Features: 1) Lens: water clear and blue are available 2) Diameter: Φ5mm 3) Radiant intensity (mW/sr) at IF=50mA: min. 20 4) Viewing angle: ±15° and ±30° available 5) Peak emission wavelength (nm): 850 and 940 6) Application: optical switches, optical encoders, optical instruments, automatic control apparatus, smoke sensors and photo isolators