This FR10 Fiber Receiver is designed to accept all wavelengths from 400 nm to 700 nm with very high efficiency using multimode fiber. Even if the light is not ideally collimated, the focus adjustment can compensate to optimize your input signal and be locked down. Front aperture can accept 1/2-in. (12.7 mm) filters for signal discrimination. The Fiber Receiver is terminated with an SMA receptacle or pigtailed. Larger sizes, fiber choices and different wavelength regions can be made on a custom basis.