Camera Lenses

Match the lens mount to your camera body, choose focal length based on subject (wide for landscapes, standard 35–50mm for general use, telephoto 85mm+ for portraits and distant subjects), and consider aperture for low-light performance and depth of field—wider apertures (lower f-numbers) let in more light and blur backgrounds more

Aperture controls light and depth of field: a larger aperture (smaller f-number) yields brighter exposure and shallower depth of field, which helps in low light and portrait separation, whereas smaller apertures (larger f-numbers) increase depth of field for landscapes but require more light or slower shutter speeds

Verify physical mount compatibility and whether the lens supports autofocus and in-camera metering on your body; also check for image stabilization (optical or in-lens) if your camera lacks in-body stabilization, and confirm firmware update options if you need improved performance over time

Budget lenses often cost significantly less than professional glass and can deliver good results, but common trade-offs include smaller maximum apertures, less refined coatings, slower or less accurate autofocus, and heavier plastic construction compared with higher-end lenses

Keep lenses capped front and rear when not in use, store them in a dry, padded case or camera bag, clean glass with a blower, microfiber cloth and lens solution as needed, and avoid exposing lens elements to extreme humidity or direct sunlight for long periods

Prioritize mount compatibility, focal length, maximum aperture, optical stabilization, autofocus type and speed, weight and size, build quality, and sample image sharpness and bokeh from trusted reviews; focus on the specs that impact your typical shooting scenarios