So I've been a Sony shooter for years, mostly sticking to those tiny Samyang primes or my trusty 35mm f/1.8 because I hate carrying heavy gear when I'm out doing street stuff. But I'm heading to Tokyo in about three weeks and I'm starting to realize that swapping lenses in the middle of a crowded Shibuya crossing is gonna be a total nightmare. I want to try one of the Tamron zooms since everyone raves about their E-mount lineup lately but I'm honestly torn. I used to be a prime purist but I'm tired of missing shots because I'm 10 feet too far away or too close and don't have time to 'zoom with my feet' without getting hit by a bike.

I've been looking at the 28-75mm G2 because obviously it's the gold standard for third party glass, but is it too bulky for stealth street work? I'm using an a7CII and I don't want to ruin the compact form factor with a massive setup that makes people stare. Then there's the 20-40mm f/2.8 which seems perfect for tight alleys but might be way too short on the long end? It's like every time I find a lens I like, I find a reason it might suck for this specific trip.

Here is what I'm looking for:

• Budget is around $700-$800, maybe slightly more if it's really worth it
• Needs to be fast. I mean like instant AF because I do a lot of candid stuff
• Not a brick. I'm gonna be walking like 15 miles a day through Shinjuku
• Weather sealing is a plus because June in Japan is usually rainy as hell

I've heard the 28-200mm is surprisingly good for a superzoom but that f/2.8 at the wide end only lasts for a second right? Is the image quality actually there for high-end street shots or is it gonna look soft? I usually shoot wide open to get some separation but maybe I'm overthinking it. If anyone has used these on an a7 series body for travel and street I'd love to hear what actually stayed on your camera the most. Just can't decide if I should prioritize the reach or the constant f/2.8...