hey!! i was in your exact shoes last year before a big trip and honestly you 100% want the Tamron 28-75mm f/2.8 Di III VXD G2 for your a7iv. it fits right in your budget and is seriously amazing for travel! to answer your question about the f2.8 thing... basically that number is the aperture. a lower number like 2.8 means the lens opens up wider to let in more light. this is super important for italy because you will be inside dark churches or taking photos at dinner and you wont even need a flash. it also gives you that beautiful blurry background everyone loves. this lens is way lighter than the pro sony versions too so your neck wont hurt after walking miles. i use mine for everything and it stays on my camera 90% of the time. you are gonna have a blast!!

This. Also, if you want something with more reach for architecture and landscapes in Italy, you should look at the Tamron 28-200mm f/2.8-5.6 Di III RXD. It is honestly a beast for travel photography because it covers almost every focal length you could ever need without switching lenses. Here is the technical breakdown on why this works so well:

• The aperture range of f/2.8 to f/5.6 gives you great versatility. You get that bright f/2.8 at the 28mm wide end for low-light shots in cathedrals.
• It weighs way less than those heavy professional f/2.8 constant zooms, so your neck will thank you after walking around Rome all day.
• The optical design is incredibly sharp for a superzoom, matching the high resolution of your a7iv sensor perfectly. Don't worry about the f-stop numbers too much right now. Just know that a smaller number lets in more light, which is fantastic for those sunset shots. Grab this lens and you wont have to stress about missing a shot because you were changing gear!

Honestly, dont stress the numbers too much. I remember my first trip abroad with a nice camera, I packed way too much gear and just ended up annoyed lugging it around every single day. I eventually stopped carrying a bag entirely and just kept one lens on the camera, and my photos actually got way better because I wasnt distracted by swapping glass. Before you drop that grand, tell me a bit more:

• Are you planning to shoot mostly inside old churches or are you more into big street scenes and landscapes?
• How much are you actually willing to carry around for 8+ hours a day? In my experience, the best gear is whatever you actually have with you when the perfect shot happens. I spent years buying stuff I thought I needed based on specs, but half of it just gathered dust. Once you answer those, I can help you figure out if you really need to spend the whole budget or if you should save some for food in Italy!