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You are too conscious of the soft focus lens and of the anastigmatic lens.

There is no country in which an anastigmatic lens is of more use to the photographer than Alaska, and every camera with which it is hoped to take winter scenes should have this equipment.

The two distinct types of lenses are the "rapid rectilinear" and the "anastigmatic," which names refer to their optical properties in distributing the light.

The lens should be a modern anastigmatic by a good maker.

Systems in which the two astigmatic surfaces coincide are termed anastigmatic or stigmatic.