(From Sigma lens literature) The Sigma APO MACRO 150mm F2.8 EX DG OS HSM is a large aperture medium telephoto macro lens which incorporates Sigma's original Optical Stabilizer function. The ...

These kits may be designed for Apertura telescopes, but they are suitable ... aperture and apochromatic triplet objective lens, Askar's 120 APO delivers stunningly sharp and color-corrected ...