The lens has the great advantage of always being in focus and it is a useful aid to the natural sight in the examination of hanging pictures, the architectural features of building s, and similar objects.
It is a useful aid to one's natural sight when examining hanging pictures, the architectural features of building s, and similar objects. The lens has the great advantage of always being in focus.
The lens has the great advantage of always being in focus. It is a useful aid to one's natural sight when examining hanging pictures, the architectural features of building s, and similar objects.
The lens has the great advantage of always being in focus. It is a useful aid to one's natural sight when examining hanging pictures, the architectural features of building s, and similar objects.