Using original three-group zoom technology, Quantaray has created the most compact zoom lens in its class. Less than 4 inches long and under 2.8 inches diameter, with a filter diameter of just 55mm. It covers the most frequently used telephoto focal lengths, making it perfect for a broad range of subjects and applications, from portraiture to sports and nature shooting. With Super Low Dispersion glass to keep color aberration to a minimum, this lens stands out both in optical performance and ease of use. It is the perfect companion lens for your Minolta AF SLR camera.PRODUCT FEATURES:Aperture type: Automatic/Variable.