How to choose high-quality camera lenses?

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The shooting theme determines the focal length selection
Portrait photography: Recommended 50mm (head) or 85mm focal length, the former is suitable for environmental portaits, while the latter can balance background blur and facial features; The large aperture (F1.4-F1.8) can create a shallow depth of field effect. ‌
Landscape photography: requires a wide-angle lens (such as 24mm or wider) and a small aperture (F4 or above) to achieve a greater depth of field. ‌
Documentary/Wildlife: Long focus (such as 200mm or more) facilitates zooming in on the subject, and a constant aperture (F2.8 or more) ensures low light performance. ‌
Aperture and imaging quality
The large aperture (F1.2-F1.8) can improve the stability of low light shooting and produce stronger background blurring effects; A small aperture (such as F4) is suitable for landscape photography and can increase the depth of field range. ‌
Lens structure and brand adaptation
Full frame camera: prioritize choosing a full frame lens to avoid image quality cropping; When using a full frame lens with a half frame camera, it is important to pay attention to the focal range conversion. ‌
Brand matching: Canon users can choose RF mount lenses (such as the Seven Craftsmen RF55mm F1.4), while Sony users recommend the E-mount GM series (such as the FE 50mm F1.4 GM). ‌
Highly cost-effective recommendation
Portrait: Sony FE 50mm F1.4 GM (approximately ¥ 8000), Sigma 85mm F1.4 DG DN Art (approximately ¥ 3500)
Scenery/Travel: Sony FE 24-70mm F2.8 GM II (approximately ¥ 12000), Sigma 16mm F1.4 DC DN Contemporary (approximately ¥ 2800)
Long Focus: Sony FE 70-200mm F2.8 G Master OSS (approximately ¥ 18000), Sigma 150-600mm F5-6.3 DG DN OS Sports (approximately ¥ 6800)
It is recommended to prioritize core indicators such as optical structure optimization, focusing speed, and imaging sharpness based on the size of the equipment, budget, and main shooting scenarios. ‌