What is the difference between fixed focus and zoom flashlight?

1. First of all, judging from the appearance, the fixed focus is generally shorter and has only one zoom ring, while the zoom has one more focus ring. The advantage of fixed focus over zoom is that the image quality is better and the aperture is easier to enlarge.

2. The problem with fixed-focus lenses is obviously that they are "troublesome to use". You can only change the viewing range by changing the distance between the camera and the subject, which means "shooting different shots". The only way to escape the scenery is by walking." The zoom lens is very convenient. You can change the scene by twisting the lens while standing still.

3. A major problem with zoom lenses is image distortion. Any zoom lens with a wide angle end will be distorted. Prime lenses have little or almost no distortion problem in this regard. When shooting with a zoom lens, the picture always feels a little blurry. Fixed focus does not have this problem, the picture is very sharp. ?

Extended information:

Benefits of fixed-focus lenses

⒈Fixed-focus wide-angle or standard lenses are generally larger in diameter than zoom lenses covering the corresponding focal length range . The aperture of general fixed-focus wide-angle and medium-focus lenses is above 2.8, which has a large amount of light and is convenient for shooting in low-light situations.

⒉ Fixed-focus wide-angle lenses generally have a shorter minimum focusing distance than zoom lenses covering the corresponding focal length range. For example, the shortest focusing distance of EF17-35 is 0.42m, while the shortest focusing distance of EF20/2.8, EF24/1.4, EF28/1.8, and EF35/2 is all 0.25m.

There are many benefits to having a small minimum focusing distance, especially for wide-angle lenses. A short focusing distance means that you can get very close to the subject and get a large image. And combined with their large apertures, they can achieve wide-angle background blur effects that are not easily achieved with zoom wide-angle lenses.

⒊Fixed wide-angle lenses are generally smaller and lighter than zoom lenses covering the corresponding focal length range. This will make your camera less glaring and easier to capture.