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TFT and EVF Viewfinders

What is TFT and EVF Viewfinders?

You are attempting to capture photographs with your brand new digital camera on a day with clear blue skies and brilliant sunshine.

Because of the reflection and glare, it could be difficult for you to see the image on the LCD screen on your device. As a solution to this issue, some modern cameras come pre-fitted with a TFT (Thin Film Transistor) or EVF (Electronic Viewfinder), which is essentially a little LCD screen embedded within the viewfinder.

There shouldn’t be any more issues with you being able to see what you’re about to picture, right? No, not quite like that.

Optical, Electronic and Pentaprism Viewfinders

It is necessary to grasp the differences between an optical viewfinder, an electronic viewfinder, and the viewfinder on a digital SLR camera before we delve too far into a conversation regarding electronic viewfinders (typically called a pentaprism).

Optical Viewfinders

These are the viewfinders that are most frequently found on compact digital cameras. A camera’s body often contains a small window that acts as an optical viewfinder. This window is positioned above (and occasionally to the side of) the lens.

When you look through the viewfinder of your camera, you will see something that is roughly equivalent to what the lens will see (as well as the shot that you are going to capture). Because the optical viewfinder is located at an angle relative to the lens, the region that is captured by the lens is distinct from that which is shown in the viewfinder.

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The majority of optical viewfinders suffer from tunnel vision, meaning they do not display the complete scene that will be captured by the lens. It is normal for the image that you see in the viewfinder to be different from what you see when you look at the shot after it has been taken.

Electronic Viewfinders

Electronic viewfinders do, in fact, display the exact same image that the lens captures. In point of fact, the image that you see while looking through an electronic viewfinder is the same image that you see when looking at the LCD screen on the back of the camera.

The same picture that is shown on the LCD is also projected onto a very small LCD that is located within the viewfinder.

If it displays the same information as the LCD, then what is the point of having it? Composing a picture with an electronic viewfinder is an option when the LCD screen is too bright to see, as it allows for more precise framing. Because the viewfinder is darkened, the subject of the shot that you are going to take may be seen more clearly.

On certain cameras, you have to manually activate and deactivate the electronic viewfinder. You need to select between the LCD screen or the viewfinder. Some cameras are able to detect when you are looking through the viewfinder, and in response, they activate the viewfinder for you automatically.


A pentaprism may be found inside every single digital single-lens reflex camera (DSLR), with the exception of the very few that employ electronic viewfinders.

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When you look through the viewfinder of your camera, you will see the same thing that the lens sees since a pentaprism reflects light. If the scene itself is blurry, the image that you see via the viewfinder will also be blurry.

Accurate photography may most easily be accomplished with the use of a viewfinder that has a pentaprism. The picture that you see is an exact representation of what the lens sees, and you are able to see the effects of even the most minute modifications that you make to the focus.

Electronics vs. The Human Eye

Your eye sees the scene set out in front of it whenever you look through a viewfinder, whether it be an optical viewfinder or an SLR viewfinder. The eyes have a remarkable variety of capabilities; they are able to detect minute variations in color, as well as vast differences in brightness and darkness, and changes in focus.

Gazing via an electronic viewfinder is similar to looking through the screen of a television. The colors are not as true to life, and the clarity of the photos is lacking. When you move the camera fast, visual trails will appear because the viewfinder is attempting to keep up with the action.

The resolution of electronic viewfinders (EVFs) has significantly improved in recent years, but it still cannot compete with that of the human eye. If you have experience using film single-lens reflex cameras, I would advise you to stay away from digital cameras that use electronic viewfinders. This is especially important to keep in mind if you like to focus manually, as it is quite difficult to determine whether or not your subject is in focus while looking via an electronic viewfinder (EVF).

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The Basic Rule of Thumb

When the sun is shining extremely brightly or when the LCD on your camera is obscured by other factors, an electronic viewfinder can be of assistance. The viewfinder generates an appropriate amount of shadow, which enables you to better observe your topic.

Because it is a video display, an electronic viewfinder (EVF) cannot compete with the visual information provided by the human eye.

Do not let the presence of an electronic viewfinder (EVF) turn you off from purchasing a camera if it comes with other desirable features. However, unless you are certain that you will use the electronic viewfinder (EVF) of your camera to good use, you shouldn’t go to the trouble of purchasing one. You will most likely discover that you are utilizing the LCD more often than not.

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