What does 4x optical zoom mean?
Zoom meaning the ability to make something distant appear closer. Consumer cameras are sold with a maximum zoom which is supposed to define how much closer. For example a camera might be 40x zoom, 4x optical, 10x digital .
An optical zoom is a true zoom lens, like the zoom lens you'd use on a film camera. They produce much better-quality images. Digital zoom: Some cameras offer a digital zoom, which is simply some in-camera image processing.
- Shooting modes fall into three categories: auto, scene, and P, S, A, and M modes. In auto and scene modes the camera controls shutter speed and aperture. P, S, A, and M modes are known as exposure modes and give photographers a choice as to which elements of exposure—aperture or shutter speed—they wish to control.
- In film and photography, a prime lens is a fixed focal length photographic lens (as opposed to a zoom lens, typically with a maximum aperture from f2.8 to f1.2. The term can also mean the primary lens in a combination lens system.
- What is the difference between optical and digital zoom? The optical zoom is achieved by using your camera's lens. The digital zoom, on the other hand, is achieved by cropping and enlarging the image once it has been captured by the digital camera's sensor.
The higher the optical zoom, the better the results. In a still camera, an optical zoom of 10x or more is called a "superzoom" lens. Note that if a still camera is advertised with "10x zoom," that does not necessarily mean optical zoom only. In many cases, the optical is 3x with the additional 7x being digital.
- White balance (WB) is the process of removing unrealistic color casts, so that objects which appear white in person are rendered white in your photo. Proper camera white balance has to take into account the "color temperature" of a light source, which refers to the relative warmth or coolness of white light.
- In photography, shutter speed or exposure time is the length of time when the film or digital sensor inside the camera is exposed to light, also when a camera's shutter is open when taking a photograph. The amount of light that reaches the film or image sensor is proportional to the exposure time.
- Our pick of the best full frame DSLRs from Canon, Nikon, Pentax and Sony
- Nikon D810.
- Canon EOS 5DS.
- Nikon D750.
- Nikon D5.
- Canon EOS-1D X Mark II.
- Sony Alpha A99 II.
- Canon EOS 6D Mark II. Canon's enthusiast-focused full-frame DSLR gets an overhaul.
- Pentax K-1. Pentax's first full-frame DSLR.
Zooms are meant to bring objects in a picture closer than they actually are. The number, 3x, 5x, 10x etc generally means the amount of magnifications that a particular lens on a camera is capable of performing.
- Zoom meaning the ability to make something distant appear closer. Consumer cameras are sold with a maximum zoom which is supposed to define how much closer. For example a camera might be 40x zoom, 4x optical, 10x digital .
- Digital zoom is a method of decreasing the apparent angle of view of a digital photographic or video image. Digital zoom is accomplished by cropping an image down to a centered area with the same aspect ratio as the original, and usually also interpolating the result back up to the pixel dimensions of the original.
- The use of photographic film was pioneered by George Eastman, who started manufacturing paper film in 1885 before switching to celluloid in 1888-1889. His first camera, which he called the "Kodak," was first offered for sale in 1888.
Updated: 4th November 2019