Digital Nc 0.45x Wide Angle Lens (HD) Chrome Finish W/Macro (Modification Style) Magnetic Type For Foscam F19821W / FI9831W This magnetic stick-on HD (High Definition) wide angle conversion lens has been tested to be the ideal attachment for your Foscam F19821W & F19831W IP camera. Provides a 0.45x HD (High Definition) wider field of view. For indoor or outdoor use. Enables you to take in group shots, landscapes and scenic vistas otherwise impossible with the camera's standard focal range. This unique lens attachment is simple to use by removing the sticker from the included magnetic ring and attaching the adhesive side of the ring to the front rim of your camera lens. This wide angle lens easily and securely sticks to the now magnetized camera lens rim and is easily removed when not needed. The adhesive magnet ring may be left on the camera permanently and does not interfere with lens functions.