Understanding M/A and M on Nikkor 50mm Lenses

Nikon lenses come with various settings and legends that can sometimes be confusing for photographers. Two common settings on the Nikkor 50mm lens are M/A and M. This article will help you understand these terms and how to use them effectively in your photography.

What is M/A on a Nikkor 50mm Lens?

M/A (Manual/Auto) stands for Manual/autofocus, as the name suggests. This setting allows you to control the focus between Manual and Autofocus modes. When the lens is set to M/A:

You can use the autofocus function to allow your camera to focus the lens automatically. You also have the option to manually override the autofocus by using the focus ring. This flexibility is particularly useful for fine-tuning focus in various scenarios without having to constantly switch between modes.

For example, if you're shooting a bird and need to ensure the bird is in perfect focus, you can start with autofocus to get the initial focus and then manually adjust it to eliminate any elements such as grass in the foreground that might distract from the bird.

What is M on a Nikkor 50mm Lens?

M (Manual) stands for Manual Focus Only. In this mode:

The autofocus function is disabled completely. You will need to manually use the focus ring to achieve focus.

This setting is useful in situations where you want complete control over the focus, such as night photography or when there is insufficient contrast for the camera's autofocus system to lock onto the subject.

M/A vs. M: Practical Applications

The M/A and M settings on a Nikkor 50mm lens offer photographers different levels of flexibility and control:

Autofocus with Manual Focus Override

The M/A setting is especially useful when shooting in challenging conditions, such as obstructions or low light. You can use the autofocus to get a preliminary focus and then manually fine-tune the focus to your desired subject. This can be invaluable when shooting wildlife or action scenes where the subject is moving unpredictably.

Pure Manual Focus

The M setting is great for situations where you need absolute control over the focus. This is common in macro photography, where precise focus is crucial, and in low-light conditions where contrast may be insufficient for autofocus.

Why M/A is Better for the Decisive Moment

Even though the M/A and M settings give you more control over the focus, they are designed to be user-friendly and efficient. The M/A mode, in particular, allows you to quickly adjust the focus without constantly switching modes.

Consider the 18-55mm kit lens, where you would need to flip a switch on the side of the lens to switch between manual and autofocus. Or with an old lens like the AF AF-D, you would need to flip a switch on the camera body and possibly disengage a clutch on the lens itself. These maneuvers can distract you from the critical moment you have captured and want to freeze.

The M/A setting on a Nikkor 50mm lens provides a seamless experience. You can use the autofocus to get a preliminary focus and then manually fine-tune it, all while maintaining your attention on the subject.

Additionally, some older lenses or cameras may have additional steps or complexities to switch between focus modes, which can be a distraction. The M/A mode simplifies this process and ensures you can stay focused on the shot you want to take.