http://www.microglobe.co.uk/catalog/product_info.php?pName=tokina-1935mm-f3545-lens-for-canon Tokina 19-35mm f/3.5-4.5 is a new addition to the Tokina lens range. It’s an auto focus lens with a minimum focusing distance of 0.4 meters. The lens construction sees the use of low dispersion (HDL) glass and multicoated elements, which are made by Hoya - the world's largest manufacturer of optical glass. While still retaining the same mechanical design as older Tokina lenses, this new 19-35mm uses durable polycarbonate barrel to reduce the overall weight. At 390g, it is a fairly light and easy to use piece of equipment. Generally, the lens handles extremely well and with only one stop loss between minimum and maximum focal lengths, it fairs well against other similar priced lenses. In terms of image quality it produces clear, sharp quality images but quality falls off at the edges, which was evident when photographing close ups.