50 mm OD (1 31/32") Iris Diaphragm

Cameras are devices used to capture still images or videos. They come in a variety of shapes and sizes, from small digital cameras to large professional cameras. Most cameras use a lens to focus light onto a light-sensitive surface, such as film or a digital sensor. The captured image is then stored on a memory card or other storage device. Modern cameras often include features such as autofocus, image stabilization, and built-in flash. Digital cameras also allow users to edit and manipulate images before printing or sharing them online.

A microscope is a scientific instrument used to magnify objects that are too small to be seen with the naked eye. Microscopes use lenses to magnify objects, allowing scientists to study them in detail. Microscopes are used in a variety of fields, including biology, medicine, and engineering. They are also used in research and development, as well as in manufacturing and quality control. Microscopes come in a variety of types, including optical, electron, and scanning probe microscopes. Each type of microscope has its own advantages and disadvantages, and is used for different purposes.