speters Loc: Grangeville/Idaho

The M IV is a pretty decent camera, the 6D M II is pretty much just crap (it has the worst sensor that Canon has ever put out!)!

amfoto1 Loc: San Jose, Calif. USA

Canon 6D Mark II versus Canon 5D Mark IV....

https://cameradecision.com/compare/Canon-EOS-6D-Mark-II-vs-Canon-EOS-5D-Mark-IV

The 5DIV is the better camera in many respects. It has:
- more resolution (30MP vs 26MP)
- 1.5 stop wider dynamic range (13.6 vs 11.9)
- greater color depth (24.8 vs 24.4)
- a better AF system (61-point vs 45-point)
- better viewfinder (100% vs 98%)
- larger, higher resolution LCD (3.2", 1.6 million dot vs 3", 1 million dot)
- higher spec shutter... (1/8000 top speed vs 1/4000, 1/200 flash synch vs 1/180)
- 2 memory card slots (vs single slot)
- 4K video (vs HD video)
- better sealing for dust and weather resistance

I'm not knocking the 6DII... it's a whole lot of camera for less than half the price of the 5DIV.

The 6DII...
- costs a lot less
- weighs less and is a little smaller
- has an articulated LCD screen (5DIV's is fixed)
- slightly higher native ISO range (40000 vs 32000... both extend to 50 and 102400)

Neither full frame camera has a built in flash (which isn't a bad thing, since built in flashes really suck).

Any EF-S lenses you currently have now will not be usable and will need to be replaced.

Carefully compare lenses. Full frame lenses are necessarily bigger and heavier than their crop-only counterparts. FF lenses also generally cost more.

You might be able to get a good deal on at least one lens buying it "in kit" with the camera. The 6DII is typically bundled with either the more expensive EF 24-105mm f/4L IS USM II or the more budget oriented EF 24-105mm f/3.5-5.6 IS STM. The 5DIV can be found bundled with either the EF 24-105mm f/4L IS USM II or the EF 24-70mm f/4L IS USM.

Personally, that last lens, the Canon EF 24-70mm f/4L IS USM, would interest me the most. While it's not an f/2.8 lens, it's virtually as sharp and excellent as the EF 24-70mm f/2.8L USM II... the f/4L lens is smaller, lighter and nearly half the price. It also has image stabilization, which the f/2.8 lens lacks. And the f/4L has exceptional close-focusing ability. It's ability to focus to 0.70X magnification is roughly 3X more powerful than most zooms and that might be enough to make a separate macro lens unnecessary much of the time.

Any of the recent or current Canon 70-200mm IS lenses are excellent. There are both larger f/2.8 and approx. one third smaller f/4 that are almost half the weight. The f/2.8 lenses come with a tripod mounting ring. The f/4 lenses are designed to accommodate a tripod mounting ring, but it's sold as a separate accessory.

If you decide to get a macro lens, the Canon EF 100mm f/2.8 USM is excellent. That's the older, less expensive version... still being produced and offered alongside the more expensive EF 100mm f/2.8L IS USM. The latter is also superb... but there is VERY little difference in image quality between them. The 100L/IS uses larger filters. To be honest, it's image stabilization is a lot more effective at non-macro distances, than it is at high 1:1 magnification. But both are fine lenses and both have the option of fitting a tripod mounting ring, sold separately... they use different rings. The 100mm USM shares tripod ring "B" with the Canon EF 180mm f/3.5L USM and MT-E 65mm ultra high magnification/manual focus macro lenses. The 100L/IS uses a unique tripod ring "D". I highly recommend the tripod mounting rings. They are very helpful when shooting macro (and make IS less important).

In fact, the two Canon 100mm macro lenses are the only macro lenses around this focal length that have the option of fitting a tripod mounting ring. Otherwise, I might point you toward the Sigma 105mm f/2.8 OS HSM, which is on sale right now with a huge discount... also an excellent macro lens, but with no option of a tripod mounting ring. In all other brands I'm aware of, you have to "step up" to a 180mm or 200mm macro, to have a tripod mounting ring (and those longer macro lenses are more specialized and more challenging to shoot with). There was a Sigma 150mm macro lens at one time, but it's no longer being produced.

You might find this article and the video it links helpful, though one of the lenses discussed isn't usable on Canon cameras (the Nikkor, which surprisingly is the worst of the bunch). It also only looks at one of the Canon 100mm (the L/IS).

Besides those lenses, you mention landscape photography and personally I wouldn't be without a good wide angle. I think my Canon full frame lens of choice for this would be the EF 16-35mm f/4L IS USM.... Even more than the 24-70mm f/4 version, with an ultrawide we're usually stopping down for great depth of field anyway, so an f/4 lens is no problem at all. And it saves a lot of money, size, weight compared to a 16-35mm f/2.8. Like the 24-70mm f/4, the 16-35mm f/4L has image stabilization, while the f/2.8 version doesn't. It also uses a smaller 77mm filter, where the f/2.8 lens needs an 82mm. The image quality of the 16-35mm f/4 and 16-35mm f/2.8 III Canon lenses are pretty similar, too. (If you instead want the f/2.8, perhaps because you plan to do night photography and want the brighter viewfinder, definitely get the III... it's sharper in the corners than the earlier versions.)

All that said... Have you considered switching to a mirrorless camera? This might be a good opportunity to do so and Canon is committing a lot of effort developing their R-system. The original EOS R is 30MP like the 5DIV.... while the more budget friendly EOS RP is sort of like a mirrorless 6DII, with 26MP. There are both pluses and minuses to both mirrorless and DSLRs. Decide which is best for you. There aren't a whole lot of native RF lenses for the R-series cameras yet, but EF lenses can be used easily on them, supposedly with no loss of performance. The R-series cameras are actually less expensive than their DSLR counterparts. But the RF lenses tend to be more expensive than the most comparable EF lenses.

There's lots of info about all these lenses and both DSLR and mirrorless cameras at Bryan Carnathan's website.... https://www.the-digital-picture.com/ Bryan predominantly reviews and extensively tests, compares Canon gear. You would probably find that site very helpful. The lens reviews are in depth and they have tools allowing you to compare test shots from lenses against each other, to make your own judgments about various image quality factors.

Finally, there's also is a new R-series mirrorless camera coming soon... The Canon EOS R5 is expected to be announced later this month and there's been enough info leaked to know it's going to be a serious "game changer". We don't know for sure, but it's believed to be about 45MP. There's a lot more info online at places like the Canon Rumors website. Might be worth the wait... but only you can say if it's what you need or want. And, even after the official announcement (if it actually comes next week), there may be some months of delay until the camera is available to buy.

Hope this helps! Have fun shopping.

uhaas2009

You got enough experience to use a pro camera even someone said you aren’t a pro jet. Remember you deserve a awesome camera.....😉.....
I used way to long the low end camera this what I realized when I got my Nikon 810. Get the 5D mk 4

wds0410 Loc: Nunya

Having used the most 6DM2 for two years I am going to respectfully disagree with that. The camera and sensor are very good.

47greyfox Loc: on the edge of the Colorado front range

Luckily, for me, with a “crappy” 6d2, your trollish opinion was easily ignored.

Picture Taker Loc: Michigan Thumb

I am not challenging either side on this BUT VERRY GOOD or NOT GOOD are subjective opinions.

wds0410 Loc: Nunya

99% of the content on this site is subjective opinion.

DeanS Loc: Capital City area of North Carolina

Gross exaggeration, it is only 98.999%. 😎😎😎

philo Loc: philo, ca

I have a mark 3, mark 4 and now the R. My go to body is the R. I love the live view and the movable rear screen. I use all of my current ef lens. If you present lens are S they will work on the R, but not on the 4.

Redyogi Loc: Chatsworth, GA

Amphoto1,
Thank you for that in-depth response to my question.
It may take me a year just to digest all the information you shared but I want you to know I really appreciate it.
Regards, Bob