3.5X High-Definition Telephoto Converter for Sigma SD15 — For Lenses with 49, 52, 55, 58, 62 & 67mm Filter Threads

Turn your existing DSLR setup into a long-reach rig with this 3.5X High-Definition Telephoto Lens, compatible with Sigma SD15. Designed to mount over your current lens, this telephoto prime delivers increased magnification without degrading image quality. Optical construction includes three extra-low dispersion (ED) glass elements to control both longitudinal and lateral chromatic aberration in sharp and out-of-focus areas, significantly reducing purple fringing and ghosting across the aperture range and cutting down time spent on post-processing. The lens features a shortened flange distance to boost edge-to-edge sharpness and keep the unit compact and easier to carry than many alternatives. Multi-coated optical glass at the front accepts 72mm filters, maximizing light transmission and minimizing internal reflections; the filter-friendly design makes attaching accessories straightforward. Ideal for wildlife, sports, and portrait work, the converter is incredibly portable — it measures just 2 inches in height and weighs only 6.4 oz (without the hood). Package contents: Lens, Pouch, Stepping Rings, Lens cap, Bottom Cover.