... This particular lens (Sigma EX macro lens - 50 mm F/2.8) allows you to focus on objects as close in as 20cm.
Sigma make many other claims about this lens, such as it having (SLD) special low dispertion and (ELD) extra low dispertion glass elements which help to provide excellent correction ... Read review
"...not the case with this Sigma lens.
This lens focuses very smoothly, a bit slowly (this is normal with macro lenses) but most importantly with macro it focuses quietly, I say quiet is most important because a lot of people that shoot macro shoot insects and butterflies and a noisy focus ring can soon frighten the subject off and then you end up with a photo of the branch or leaf that they were once sat upon instead of the creature itself, so for ..."
Ciao members have rated this review on average: very helpful
Product Information for "Sigma EX 18-50mm F2.8 DC" »
Manufacturer's product description
F2.8 large aperture standard zoom lens designed specifically for Four Thirds system. This zoom lens is exclusively designed to ensure compact and lightweight construction as well as provides the utmost correction against lateral chromatic aberration, which is a critical problem for digital SLR cameras.