What 50-250mm at f/4.5 actually gives you
50-250mm 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 75mm would on full-frame.
f/4.5 is a slow maximum aperture, so this leans on good light or on a stabilised body.
Size and filters
At 405g (14.3 oz) it sits in the middle for handling: substantial enough to feel planted, light enough not to dominate the kit.
Filters are 62mm — 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.
