A Look at the Shutter Modes in Canon EOS Cameras

If you shoot still images with a modern mirrorless camera, you’re probably aware of different “shutter modes” in your camera’s menu system. But on the surface, there’s little to indicate which may be preferable for different types of photography — or even what their differences are. We’ll try to explain both in the next few minutes.

Before we go any further, we need to clearly state that this applies only to still-image shooting. Video by its very nature uses exclusively Electronic Shutter operation in modern mirrorless cameras, with each frame of video recorded directly off the imaging sensor at whatever FPS frame rate the camera is set for.

One additional, important point: in all Canon EOS cameras with ability to change Shutter Mode (as of mid-2025), any Menu settings we mention here require the camera to be in a Creative Zone shooting mode — P, Tv, Av, M, or FV. If the camera is set to the green “full-auto” mode, an SCN/Special Scene mode, or other automated shooting settings, you won’t find these settings on your camera’s Menu.

A camera’s shutter is a device that can rapidly open, to expose the digital imaging sensor or film, and then close again. In the past, many cameras, including virtually all 35mm film and digital SLR cameras, used some form of “mechanical” shutter mechanism. A modern shutter is shown below:

This type of shutter is referred to as a Mechanical shutter, because actual parts physically move for it to operate. Because shutter blades are rapidly moving to expose the image sensor, and then more blades then move to cover the sensor again, there’s also a distinctive “click” sound when mechanical shutters are fired.

Decades ago, 35mm film cameras often used light-tight, flexible cloth or rubber-like materials that ran across the long dimension of the frame, instead of lightweight metal (or similar) blades. These parts got the name “curtains,” and you’ll sometimes hear photographers refer to shutter curtains. That’ll be relevant in a moment, as you’ll see.

Many — but not all — Canon EOS mirrorless cameras offer this now-traditional type of bladed shutter operation. But the important thing here is to just have a picture in your mind of how shutter operation for still images basically occurs.

Your choice (or the camera’s choice) of Shutter Mode dictates how the image sensor will be opened and capture image data in your camera. Depending on the camera you own, you will typically have two or three possible choices here:

• Mechanical Shutter

  This is the type of operation just discussed above, using moving, light-tight blades to both block the sensor from light, but then instantly open to expose the sensor to whatever you’re photographing. One set of thin blades quickly covers the sensor and immediately opens, exposing the sensor for the time dictated by the shutter speed you’re using. Then, a second set of blades falls rapidly into place, blocking the sensor again, to end each exposure.

  To be clear, for various reasons, some Canon EOS models (like the compact EOS R50 and full-frame EOS R8) do not offer Mechanical Shutter operation, and you won’t find it in their Shutter Modes menu.

• 1^st-curtain Electronic Shutter

  Instead of starting the picture-taking process with closed shutter blades which then open to expose the sensor, 1^st-curtain Electronic Shutter starts with the sensor completely open, uncovered and exposed — this is how you can view your scene in your viewfinder in the first place. But now, instead of quickly putting a covering set of shutter blades in-place and then immediately re-opening them (as Mechanical Shutter does), the image sensor itself begins to read and record the image data electronically when you fully press the shutter button. Thus, the “first curtain,” or initial action to begin recording the image, is done electronically, using no moving parts.

  However, for technical reasons, this Shutter Mode doesn’t allow you to similarly END the exposure by shutting-off the sensor electronically. Instead, a single set of shutter blades, that were retracted and out of the way, now physically move to cover the opening to the sensor. So in effect, 1^st-curtain Electronic Shutter is a semi-electronic method of shutter operation — Electronic operation to “open” the shutter, and mechanical or physical shutter blades to close and end the exposure.

• Electronic Shutter

  Sometimes casually referred to as “full Electronic Shutter,” this method by-passes any mechanical or moving parts. The image sensor begins completely uncovered, its surface exposed as you view and compose your scene. When the shutter button is fully pressed, the sensor changes operation, and again electronically begins to capture brightness data from each pixel on the image sensor, rapidly “scanning” the sensor’s surface. Once completed, the sensor now electronically stops the recording function, and resumes ordinary viewing from the sensor’s pixels.

  Because there are no moving parts with Electronic Shutter, it’s possible to take still images in total silence. Most Canon EOS mirrorless cameras do two things during Electronic Shutter operation, since by itself it’s completely silent.

  1. A white outline, or border, briefly appears in both the viewfinder and camera’s LCD screen each time Electronic Shutter fires, as confirmation to the photographer that a picture has been taken.

  2. Many recent EOS R-series models offer a “volume” Menu setting (usually in the yellow-colored Set-up Menu area) to permit a synthetic shutter sound, to give you (and even your subjects) the ability to hear a traditional click for each image you take.

The two (or three, depending on your camera model) available Shutter Modes each have distinct benefits or limitations in specific situations. Some of the major ones to consider are:

• Available shutter speeds

  For technical reasons, some EOS models offer even faster maximum shutter speeds with Electronic Shutter operation — such as 1/32,000^th second on the EOS R5 Mark II camera, vs. the normal max. speed of 1/8000^th second in other shutter modes.

  Similarly, in some models, the slowest shutter speed may be curtailed with Electronic Shutter. While all EOS R-series mirrorless models allow slow speeds down to 30 full seconds, in some models, the slowest Electronic Shutter speed available may be closer to one second.

• Drive speeds (continuous shooting rates)

  Since there are no moving parts, Electronic Shutter often provides a possible benefit here.  While the fastest frames per second rate with Mechanical or 1^st-curtain Electronic Shutter is sometimes less than 10 FPS, the same camera with Electronic Shutter active may be able to shoot (full-resolution) still-images at 20, 30 or even 40 frames per second.

• Flash operation

  Again, for technical reasons, most EOS models cannot shoot any form of electronic flash (even with dedicated Canon speedlites) with Electronic Shutter.  1^st-curtain Electronic and especially Mechanical Shutter modes do work well with flash.  The very fast image sensor read-out speeds of cameras such as the EOS R1 and EOS R5 Mark II, from their so-called stacked image sensors, do permit flash with Electronic Shutter, albeit with slightly slower maximum flash sync shutter speeds.

• Vibration or “shutter shock”

  Mechanical Shutter operation can introduce some unwanted vibration as the opening set of shutter blades fully open. This varies depending upon the camera, but in some models (especially at slower shutter speeds), it can be enough to produce slight image softness or blur from camera vibration — even if the camera is tripod-mounted. 1^st-curtain Electronic and especially Electronic Shutter operation can offer a distinct advantage here, especially when photographers are using modest shutter speeds.

• Rolling shutter distortion

  Even though Electronic Shutter seems to have some big advantages for action shooting, sports and so on, there can be one important limitation: the potential for what’s called rolling shutter distortion. When this occurs, any fast-moving subject in the scene — even if captured at a fast shutter speed like 1/2000^th or 1/4000^th of a second — can have an unusual skewed, bent or distorted appearance.

• Artificial light — especially LED and fluorescent light sources

  Another Electronic Shutter characteristic is possible “banding,” flickering, or uneven exposures of subjects that are lit by modern LED lighting, or conventional fluorescent indoor lights.  This is very dependent upon the actual light fixtures in use, so it can be hard to generalize about this, unless test shots are taken in that specific environment ahead of time.  Again, higher-end models like the EOS R5 Mark II, with faster image sensor read-out speeds, can minimize this or in some cases, eliminate it.  This isn’t a problem with Mechanical Shutter, and in most cases, 1^st-curtain Electronic Shutter likewise minimizes or eliminates the possible problem.

• Uneven out-of-focus highlights, or “bokeh”

  With 1^st-curtain Electronic Shutter, this can occasionally crop up in shots taken at very wide lens apertures, using fast shutter speeds in daylight. Portrait photographers looking for that maximum out-of-focus background look can sometimes find that the expected round, out-of-focus background highlights can appear to be softly cut-off at the bottom half each out-of-focus highlight. Switching to either Mechanical or Electronic Shutter operation will eliminate this (admittedly rare) phenomenon from occurring.

Any answers here must be general in nature, and photographers are free to work with any Shutter Mode in their cameras that they feel comfortable with — or, comfortable experimenting with. But here are a few possible starting points:

This can seem confusing, because it appears as an additional Menu item along with Shutter Mode in the red Shooting Menu of some Canon EOS models. This separate Silent Shutter function overrides your choice of shutter mode, doing the following:

• Switches the camera to Electronic Shutter operation, with any available Volume set to “zero”

• Simultaneously turns off other sound sources, especially confirmation beep tones for things like One-shot AF confirmation, self-timer countdown, and so on

• All continuous Drive speed settings, AF operation settings, and so on remain selectable in your camera’s Menus

Choosing a shutter mode is another benefit in modern interchangeable lens mirrorless cameras. While this is often something users won’t need to constantly change or adjust — the default setting on most EOS R-series cameras is 1^st-curtain Electronic Shutter, which is a versatile setting — once you understand the potential benefits of Electronic Shutter, and (if it’s available on your camera) Mechanical Shutter, you can optimize your still-image shooting for the type of scene and situation you’re photographing. No one Shutter Mode is always best, so getting comfortable with your options is a great step forward in being in full control of your camera, and its images.