I'm leaving for a two-week photography trip to Iceland in literally ten days and I'm freaking out a little because I still haven't settled on a wide angle lens for my 5D Mark IV. I've been using the old 17-40mm f/4L for years and it was fine on my old body but it just isnt cutting it anymore on this sensor and the edges are just totally mushy no matter how much I stop it down. For this trip I want something that is going to give me that crazy crisp detail you see in those big gallery prints like I want to be able to see every individual rock on a cliff face when I'm pixel peeping.
I've been doing some research online and everyone keeps talking about the Canon 16-35mm f/2.8L III and how it's basically the sharpest wide zoom they've ever made but then I go on some other forums and see people saying the Sigma 14-24mm f/2.8 Art is actually much better optically and has less distortion even if it is a huge heavy brick of a lens. My budget is around $1500 or so but if there is something like a prime that just blows everything else out of the water I could probably squeeze out a bit more cash but I really prefer the flexibility of a zoom for hiking.
I'm also really worried about the Sigma not taking standard front filters though because I really need my polarizers and NDs for the waterfalls and the black sand beaches. Is there a hidden gem I'm missing or maybe a Zeiss prime that is worth the extra weight and money? Or should I just bite the bullet and get the Mark III Canon? I've seen some stuff about the Tamron 15-30 G2 as well but I've had weird issues with third party glass before. I just need to make a decision by tomorrow so I can get it shipped before I head to the airport. What is actually the absolute sharpest glass I can put on this body for big landscape shots?
If you're chasing that gallery-grade sharpness on a 5D IV, you should probably just grab the Canon EF 16-35mm f/2.8L III USM. Looking at the technical data, the corner resolution is a massive jump over your old 17-40mm or even the older f/2.8 version II. It takes standard 82mm filters, so you wont have to lug around those massive, expensive square filter holders that the bulbous Sigma 14-24mm requires. Quick breakdown for your trip:
- 16-35mm f/2.8L III: Sharpest wide zoom Canon makes for EF, fully weather-sealed for Iceland spray.
- Canon EF 24mm f/1.4L II USM: If you can live with a prime, this thing has incredible micro-contrast for those rock textures.
- Breakthrough Photography 82mm X4 CPL: Best polarizer for keeping those Icelandic colors natural without a weird color cast. Buying used could keep you right around that 1500 dollar limit since new ones are still pricey. Honestly, the 16-35 III is the gold standard for a reason. Its basically the perfect balance of resolution and usability. Just get it and start packing.
To add to the point above: I've found most wide zooms to be pretty disappointing regarding edge-to-edge consistency on the 5D IV. If you're serious about those gallery prints, the Canon EF 16-35mm f/4L IS USM is actually sharper than the f/2.8 version for stopped-down landscapes and fits your filter needs perfectly. For a real step up, the Zeiss Milvus 21mm f/2.8 ZE is basically unbeatable, even if manual focus is a bit of a hassle.
If you want the absolute sharpest results for a sensor like that, you might actually be looking in the wrong place with those heavy zooms. I've been in your shoes and honestly, it is a super stressful place to be right before a flight. A few years ago, I prepared for a high-stakes trip to the Alps and went through a similar crisis. I felt that my existing kit was holding back the potential of my sensor, so I invested heavily in what was widely considered the top-tier wide-angle zoom on the market at the time. Unfortunately, the performance in the field was not as good as expected. While the center was decent, the peripheral sharpness was truly disappointing for a lens at that price point. I had issues with significant barrel distortion and soft corners that made my horizon lines look messy. I tried to be methodical about testing the gear before I left, but the real-world results were still frustrating. I struggled with a specific filter mounting system for that lens that was meant to solve the flare issues, but it was prone to light leaks and was just incredibly fiddly in cold weather. It actually ruined several sunrise sessions for me. After that trip, I basically realized that for large-scale printing, the zoom I bought just couldn't compete with a dedicated prime. I eventually switched to a manual focus prime that I still use today, and the resolution is worlds apart. The level of micro-contrast and edge-to-edge clarity finally matched what I saw in those big gallery prints. My advice is to be wary of the hype around zooms if you are truly pixel peeping for fine rock textures.
