What 30mm at f/2.8 actually gives you
30mm sits close to the way the eye takes in a scene, which is why this range tends to get used as a general-purpose focal length. On the APS-C bodies it covers, it frames like 45mm would on full-frame.
f/2.8 is the working standard for a fast lens — a stop or two of low-light headroom over a kit zoom, and noticeably more background separation.
Size, close focus and filters
At 195g (6.9 oz) it is light enough that it stops being a decision — the kind of lens that stays on the body or in the bag without thought.
Maximum magnification is 1x, meaning the subject can be projected onto the sensor at life size or larger — true macro rather than a close-focus marketing claim. It focuses as close as 10cm.
Filters are 43mm — worth checking against what you already own, since polarisers and ND filters at this size are reusable across any other lens sharing the thread. A dedicated aperture ring gives direct control without going through a camera dial, which mostly matters for video work.
Autofocus, stabilisation and weather sealing
Autofocus is driven by a Linear motor.
There is no optical stabilisation in the lens, so handheld steadiness depends on the body having IBIS, or on keeping the shutter speed up.
The barrel is weather-sealed, so rain and dust are a manageable risk rather than a reason to pack up.
