What is the best landscape lens for Canon EOS R5?

Honestly, for hiking around Zion, the Canon RF 14-35mm f/4L IS USM is the more practical choice. Landscape photography usually happens at f/8 or f/11 to ensure a deep depth of field, so the f/2.8 aperture often goes unused during daylight hours. Carrying that extra weight of the Canon RF 15-35mm f/2.8L IS USM on long desert hauls can lead to fatigue, which is a real safety concern when you are navigating steep trails. That 14mm focal length is also surprisingly helpful for capturing the sheer scale of the canyon walls. While the f/2.8 is technically better for astro, the R5 sensor is clean enough to handle slightly higher ISOs if you want to try some star shots at f/4. Keeping your pack light and staying mobile is usually the better move for a successful trip. I always prefer reliability and weight management over features I wont actually use in the field.

To add to the point above: corner sharpness is a valid concern on the R5. In my experience, the Canon RF 14-35mm f4L IS USM is the sweet spot for Zion.

• Grab a Canon RF 16mm f2.8 STM for astro; its tiny.
• Use a Peak Design Carbon Fiber Travel Tripod for stability. Dont skip the tripod, its safer than trying to balance on a ledge for a shot.

Just saw this. In my experience, Canon RF 15-35mm f2.8L IS USM has better corners. The Canon RF 14-35mm f4L IS USM distorts at 14mm. Check Laowa 15mm f2 Zero-D too.