viewfinder

A Viewfinder is a "window" where the photographer looks at the subject he wants to photograph. Below we will introduce four kinds of digital cameras commonly used viewfinder.

• Optical viewfinder The optical viewfinder on a compact digital camera consists of a set of simple optical elements that are connected to the lens's optical system, allowing the images in the optical viewfinder to be synchronized with the effects of entering the lens. This viewfinder is compact, but the biggest problem is the framing error. The viewfinder is usually placed above the lens. The image seen from the optical viewfinder is different from the image that the lens is projecting on the sensor. This "parallax" is more obvious in short-range shooting. A typical optical viewfinder only allows the user to see 80% to 90% of the actual coverage of the lens. If you want to accurately view, it is better to use a parallax-free LCD. When wearing an optical viewfinder, it's best to look at the diopter adjustments next to the viewfinder. If anything, it will be a lot easier.

· Non-professional digital camera's LCD viewfinder The small digital camera's LCD view allows the user to observe the desired image in real time. This image is the same as the image that the lens projects on the CCD, and no parallax will be generated. This framing method is also called "Through-The-Lens" for framing through the lens. But we know that using the LCD to view the picture is very power-consuming, and when the sun is fierce, we can hardly see the picture on the LCD. This prompts us to use an optical viewfinder or an EVF viewfinder as will be discussed below. In addition, the LCD on the digital SLR is not used for framing. It allows users to view photos and operate menus on the LCD after shooting. Of course, the DSLR has its own way of viewing, which will be described below.

· Optical viewfinder (TTL) on digital SLR

The digital SLR, which also uses an optical viewfinder, has no viewing parallax because its optical viewfinder is more precise than a compact digital camera, and its principle is to attach a mirror and prism to the sensor, and the lens is projected onto the sensor. The image is the image seen on the TTL. When the photographer presses the shutter, the mirror will bounce, the light enters the sensor through the lens, and the sensor begins to expose. Due to the limitations of sensors, most digital SLR LCDs can only be used for viewing photo playback and not for shooting. Next to the DSLR optical viewfinder, there will usually be a small LCD display of the camera settings and status, such as aperture shutter, exposure compensation, and white balance.

· The EVF electronic viewfinder on a digital compact camera actually transmits the screen on the LCD to the electronic viewfinder of a digital camera. Therefore, the image seen from the EVF is the same as the image shot onto the CCD, and it is the same as the LCD. On the image synchronization. Basically, the EVF is a small LCD above the lens (about 0.5" in diameter and about 235,000 pixels). It allows the user to view the scene more accurately, especially under strong light. Difficulties in framing, EVFs have incorporated the benefits of the digital SLR TTL viewfinder, such as no parallax, but cameras equipped with EVFs cannot be retrofitted with optical viewfinders.