sooo, i feel u on that transition lol. i moved to the r6 ii last year and thought i needed to buy every official canon accessory to keep it "safe." honestly? i was pretty disappointed. i dropped like $80 on a second Canon LP-E6NH Lithium-Ion Battery and it actually started acting up after only three months... wouldnt hold a full charge. unfortunately, canon support was a nightmare to deal with so i basically wasted that cash. for your $400 budget, you gotta be smart cuz gear adds up fast. Here is what i actually recommend from my own trial and error: - **SD Cards:** dont waste money on V90 cards unless youre doing heavy 4k video. i use the Lexar Professional 1667x 128GB SDXC UHS-II which is usually around $40 for a 128GB. way cheaper than the "pro" stuff and handles the r6 ii burst rate just fine without lagging.
- **Power:** since the official ones are overpriced and sometimes flaky, maybe try the SmallRig LP-E6NH USB-C Rechargeable Camera Battery. it's like $40 and you can charge it with a phone cable, which is literally a lifesaver when you forget your charger at home.
- **Glass:** since you have $400, seriously check out the Canon RF 50mm f/1.8 STM. it’s usually like $170 and way lighter than using adapted EF glass for everyday walk-around shots. so yeah, avoid the "official" trap where you can. i mean, the camera is great but spending your whole budget on just a battery and one card is a ripoff imo. stick to the v60 cards and third party power and you'll have money left for more fun stuff. gl with the new rig!! peace

In my experience, moving from a DSLR to the R6 Mark II was a bit of a learning curve, mostly because the technical demands of the RF system are just way higher. I initially thought my old SD cards would be fine, but honestly, I ran into a massive bottleneck almost immediately. When you’re pushing those high frame rates—literally 40fps—the buffer just chokes if you aren't using a high-speed card. I ended up getting a couple of those V60 rated cards because V90 felt like overkill for my budget, but yeah, it's something you gotta consider if you dont want the camera locking up while it writes data. Another thing I learned the hard way was about power. These mirrorless bodies are basically mini-computers and they eat through juice way faster than the old DSLRs. But instead of buying a ton of expensive spare batteries, I looked into the USB-C Power Delivery specs. I found that a decent PD-compatible power bank actually keeps the internal battery topped off while I'm shooting, which was a total game changer for long days. Just make sure the output is high enough... I think it needs to be a specific wattage to actually charge while the camera is powered on, maybe 30W or more? Lastly, keep an eye on your sensor. Since there's no mirror in the way, that thing is exposed every time you swap lenses. I was super paranoid at first and ended up getting a proper sensor cleaning kit and a high-quality blower. It sounds basic, but keeping dust off the glass is highkey the most important "accessory" for the RF system if you're switching lenses in the field. But yeah, $400 should definitely cover a solid card, a power bank, and some cleaning gear with room to spare! good luck with the new kit!!

Congrats on the upgrade!!! The R6 II is basically a beast, but it definitely feels a bit more fragile than the old chunky DSLRs lol. I’m a bit of a stickler for reliability because I hate the idea of gear failing mid-shoot. Before I drop a full list, what kind of stuff are you actually planning to shoot?? Like, are you going to be out in the elements doing wildlife, or is this more for family and portraits? That $400 goes a lot further depending on what you're up against!! Anyway, here are two quick things I swear by for peace of mind: 1. Expert Shield Glass Screen Protector - Seriously, get this on the flip screen immediately. Those screens are pricey to replace and they get smudged or scratched so easily tbh.
2. Peak Design Cuff Camera Wrist Strap - I'm always paranoid about dropping my rig when I’m swapping lenses with that EF-RF adapter. This keeps it tethered to your arm so even if it slips, it’s not hitting the pavement!! Hope that helps a bit!