Your experience with DX and full-frame Nikon lenses will of course inform your opinion, but I'd suggest that you just get to know your new Sony while using a simple prime lens. Yes, I know the new Sigma isn't particularly fast*, but the samples of the new lens (which should be available in about 2 weeks) make the bokeh look good if not overwhelming; it's small, it seems to be of high quality, and it's light--and it might be better (perhaps at focusing, at least) than the faster but similarly-new Samyang competitor.
If you're committed to a zoom (and I say this as someone who lugged a Nikon 2.8/24-70 around for years--and who will no longer do so) you might consider how much you're willing to carry while traveling, and how many lenses you'll be willing to carry--given that you said that you "like light weight". Several attractive zoom options have been suggested, but you may (sooner or later) want to or feel that you need to supplement the suggested zooms, including the nice and relatively light Tamron 28-75 (would you want both a wider and a longer lens?); the Sony 24-105 (do you need a faster midrange lens--or would an f/4 zoom suffice for your needs while traveling?); the excellent but heavier Sony 24-70 (would you want a longer lens?), etc. Etc.
You might find that a wide zoom might plus a normal lens might suit you better than a general-purpose zoom while traveling, but in any case a smallish walk-around lens might be useful.
For the present, you might try adapting some of your Nikon lenses to the Sony. (I know, I know.)
*Your A7III is a high-ISO monster.
Last edited:
