I rarely post around here—I usually just lurk to see what people are complaining about—but I had to chime in because that vignetting talk is usually just people using the wrong mounts. If you try to put old glass on the Apple iPhone 17 Pro Max, it’s going to look like trash because that sensor is huge, but the new stuff is solid. Since you’re a beginner with $300, here’s how the big names actually stack up for travel vlogs:

• Moment T-Series 1.33x Anamorphic Lens: This is the one everyone talks about for a reason. The flares are beautiful—very JJ Abrams—but you absolutely have to use the T-Series mount. If you use the old M-Series, it won't clear the lens edge. It’s great, though honestly, the plastic interface on the mounting plate can wear down if you’re constantly swapping lenses in the heat.
• Sandmarc Anamorphic Lens
• Cinema Edition: I personally prefer these because—wait, no—I mean, the glass quality is nearly identical to Moment, but the 17mm thread mount feels way more "pro" and secure. It’s made of machined aluminum and doesn't feel like it’s going to snap off when you’re hiking through a crowded city.
• Beastgrip Pro Series 1.55X Anamorphic Lens: If you want to go full filmmaker, this is the best glass, but it's heavy. It requires a dedicated rig—which might be a bit much for a beginner—but the squeeze factor gives you a much wider, more epic look than the 1.33x versions. Get the Sandmarc if you want something rugged for travel; it’s just more reliable when you're out in the field and don't want to worry about your lens falling off.