(From Sigma lens literature) This telephoto zoom lens provides a large ƒ/4 aperture at all focal lengths. The new multi layer lens coating and lens design reduce flare and ghosting, and also maintains minimal light-fall-off. Superior peripheral brightness is ensured.
New multi layer coating of this lens gives superb color performance whilst cutting down flare and ghosting caused by reflections from the digital image sensor. High optical performance is demonstrated throughout the entire zoom range.
Two SLD glass elements are used ...Continua → Share