カメラレンズ 比較

How to choose a camera lens in 2026

The Mars Score for lenses weights optics (55%), build (35%) and mount (10%). Lens choice matters more than camera body for image quality — a great lens on a mid-range body usually beats a kit lens on a flagship. Decide the focal range first, the aperture second, and the mount last (because mount is determined by your body).

Zoom range vs prime aperture

A fast f/2.8 zoom like the Sony FE 24-70mm f/2.8 GM II or Canon RF 24-70mm f/2.8L IS USM covers most events with one lens. Fast primes (Sony FE 50mm f/1.4 GM) trade flexibility for two extra stops of light and shallower depth of field. Filter by focal_min_mm and focal_max_mm to narrow the field.

Weight is the spec photographers regret ignoring

A 1.4 kg lens on a 700 g body becomes painful within an hour. Third-party options from Sigma — the 24-70mm f/2.8 DG DN II Art — often cut 100–200 g off the OEM equivalent at a similar aperture. The weight_g column is the most underweighted spec on most reviews.

Weather sealing and stabilization

If you shoot outdoors year-round, weather_sealed is non-negotiable. has_stabilization (OIS/OSS/VR) matters most for handheld video and low-light stills on bodies without IBIS — see our glossary entry on optical vs in-body stabilization.

Mount lock-in

The mount you buy into is the platform you stay on for 5–10 years. Sony E and Canon RF have the broadest current third-party support; Nikon Z is catching up; L-mount and Micro Four Thirds are smaller but mature ecosystems. See Buyer's Guides for system-level mount comparisons.

How vsMars scores camera lenses

Mars Score for lenses weights optics first — aperture, focal flexibility — then build quality and finally mount. See the methodology page for the full weighting and Mars Labs for sharpness chart bench data.