Thanks, everyone, for your input. I've decided to get a Canon 5D Mark IV. I find that the main things I am lacking in my present set of gear are very low light capability and weather resistance. I think that the 5D Mark IV best fills these wants. When I need to photograph the night sky, I will still have my 6D since I don't plan to sell it.
Canon EOS 5D Mark IV: 7fps. Canon EOS 6D Mark II: 6.5fps. The 7fps continuous shooting mode of the EOS 5D Mark IV has a slight but negligible advantage over the EOS 6D Mark II's 6.5fps rate, but its in burst depth where the two differ more from each other.
has a microphone input. Canon EOS 5D Mark III. Sony Alpha 7R. A microphone port allows connecting external high-end or specialized microphones. has a socket for a 3.5 mm audio jack. Canon EOS 5D Mark III. Sony Alpha 7R. With a standard mini jack socket, you can use the device with most headphones.
Canon EOS 6D Mark II is more versatile than Canon EOS 5D Mark III (90 a 82). The handling of Canon EOS 6D Mark II (66) is more effective than that of Canon EOS 5D Mark III (56). But, as you may know, the technical performance is meaningless if applied to the wrong context. has continuous autofocus when recording movies. Canon EOS 6D Mark II. Nikon D810. When recording movies they stay focussed and sharp. has a microphone input. Canon EOS 6D Mark II. Nikon D810. A microphone port allows connecting external high-end or specialized microphones. has a socket for a 3.5 mm audio jack.

If they need dual card slots the 5D Mark IV is the better choice. Also the 5D Mark IV offers 4K video over 1080p video that the 6D Mark II offers. But I think OP would be better off with the 6D Mark II. -Demetrius. 40D, 5D IV, EF 16-35mm F/2.8L III, EF 24-70mm F/2.8L II, EF 28-135mm F/3.5-5.6 IS USM, EF 50 F/1.8 STM. 430EX III-RT & 600EX II-RT

This new R6 Mark II runs faster (40 vs. 30 FPS) than the R3 with tracking focus and exposure! The clumsy Nikon Z9 can go faster, but only at 11 megapixels. Worse, the Nikon Z9 only runs at 30 FPS with a lot of limitations, while the R6 Mark II runs at 40 FPS all day with no restrictions.

Canon 5D Mark IV vs 6D Mark II| Key Differences 1. Size & Weight 2. Ergonomics & Handling 3. Viewfinder & LCD 4. Autofocus and Drive 5. Image Quality 6. Video 7. Price
Why is Canon EOS 5D Mark IV better than Canon EOS 6D Mark II? 16 more focus points? 61 vs 45 16.03% more megapixels (main camera)? 30.4MP vs 26.2MP 7.69% faster shooting at highest resolution with AF as JPEG format? 7fps vs 6.5fps 6 better image quality? 91 vs 85 50% faster maximum shutter speed? 1/8000s vs 1/4000s 14.29% wider dynamic range? NCrXjZ.
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  • canon 5d mark iv vs 6d ii