting into the light, off camera flash, macro flash, side lit and so on; the halo is always there. The good news is that the lens profile in LR5 automatically corrects this problem. The halo is gone by f4.
The next problem is the autofocus. Sigma's reputation for build quality and testing has improved, but the need to adjust the AF for each lens is still there - each lens leaves the factory slightly different. My own lens is back-focusing, so when shooting at f2.8 and focusing on the eyes, the models ears are in focus. More than anything this is annoying and should be spotted before the lens leaves the factory - but I only need the AF for portraits as I manual focus for macro.
Over all, it's a good lens, but there are little annoying things that add up to take away from my enjoyment of it. As soon as my finances improve (and my shopping list of other lenses is shorter) I will be replacing it with the L-series Canon.