Sigma 28-135mm f3.8-5.6 Aspherical IF Macro is one of several innovative lenses recently introduced by Sigma Incorporating aspherical optics, plus a floating inner focusing system, this lens minimizes spherical aberration and stigmatism.
This lens can focus from infinity to 19.7 inches at all of the focal lengths without close-up accessory, and as close as 9.4 inches (1:2 reproduction ratio) at the 135mm zoom position.
This lens incorporates an inner focusing system and features a non-rotating front lens barrel for convenient filter use.
A custom designed Perfect Hood with bayonet mount is provided to prevent extraneous light from degrading the image quality.
''A very useful focal-length range, compact size, and ability to take close-ups down to 1:2 with no further attachments certainly make this a very attractive all-purpose lens.'' Popular Photography, October 2000
