What is the use of an electronic viewfinder?

Question 1: What is the use of electronic viewfinder? Electronic viewfinder EVF (Electronic View Finder). It requires power when working and is similar to an LCD display. Its main function is to view the captured scenery when shooting with digital cameras and digital camcorders, that is, framing.

The electronic viewfinders commonly used in digital equipment are available in black and white and color, and their size is about 0.25~0.5 inches (area about 36~169mm2)

Advantages:

An electronic viewfinder is a miniature LCD placed inside the viewfinder. Due to the obstruction of the body and eye mask, external light cannot reach this miniature LCD. The field of view of the electronic viewfinder is much larger than that of the optical viewfinder. For example, the field of view of the EVF of the Sony DSC-F707 reaches 99%. The electronic viewfinder is also more practical. This viewfinder is not only cheaper, but can also be used in any ambient light. The electronic viewfinder can display the entire scene to be photographed, and can display shooting information such as aperture and shutter speed. But in addition, it can also display the camera menu, which is something that other viewfinders cannot do.

Disadvantages:

The quality displayed by the electronic viewfinder will be somewhat different from the viewfinder of a real SLR camera. The color of the image will also not be as vivid and detailed as the captured image itself due to the lower resolution.

Compared with the optical viewfinder, it requires a lot of power; similar to the LCD display, it is easy to reflect light, thus affecting the accuracy of the viewfinder; compared with the optical system, it appears rough, which is very important because Such a system cannot display the smallest details in the shooting frame, such as whether the person's eyes are open, etc.

Question 2: Is the viewfinder on the camera useful? The answer is yes------it is.

This viewfinder is generally used on current small digital cameras. Low-end, low-end and some compact and fashionable models have canceled this viewfinder in the design.

But it is still retained in some mid-to-high-end cameras.

Why What?

1. When the outdoor light is very strong and the LCD cannot be seen clearly, you can only use the optical viewfinder. Considering that today’s digital cameras are getting smaller and smaller, using an optical viewfinder brings certain inconveniences to the operation (but what you see through the viewfinder may be slightly different from the actual situation)

2. As The actual operating speed of the optical viewfinder is the fastest, while the digital LCD display will have a display time for the image. Professional machines require the fastest speed, so it is also necessary to retain the optical viewfinder.

3. When turning off the LCD to save power.

Question 3: What is a viewfinder? Hello!

The viewfinder is the window through which you use your eyes to observe the scene being photographed when shooting. Its function is to judge whether to adjust the shooting elements (such as the size of the image, distance, height, angle of view, depth of field, virtual reality, tone, light and dark, whether it is horizontal or deliberately tilted, the master and slave of the scene, etc.) by observing the scene in the viewfinder. Collocation, foil relationship, position in the image, composition, etc.).

Viewfinders are generally divided into two types: optical viewfinders and electronic viewfinders. The optical viewfinder directly observes the scenery through an optical lens, and is mostly used in SLR cameras. The electronic viewfinder uses photoelectric signals to display the image captured by the lens in the viewfinder, and is mostly used on compact cameras. Today's SLR and compact cameras generally can also view real-time views through the LCD screen.

Question 4: Is it better to have an electronic viewfinder on a SLR? Or is it better not to have an electronic viewfinder? Any SLR does not have a store viewfinder, some have optical viewfinders.

SLRs must rely on the optical viewfinder to focus at high speed. It is impossible to hold a SLR and look at the screen to take pictures like a mobile phone.

The screen will be very dark in the sun and you will not be able to see whether the exposure of the picture is appropriate, so use the viewfinder to avoid the influence of strong light.

The electronic viewfinder is on a mirrorless single-lens camera. Mirrorless and single-lens cameras are emerging high-end cameras in recent years. They have the same image quality as a SLR. The electronic viewfinder is also a small screen, which is designed to avoid forcing the camera to focus on the camera. Light affects better photography and increases the comfort of taking photos. These cameras can take pictures on the screen just like a mobile phone. There is great momentum to replace SLR.

Question 5: The function of the camera viewfinder. As the name suggests, the viewfinder is used for framing and composition. It also has focus monitoring and data information prompt functions.

Question 6: Is an electronic viewfinder needed for a digital camera? Personally I don't think it's needed. Ordering via the display is basically the same.

Unless it is a professional-level camera and some professional players will use the viewfinder you mentioned to take pictures, how can ordinary people go through such trouble when buying a camera? What do you think?

Moreover, by canceling a function, the cost of the camera can be reduced, which is also good for consumers.

Question 7: What is the difference between an electronic viewfinder and an optical viewfinder? To put it simply: electronic viewfinder is the night scene viewfinder, and optical viewfinder is the viewfinder through the eyepiece.

(Reference)

Question 8: Is it necessary to choose a mirrorless electronic viewfinder? The electronic viewfinder also consumes electricity, which is a little less than the LCD screen. It is recommended that you buy a spare battery in case it encounters The battery I was going to take photos with ran out, and I sighed while looking at the scenery. What a pity.

The optical viewfinder consumes no power.

Girls think that SLR cameras are too heavy, so let’s play mirrorless cameras.

Whether it is necessary or not depends entirely on you.

Photography equipment is the same as eating. Whether you eat a meal of 60 yuan or a meal of 600 yuan, it all depends on you. Look at the diners themselves.

Everyone can be full. There are expensive ones that you don’t like to eat, and there are cheap ones that you like to eat.

The truth is really the same. Everyone, the same person has different ideas at different times.

Let me say,

The biggest advantage of mirrorless cameras over card cameras is that they can be replaced with more professional and better lenses according to shooting needs. If you don’t want to play with lenses, it is better to buy a high-end one. Professional card machine. The portability is better than that of a mirrorless camera, and you don’t need to change lenses anyway.

Question 9: What is the difference between the electronic viewfinder and the optical viewfinder in a SLR camera? The electronic viewfinder is actually a small LED screen, placed inside the fuselage, and looks like a "viewfinder" ” look, plus a lens. The effect is the same as the large-screen LED viewfinder on the back of the camera, except that it saves more power, and because the eyes are farther apart, it is less affected by external light.

Principle: Light hits Cmos (film) through the lens, and Cmos converts the optical signal into an electrical signal and transmits it to the screen. What you see is actually a screen.

An optical viewfinder is a device that uses lenses and mirrors to refract light from the lens. Its structure is similar to a submarine's looking glass.

Principle: Light passes through the lens and into the camera. The reflector in front of the Cmos will reflect the light into the viewfinder.

The biggest structural difference between the two is whether there is a reflector. The optical viewfinder is a real "lens", while the electronic viewfinder is just a device developed to imitate the use of the optical viewfinder.

There are different advantages and disadvantages. To put it simply:

Because the SLR (optical viewfinder) has a reflector, it cannot be too small or thin, but the optical viewfinder is directly It refracts and reflects light to the human eye, resulting in soft light and a wide and bright field of view. Complete physical structure, no electricity consumption.

Mirrorless cameras have no reflectors, so the size can be reduced to a very small size. EVF belongs to "what you see is what you get", because what you see is actually the CMOS image. (Due to the field of view rate problem of SLR, what you see in the viewfinder of some low-end machines will be smaller than the actual shot, and the CMOS and After all, human eyes are different and there will be some errors in color and shading). The shortcomings are also obvious. When the lighting is bad, it is very difficult to take pictures, there will be smear (delay), and it consumes a lot of power. Comparing Nikon and Sony, both are Sony's Cmos. Cameras such as the D810 can take 1,500 pictures a day, while the A7R2 usually runs out of battery after 300-500 pictures.

Question 10: Is it better to use an electronic viewfinder or an optical viewfinder? Both electronic viewfinders and optical viewfinders are good. Each has its own use. Usually, it is customary to use an optical viewfinder to view the view and focus. It’s fast; it’s convenient to use the electronic viewfinder when taking pictures at very low angles. Current SLRs all have two viewing modes at the same time, so you can use whichever one you need.