What does it mean to look at the equivalent focal length of the camera 25-65438+35mm today?

In other words, having a 35mm film is the standard of the camera industry.

35mm film is also called 135 film, and 135 is the film number of Kodak Company.

The camera using 135 film, commonly known as 135 camera, is the most popular film camera type before the digital camera era.

Digital cameras do not need uniform film specifications, and the sizes of sensors are different, which leads to different focal lengths of actual lenses.

In order to have a unified standard, the actual focal length of the lens is converted into the equivalent focal length of a 35mm camera, so that everyone can see at a glance and will not be confused among many different focal lengths.

The shorter the focal length, the wider the picture range and the wider the picture, and the weaker the magnification effect, so the wide-angle lens is suitable for taking landscape photos.

The larger the focal length value, the narrower the picture range. The same imaging area and narrow picture are equivalent to magnifying the distant scenery, so the telephoto lens is suitable for taking close-ups of the scenery from a distance.

A zoom lens can change the focal length of the lens by another focal length range. Numbers indicate the range of the shortest focal length and the maximum focal length of the lens used in the camera, and the focal length can be changed in this range when used.

Just look at the prices of these Sony cameras. The HX30 is the best, with the largest optical zoom, and the G lens is also the best among Sony digital cameras.

Sony card machine H series is a card telephoto machine, W series is an economical and applicable machine, and the grade with X at the back is higher.

However, with Sony's18 megapixel card machine, the noise is not easy to control, and it is no problem to enlarge the photo. Zooming in, the trace of software noise reduction is very obvious. If the requirements for image quality are high, it is recommended not to choose a model with such a high pixel. The card machine feels that pixel12 million is more suitable. If the pixel is higher, it will only do more harm than good without increasing the sensor size.