The Sigma DROP-IN WR VARIABLE ND RND-21 is a dedicated drop-in filter designed for the SIGMA 300-600mm F4 DG OS | Sports lens. It allows photographers to adjust the neutral density effect via a built-in dial while the filter is mounted, enabling up to 7 stops of light reduction. This makes it ideal for achieving slower shutter speeds in bright conditions, such as during panning shots in motorsports photography.
The Sigma RND-21 Drop in WR Variable ND Lens Filter is specially designed for the Sigma 300-600mm f/4 DG OS L-mount lens. This weather-resistant filter slots directly into the rear of the lens, allowing photographers to adjust light intake without removing the lens from the camera. The variable neutral density design provides flexibility in exposure control across changing lighting conditions, ideal for wildlife and sports photography where the 300-600mm telephoto range excels. Manufactured to Sigma's renowned optical standards, this filter maintains image quality while extending creative possibilities in challenging lighting environments.
