Nikon Model Sunshade Spotting Scopes, 40mm, Silver The Nikon 40mm sunshade allows you to screw your very own sun visor into the threaded end of your Nikon scope. Finished in a brilliant Nikon Silver that is color matched to your Nikon scope it is sure to look great Nikon scope line can be relied on to help you line up that important shot when there are no second chances