>>4018639So it's important to consider the differences in FL (focal length) and A (aperture) when comparing across different sensor formats. For the sake of convenience, I'm only going to reference in terms of a full frame camera. Wider isn't necessarily better.
You really can do landscape shots with any FL. Picrel (more nature shots than landscape) shows different shots at 24mm, 35mm, 50mm, 85mm.
Most cell phones are around 28mm, so if you've often felt the need to go wider, consider that. If you've felt the need to zoom in a little, consider that too. Wider lenses will let you capture more, but distant objects (mountains) will appear smaller, and they also have a benefit with the reduction of star trails. Telephoto lenses are better for capturing specific things like a mountain or wildlife, and can make it easier to exaggerate star trails (if that's the look you want).
Aperture will come into play in two main ways. The first is with subject isolation, for when you like the aesthetic of a certain feature (flower for example) being crisply in focus, and everything else falling into a blur. The second is with light gathering, where if you're shooting in lower light (stars especially), you'll be able to use a lower ISO for less noise, or use a faster shutter speed to avoid movement like handheld camera shake or star trails.
Every brand / system is totally capable for general landscape shooting, but each has their pros/cons. Larger sensors give you less noise for lowlight shooting / stars, but m43 cameras have great stabilization for handheld shooting, some have built-in image stacking for higher resolution, etc. Really can't go wrong with any of the systems nowadays.
I've slowly transitioned to doing most of my landscape stuff with 18mm to 24mm, and now 28mm. If I need to go wider than 28mm, it's usually easy enough for me just to take 2-3 shots and stitch them together later.
