Honestly you should totally grab the Panasonic Lumix S PRO 16-35mm f/4! I used it for a mountain trek and it is just fantastic because its so light and reliable. Since you are shooting landscapes, you really wont miss f2.8 anyway! Its way safer for your back on long hikes and fits your budget perfectly. I love it!

Honestly, if youre worried about weight and the budget, I have been super satisfied with manual glass for landscapes lately. Tbh manual focus is no big deal for mountains.

• Venus Optics Laowa 15mm f2 Zero-D L-mount is tiny and handles flare like a champ.
• Venus Optics Laowa 10-18mm f4.5-5.6 Zoom L-mount is super light for those long hikes. Since youre usually at infinity anyway, these are safe, reliable choices that wont break the bank.

Hey there, saw your post and wanted to chime in before you drop the cash. Quick question tho... are you planning on doing any star photos or astrophotography while youre out there in Glacier? If you are just doing daytime landscapes, that f/4 fear is probably unnecessary since you will likely be stopped down to f/8 or f/11 anyway. But if you want stars, then yeah f/4 is gonna be a struggle. Since youre on a budget and worried about weight, you might want to consider these options instead:

• Sigma 16-28mm f/2.8 DG DN Contemporary for L-mount. This is way lighter than that 14-24mm brick and still gives you that f/2.8 speed for around $900. It is a internal zoom too so it stays balanced on the camera.
• Sigma 20mm f/2 DG DN Contemporary L-mount. If you dont mind a prime lens, this thing is tiny, super sharp, and leaves extra cash in your pocket for a decent tripod. Just be careful with that 14-24mm Art lens because you cant use standard screw-on filters easily without a bulky adapter. For landscapes, not being able to easily pop on a polarizer is a huge pain.