05/04/2026 5:30 am
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So I finally made the jump from my old 7D Mark II to the R7 a few months ago because everyone kept raving about the autofocus and the resolution but honestly I am kind of freaking out right now. I have been shooting wildlife for like ten years so I am not a total newbie but this sensor is driving me crazy... it is so dense that all my old EF glass looks soft or something? I am using the EF 100-400mm L II with the adapter and I thought it would be amazing but I am getting these weird results where the eye AF says it is locked on but the fine detail just isnt there when I crop in even a little bit. I dont know if it is shutter shock or if I just need native RF glass to keep up with the 32.5 megapixels on a crop frame. It is so frustrating because I know the camera is capable of more but I feel like I am fighting it.
I have a big trip to the Everglades coming up in early April—so like three weeks away—and I really need to get this sorted before I go because I cannot come back with thousands of blurry egret photos. I was looking at the RF 200-800mm because the reach sounds incredible for birds but I have heard it is a bit slow at f/9 and I worry about the diffraction or whatever at those apertures on this specific body. Then there is the RF 100-500mm which is way more expensive but maybe sharper? My budget is capping out at around $2,000 to $2,500 if I stretch it but I would prefer to stay under two grand if I am being honest since I just spent a lot on the body and extra batteries.
Has anyone else struggled with this transition on the R7?
- Should I stick with the EF 100-400 II and just accept it?
- Is the RF 200-800 worth the wait even if it is hard to find in stock?
- Or is there some dark horse lens like the Sigma 150-600 that actually works with the R7 autofocus without the pulsing issue everyone talks about?
I am just really anxious that I am gonna waste this trip and keep second-guessing my gear the whole time...
3 Answers
12
05/04/2026 5:55 am
RF 200-800 worth the wait? Definitely, but the Canon RF 100-500mm f/4.5-7.1 L IS USM is sharper if you can stretch.
- better AF
- native glass Avoid Sigma pulsing tho.
11
05/04/2026 5:31 am
Honestly, that R7 sensor is a total pixel density nightmare if your technique isnt perfect. I would suggest you double-check your shutter mode because the mechanical shutter on that body is notorious for shutter shock which makes everything look soft. You might want to consider switching to full electronic shutter for birds. If you really want new glass for the Everglades, here are my thoughts for staying within budget:
- Avoid the Sigma on the R7; the AF pulsing issue is real and it will definitely ruin your trip.
- A refurbished Canon RF 100-500mm f/4.5-7.1 L IS USM is your best bet if you can find a deal near $2,300.
- The Canon RF 100-400mm f/5.6-8 IS USM is surprisingly sharp and keeps you way under your $2,000 limit. Just be careful with the Canon RF 200-800mm f/6.3-9 IS USM because f/9 hits diffraction territory quickly on a crop sensor. Native RF glass is basically the only way to go here.
4
05/04/2026 6:15 am
^ This. Also, i totally feel your pain about the gear anxiety because I was in the exact same boat last year before my big trip! I was freaking out about my shots being soft on the Canon EOS R7 too... like, literally losing sleep over it. I spent weeks pixel peeping and honestly almost returned my whole setup because I thought my glass was just bad. But then I realized I was just trying to shoot way too fast and my technique was super sloppy since I was relying way too much on the fancy AF to save me. I ended up just slowing down and practicing my stance and suddenly everything looked amazing again! It is a massive learning curve with that high res sensor tho, but so rewarding when it finally clicks. Are you planning on doing mostly handheld shooting or are you bringing a tripod? Also, what kind of lighting do you usually find yourself in? If you are shooting in deep shade it might change how you feel about the aperture!
