The Sigma telephoto lens for Pentax cameras has a maximum aperture of f/5.6 and a focal length of 400mm. It is manual focus only. The lens is designed for Pentax mount cameras and has a compatible filter size of 72mm. Its high-quality construction and exceptional performance make it a valuable addition to any photographer's kit. The lens is in very good condition. I am selling as I have switched to Fuji.
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