Pre-mount and be ready to go! Rain or Shine The Hydrophobia will give you peace of mind! Works with 300mm 600mm lenses Pre-mounts to lens hood for easy deployment Fully waterproof and seam sealed Raincover can go on while SLR is attached to lens Clear PU window to view LCD and controls Right and left hand entry points SLR can turn vertically in either direction Teleconverter can be changed using traditional method Memory card can be changed without taking cover off Batteries can be changed without taking cover off 600 mm extension provided for long lenses Mesh bag included for transportation and storage