What 45mm at f/2.8 actually gives you
45mm 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 Micro Four Thirds bodies it covers, it frames like 90mm 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 225g (7.9 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 15cm.
Filters are 46mm — worth checking against what you already own, since polarisers and ND filters at this size are reusable across any other lens sharing the thread.
Autofocus and stabilisation
Autofocus is driven by a Stepping 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.
