What 28-400mm at f/4 actually gives you
28-400mm 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.
f/4 is a moderate maximum aperture. There is less low-light headroom and less background blur than an f/2.8 lens gives, which is generally the trade for lower weight and cost.
Size, close focus and filters
At 725g (1.60 lb) it has real presence on the front of a camera, though it stays hand-holdable for a session.
Maximum magnification is 0.33x, enough for close-up work on flowers or detail shots without reaching genuine macro reproduction. It focuses as close as 50cm.
Filters are 77mm — 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.
Optical stabilisation is built in, which stacks with in-body stabilisation on bodies that have it and does the work alone on bodies that do not.
