To correct this, these lenses use extra pieces of glass, adding weight and mass.

Factors like these tend to be more important in making interesting photographs than in figuring out which lens to use.

The lens had an f/8 stop and used a 1/400 second shutter speed, and could photograph a golf ball from an altitude of 45,000 feet.

There are also contact lenses, which are tented, used to filter light.

Also used a deep blue lens on the Luma-lite.

The lens uses an internal focusing system, powered by a micro motor.

But even in his more technical discussions of subjects like which lens to use for what purpose, he is amiable and chatty.

Some fisheye lenses use a stereographic projection to capture a wide angle view.

The lenses use cheap, organic dye to provide this clean energy.

The lens uses internal focusing and a silent wave motor to focus.