So I finally pulled the trigger on the R7 after years with my trusty 90D and man the autofocus is just insane. I'm super hyped for my trip to the Everglades in three weeks but I'm hitting a bit of a wall. I've been using my old EF 100-400mm L II with the adapter and while it was a beast on my DSLR it feels... off? Maybe it's the 32.5MP crop sensor being so picky or maybe I'm just seeing some weird shutter shock issues but my bird-in-flight shots aren't as crisp as I expected.
I have about 2500 bucks saved up for a native RF lens because I'm starting to think the adapter might be adding just enough weight or lag to mess with me. I was looking at the RF 100-500mm but then I see people talking about the 200-800mm or even those f/11 primes which seem way too slow for dawn or dusk. I need something that can handle fast movement without being a total brick to carry through the swamps all day long. Since the R7 has such high pixel density it really shows every little flaw in the glass and I'm worried my old EF stuff just isnt cutting it anymore. What are you guys actually using for serious wildlife on this body specifically to get the most out of that sensor?
The R7 sensor is basically a lens torture test due to that 3.2um pixel pitch. If you can find a deal, the Canon RF 100-500mm f/4.5-7.1 L IS USM is the gold standard for this body.
- Nano USM motors handle the R7 autofocus way better than EF tech
- L-series glass resolves way more detail for those dense pixels
- Way better balance without the adapter Its amazing for birds!
I saw your post this morning and honestly, that R7 sensor is a double-edged sword. Since you are headed to the Everglades, you gotta be careful with the weight of something like the Canon RF 200-800mm f/6.3-9 IS USM. It offers insane reach, but carrying that beast through humidity and muck is a workout, plus f/9 at the long end might push your ISO higher than you want when the light drops under those thick cypress canopies. If you are worried about the off feeling with your EF glass, it might actually be diffraction or shutter shock. The R7 hits the diffraction limit really early... usually around f/7.1 or f/8. I would suggest looking at the Canon RF 100-500mm f/4.5-7.1 L IS USM instead. Its significantly sharper than the old EF 100-400mm II on this specific high-density sensor. Just make sure to keep your shutter speed way higher than you think you need. People forget that at 500mm on a crop body, you are basically shooting at an 800mm equivalent. Also, check if you are using full mechanical shutter. That body is notorious for shutter shock at certain speeds. Try switching to Electronic First Curtain Shutter (EFCS) before you drop 2k on a new lens. Tbh, the Canon RF 100-400mm f/5.6-8 IS USM is a surprisingly sharp budget option if you want to stay light, but it wont survive a swamp downpour like the L-series stuff will. Stick with the L glass if you can afford it tho.
Saving this whole thread. So much good info here you guys are awesome.
