The optical design meant that this was the smallest lens on the system.

The book was published in 1979 and represented the state of the art in optical design at that time.

In those days optical design was very much a group effort.

The aperture stop is an important element in most optical designs.

In optical design, an alternative is often needed for systems where the object is not far from the lens.

This lens features advanced optical design with rear focus mechanism.

The main change saw the lens adopt a new optical design featuring 16 elements in 12 groups.

Manufacturing costs and delivery schedules are also a major part of optical design.

You'll also get some streakiness because of the optical design.

The Zeiss company was responsible for many innovations in optical design and engineering.