Camera lens componentsand functions

In front of the first optical lens, there is a small ring with screw threads cut into it. These threads allow for filters and other accessories to be easily attached to the front of the lens.

The lens is attached to the camera at the lens mount ring by lining up small dots on the camera body and the lens. The lens is then gently rotated into place. The lens mount also contains contacts that will match up with contacts on the lens ring mount to allow the camera to control the lens.

On the front of a camera lens there is a glass lens that focuses light into the camera body and onto the film. Inside the lens body, there are several other optical lenses that further refine the image. These lenses are sometimes called "elements".

Camera lensparts diagram

The aperture ring on a lens allows the photographer to control the aperture within the lens. These settings are marked on the lens using f/stops. On automatic cameras, the aperture can only be controlled through the camera body's f/stop settings.

The focus ring is usually marked with guide numbers showing how far away a subject is when it is focused. You will also notice f/stops on this scale, that tells you the full range of the focusing distance. In other words, objects within that range will fall into focus using that particular f/stop.

Digitalcamera lens components

Lenses are often described by their focal length. For example, a lens may be called a 70-300mm lens. This indicates that the lens can zoom anywhere from 70mm to 300mm.

A larger opening of the aperture (e.g., f/2.8, f/3.5, f/4.0) results in less light needed to expose the image and shallower depth of field (less of your image is in focus). A smaller opening of the aperture (e.g., f/11, f/16, f/22) results in more light needed to expose the image and wider depth of field (more is in focus).

Camera lensparts and functions

Camera lens componentsdiagram

Camera lenses vary greatly in many respects, from the length and zoom capabilities to the extra functions like image stabilization. However, every camera lens shares the same basic structure and elements. Understanding each of these pieces can help you get to know how your photography equipment works and what to look for when shopping.

Camera lens componentsexplained

Each lens carries a second millimeter ("mm"—e.g., 49mm to 77mm) rating that tells the diameter of this front attachment point. You will need to shop for filters, lens caps, and other lens accessories using the size designated for that particular lens.

Liz Masoner is a professional photographer and she shares her tips and techniques on photo editing and how to photograph nature, portraits, and events with film and digital cameras. Liz has over 30 years of experience and she is the author of three books on photography.

MIXBOOK is a digital swatchbook that enables users to pre-visualize their gel and LED colours, and then communicate those colour choices with other members of their team. MIXBOOK contains the same LED technology found in MIX® fixtures, which will ensure perfect colour matches between their MIXBOOK and any MIX lights they have on set.MIXBOOK is controlled by the myMIX™ app. Through the app, users can generate their desired colour by adjusting hue, saturation, and intensity levels, or by selecting xy values, and then send that colour to MIXBOOK. Through a Bluetooth connection with the myMIX app, MIXBOOK enables users to actively explore the performance of their colour choices in an environment, and continue to modify it through the app. Once the desired colour has been achieved, users can save their colours to the cloud and share them with their team.

Each lens has a focusing ring. This is a section of the lens that rotates to allow the photographer to focus the image. On automatic cameras, this ring is moved by a small motor within the lens whenever you press the shutter release button halfway down. For manual focus, you will turn the ring until the image comes into focus.

The lens mount is a metal area that has been machined into a particular shape to fit a specific camera body type. Each camera manufacturer uses a different lens mount design. Some have changed lens mounts over the decades so older manual camera lenses will not fit on newer SLR and DSLR cameras. When buying lenses, you must ensure the mount matches your camera.

Aperture refers to an adjustable opening in the lens used to allow light onto the film or digital surface. The size of the aperture is measured by the f/stop setting.