The Sinaron Digital 55mm F4.5 CPL Lens has the Copal between-the-lens shutters that enable this lens to be operated manually. Hence you don’t need any electrical power or computer or software to use this lens. Sinaron CPL digital lenses let you shoot images with high sharpness and maximum contrast levels.  

• This digital camera lens can be used with Sinar p3, Sinar f3, Sinar p3 SL, and Sinar f3 SL cameras
• The Sinaron Digital 55mm F4.5 CPL Lens lets you take premium quality images that have a high resolution
• The shutter speeds of the lens are 1/500–1 seconds, B, and T
• You can use this digital lens with the Sinarback eMotion, which has an on-board battery power supply
• Sinaron CPL Digital Lenses have a central leaf shutter type of size 0 and 1
• The resolving power of the lens is 50 line-pairs per mm through the complete image circle
• The CPL digital lens can be mounted on 100 mm lens board that comes with focal lengths from 28 mm to 210 mm