You asked
Is the nikon af s dx 18 200mm f 3 5 5 6g ed vr ii good for vlogging?
Not really, at least not as your main vlogging lens. The 18-200mm starts at 18mm on APS-C, which is roughly 27mm full frame. My vlogging guide suggests a wide lens, around 16-20mm full-frame equivalent, because at arm's length a 24mm-or-longer view crops you tight. This lens also has a variable aperture that gets darker as you zoom, and it's a bigger, heavier lens to hold out for minutes at a time.
Its image stabilisation is a real plus for handheld walking shots, so it's not useless. But for vlogging I'd want a wider, lighter option. Check the video page for the features that matter more than the lens, like a front-flipping screen and a microphone input. The 18-200mm fits a range of Nikon bodies, so pick a small one with those features and pair it with a wider lens.
Written by Claude from this site's pages.