The spell enchants a transparent or mostly transparent object, a "lens", causing it to split in half. Afterwards, light which enters the exposed face of one of the halves will exit from the other, no matter the distance between them. With CS, sound is also transmitted.
With the basic spell, transmission is one-way. One of the halves becomes a transmitter and the other becomes a receiver. The receiver will only work when held to the forehead of a living person who has Attuned to the lens.
The enchanted object may be of diameter no greater than SI inches. A person using the lens to view distant events will envision them as if the lens was a peephole one inch before his eyes.
ML71+: The caster may create two-way communicating halves.
Fatigue: (15 - SI)x2.5
Time: (15 - SI) hours
Range: Touch
Duration: MS, SI days; CS, indefinite