rmorrison1116 Loc: Near Valley Forge, Pennsylvania

I have the Sigma 150-600 Contemporary in Nikon and the Sport in Canon. I have the materials 1.4 TC for the Sport and a Sigma 2X for Nikon.

With the 2X TC you lose AF but depending on the subject, images are still pretty good, a little softer but still good.

The Sport with the 1.4 TC and an EOS 5DSr hanging off the small end can give you amazing images, depending on the subject.

I use the C version on my D7200, a nice combo, very lite for a big lens, easy to hand hold.

The S version is usually on my 7D II. Much heavier than the Nikon setup but can still be hand held. When I put the S on the 5DSr, I usually use a tripod although not always.

It's a nice lens and for around $900 the C is a great buy. If you shoot in less than ideal environments, dust, salt air, sand, crap like that, spend the extra, about double, money and get the S model. It's built to withstand some nasty crap.

Haydon

16-35 2.8L II, 24-70 2.8L II & 70-200 2.8L II

Bill_de Loc: US

My full frame is a D4s. The 17-35 doesn't have any issues with screws coming loose. I've probably had it for more than 15 years. I think it is still in the Nikon lineup.

If they are coming out with a newer version of what you want, you owe it to yourself to wait so you can compare the choices. Then make your decision. Good luck.

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jerryc41 Loc: Catskill Mts of NY

I think I'm at that point now. If I could keep only three, I might choose my Nikon 80-200mm (older version of the 70-200mm), 28-300mm, and Tokina 16-29mm.

jsimp3 Loc: Tennessee

I have used it with a TC... but I would suggest changing switching to "DX" mode if you're shooting with a full-frame.

MikeMck Loc: Southern Maryland on the Bay

These would be my choice also. I would get the 24-105F4.0L IS.

LFingar Loc: Claverack, NY

If you have learned to use the 7DII then the 5DIV should be no problem.
The 16-35 f/4 L does have IS, as do the other two lenses I listed. If you do go with a 6D or possibly even the 5DIV you will find that the f/4 version will fulfill most all of your needs, as well as being lighter, less expensive, and with slightly better IQ.
Unless you really want to spend the money for a 5DIV I still think the 6D is your best bet for FF. The 7DII you already have will do everything the 6D can't, and then some. There are also some good EF-S lenses that will work with the 7DII but not with a FF, which makes them a questionable expense. The 18-135 is one that often gets praised. Just the same, lenses will outlast bodies by a good bit usually. If you can afford it, then, IMO, always go for the best quality. In the Canon line that would be the L's.
I see that some have mentioned the EF 70-200 f/2.8 L II. I have that lens, and it is excellent, but since buying the 100-400 L II I find that I have much less use for it. It comes in handy for indoor sports with my 7DII, but otherwise, with the 6D's high ISO performance and the improved IS of the newer lenses I don't find much use for it. Plus, the IQ of the two lenses is quite comparable and the 100-400 will focus closer.

Mary Kate Loc: NYC

sr71 Loc: In Col. Juan Seguin Land

kit lens

markngolf Loc: Bridgewater, NJ

I have the 7D MII & 5D MIII. I have the Canon 24 - 70 mm f/2.8 II, Canon 70 - 200 f/2.8 II, Canon 50 mm f/1.4, Canon Telextender 2x III. There are not many photo opportunities I miss with these combinations. If I did more long range shooting with low light, I'd probably opt for the Canon 100 - 400 f/4 II. Call B & H - maybe they'll offer you a discount if you buy all lenses together. Another trustworthy merchant is http://www.profeel.com. I know they will offer best prices - call them and speak with Ester. B & H, Adorama, Cameta & Profeel are authorized Canon dealers.

Mark

jeryh Loc: Oxfordshire UK

Canon 5D3, Canon 300mm F2.8L, 16-35mm F2.8L 11 35mm F1.4L. Covers moat things I photograph

Carl D Loc: Albemarle, NC.

24-70mm walk around
90mm macro/portrait
70-200mm general telephoto

wj cody Loc: springfield illinois

i use nikon f6 af body.
for that camera, the 17-35mm f2.8, the 105mm f2dc and the 135mm f2dc.
for my leicas (m4 and m6) the 35mm f2 asph summicron and the 50mm f1.4 summilux
for my hasselblad 201f the 50mm f2.8, the 80mm f2.8, the 250mm f4 and the 500mm apo
for my 5x7 ica tropical field camera, the 210mm f5.6 nikkor, don't currently use anything else on it, as it is a good general lens

mas24 Loc: Southern CA

Good choices. The 24-70mm would be the very first choice for me.

shutterbob Loc: Tucson

Only 3? That's a tough one, but my choices for your subject matter would be a 24-70 f2.8, a 70-200 f2.8 ($2,000 limit might be pressed a little here, but this focal length is so useful). The third lens would be a hard choice. Either a 16-35, a fast 50mm, or something like Sigma's 150-600 sport, which conveniently falls just under that price limit. I think you will find that to adequately cover your chosen subject matter, you will "need" all of these........and there will always be that "want" for more.