Sooo I had a moment to think about this a bit more and honestly, ur gonna love the 5D IV but it definitely demands some respect when it comes to the technical side... especially for long wedding days. In my experience, weight is just one part of the problem—the real stress is data redundancy and power management. First off, the budget-friendly way to handle the dual slots is to get a fast CF for ur primary and a reliable SD for backup. I've tried many over the years and honestly, the SanDisk 128GB Extreme Pro CompactFlash (usually around $90) paired with a SanDisk 128GB Extreme Pro SDXC UHS-I Card (about $25) is the most stable combo. Don't go for the super expensive UHS-II SD cards cuz the 5D IV slot can't even utilize those speeds iirc, so it's basically wasted money tho. For power, I'm always a bit cautious and recommend sticking to OEM. I'd grab two Canon LP-E6NH Lithium-Ion Battery ($79 each). They have slightly higher capacity than the older 'N' versions and won't throw communication errors mid-ceremony which would be a total nightmare lol. Since ur worried about the weight, check out the Peak Design Slide Camera Strap ($65). It’s got that seatbelt-style material that slides easily, and the quick-connectors are super secure. Plus, it's way more affordable than those fancy leather dual-harnesses. Finally, definitely grab a Vello Screen Protector Ultra for Canon EOS 5D Mark IV for like $20. It's a small price to pay to keep that rear LCD from getting scratched up by ur shirt buttons or belt buckles during a 10-hour shift. Total spend is right around $360, which stays well under ur limit!

yo, congrats on the 5D IV! It's literally a tank and definitely a beast for weddings. I've been shooting with one for a few years now and honestly, the weight is the biggest killer on those 10-hour days. Since you've got a $500 budget, you gotta be smart about where the money goes. For memory, the 5D IV has that dual slot setup which is a lifesaver. I'd compare these two routes for your backup flow: * Lexar Professional 1066x 128GB CompactFlash Card: This is usually my "main" card. It's super fast for bursts, but a bit pricier than SD. Highkey worth it for the reliability tho.
* Lexar Professional 1667x 128GB SDXC UHS-II Card: Good for the second slot. It's actually faster than the camera's bus speed (the 5D IV is only UHS-I), but it ensures zero bottlenecks when writing files. Now, about the weight - it's *huge*. Instead of a standard shoulder strap, look at these: * Spider Camera Holster SpiderPro Single Camera System v2: This takes the weight off your shoulders entirely and puts it on your hips. Pros: No back pain. Cons: Feels a bit bulky on your belt.
* HoldFast Gear MoneyMaker Solo: It's a high-quality leather sling. Pros: Looks super professional for high-end weddings. Cons: The camera can swing a bit if you're moving fast. Personally, i think the Spider Holster is the way to go for long days cuz it saves your spine. Your gonna love the dual card peace of mind tho! Are you planning on shooting any 4K video with it too or just stills?? peace

Long weddings are brutal. Weight distribution is basically everything! i'd grab the BlackRapid Sport Breathe Camera Strap ($80) and Vello BG-C14 Battery Grip for Canon EOS 5D Mark IV ($90).

My buddy told me the exact same thing last week. Guess he was right lol.

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Can vouch for this

^ This. Also, the thread covers the essentials like straps and batteries perfectly. It really sounds like weight distribution and data safety are the big winners here. I've been happy with my 5D IV for years and there are a couple things I found that really help with the portrait side of weddings. One thing that works well for me is using an L-bracket. I use the SmallRig L-Bracket for Canon 5D Mark III IV 2202 and it’s a total game changer when you're shooting portraits on a tripod. It keeps the camera's weight centered so your tripod head doesn't slip. No complaints about the build quality either. Also, think about the DIY maintenance side. A Giottos Rocket Air Blaster Large is a must-have for cleaning the sensor area after lens swaps in messy environments. Keeps things running smooth without needing professional service constantly. Lastly, if you're dumping huge files, I'm satisfied with the Lexar Professional Multi-Card 3-in-1 USB 3.1 Reader for getting everything onto the PC fast. It saves a lot of time after a 10-hour day.

Just catching up on the thread and there are some solid suggestions here already. Everyone is spot on about the weight—that 5D IV starts feeling like a brick after hour six of a wedding. One thing I havent seen mentioned much is lighting and the newer battery tech. Since you have $500, I’d suggest looking at the Canon LP-E6NH Lithium-Ion Battery instead of the older N versions. They have a bit more capacity and work perfectly in the Mark IV. Also, for weddings, if you dont have a reliable speedlite yet, the Godox V1-C Flash for Canon is a total game changer compared to the older AA-battery flashes. It uses a lithium battery so it recycles way faster, which is huge when the couple is walking down the aisle. You could grab the flash and a couple of those newer batteries and still stay way under your budget. tbh I used to use the Vello grip but eventually swapped to the official Canon BG-E20 Battery Grip. If you can find a deal on a used one, the build quality and weather sealing are much better for those rainy outdoor ceremonies.

> I'm already eyeing some extra LP-E6N batteries and a fast CF card for that second slot, but I'm curious about things like battery grips or specific strap systems... Its unfortunately common to see people rush into buying accessories that dont actually improve the 5D IV experience. I had issues with cheap battery grips where the dials felt mushy and slowed down my workflow during ceremonies. They are simply not as good as expected for professional use, honestly. For a $500 budget, you need to be methodical. If you want a fast CF card without the ridiculous price tag of some brands, look at the Transcend 128GB 800x CompactFlash Card. It handles the 5D IV buffer just fine for wedding bursts and saves you a chunk of change. Regarding the screen, the glass is surprisingly prone to micro-scratches during 10-hour days. I highly recommend the Expert Shield Glass Screen Protector for Canon 5D Mark IV. Most film protectors are disappointing and bubble up too easily under heat. To manage the weight without adding the bulk of a grip, i suggest the Peak Design Cuff Camera Wrist Strap. It allows you to let the camera hang securely when you're adjusting lights or posing couples. Also, pick up a Godox XPro-C TTL Wireless Flash Trigger. Having a reliable, dedicated transmitter is essential for wedding reception lighting and it fits perfectly into your remaining budget.