How to Choose Camera Lenses: Quick Guide to Focal Length & Aperture Differences
Source：Shenzhen Kai Mo Rui Electronic Technology Co. LTD2026-07-22
The core principle of lens selection lies in the shooting scenarios and subjects you intend to capture with your camera.
- The longer the focal length, the narrower the viewing angle and the stronger the background bokeh effect, which helps you sharply focus on your main subject such as people.
- The shorter the focal length, the wider the field of view, keeping both foreground figures and background scenery in clear focus, ideal for shooting portraits alongside landscapes.
Lenses with large maximum aperture deliver pronounced background blur and superior light intake for nighttime photography. The downside is their bulkier size and heavier weight.
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