The lenscoat travelhood small in forest green is a lightweight alternative or replacement to the rigid lens hood that comes with your lens designed for use with 300mm f28 200 400mm f4 400mm do f4 and 500mm f4 lenses the ribbed design allows it to fold nearly flat to easily store in your gear bag or suitcase making this hood your perfect long lens companion made from lightweight water resistant material the lenscoat travelhood deflects stray light to prevent glare and lens flare the lensc