I just got this lens, I have taken some nature shoots, sport shoots, and portrait, all have exceeded my expectations! I am still learning this lens and the 6DMarkII I just bought but if you are indoubt go for it this is a huge step up : 0 ) A big plus in even higher ISO's the resolution is very sharp.
I have used the non-stabilized 70-200 f4 lens for several years. It is an excellent lens for certain. Given that my mind’s eye prefers telephoto photographs over wide angle shots, this older 70-200 spent a lot of time mounted to my camera. The lack of IS was not too hindering for my photography outside, although I did realize limitations from time to time. When shooting indoors, I found the lens less than ideal.
In the summer of 2018 I decided to buy a new lens that would allow me to have the telephoto view I prefer, with better indoor performance. I looked at all the Canon L lenses in the telephoto zoom range. When I visited my camera store I held all the models mounted to my 7D. While the online reviews all talk about weight as an issue to consider, I never gave it too much thought. However, this visit to the store was an eye opener. I walked in planning to get the f2.8 IS version. But holding the lens and camera at the counter, the only impression I had was the significant mass the faster lenses. Given that they felt heavy inside at the camera counter, how would these lenses be when walking in the woods or at an all-day event? At that point I decided to go for this lens instead. It was a good decision!
I have owned the lens for about seven months now. I use this lens indoors much more than I ever used my non-stabilized version. The image stabilization is truly fantastic! Additionally, I do see an enhancement in the image quality as well. But the real beauty of this lens comes through when traveling or shooting out of doors. My first outing with the lens ended up being an “unexpected” five-mile hike on a nature trail. While enjoying photographing along the trail, I lost track of the distance I had walked into the very remove area. But it was the return walk to the trail-head that I realized I had made the right choice. Weight does matter!
The lens is always attached to my camera. It is reattached immediately after finishing using one of my other lenses. I am very happy that I chose the lighter, handier, more capable stabilization of the EFS 70-200 f4 IS II L.
I bought this lens mainly because many pros recommend this as quite possibly the best Canon lens ever produced. I'm slowly building up a pro lens collection for stock photos. I use this one for wildlife and it does a fantastic job. I put it on my Canon 77D, keep in mind that this and any other 'Rebel' line camera has a crop factor of 1.6. So the actual zoom with this lens and Canon 77D body is 112 mm to 320 mm. I wish I would have known this when I bought my camera with three lenses because my 24 mm lens for vlogs actually turns out to be a 38 mm lens, too zoomed in for my small space. I actually have to go with a 10-18 mm lens for close up vlogs, but I'm glad I have the extra zoom with the 70-200 mm, I can really get up close and personal with the wildlife photos! If I ever switched to a full frame camera I think I would miss the extra zoom.
I bought this to replace an older version and I am pretty happy with it. The lens does NOT come with a collar to mount to a tripod which is a big hassle to have to buy one separately.
I owned version 1. I used it a lot and liked it a lot. But it does have weaknesses, notably it sometimes struggles to accurately focus on small objects. I didn't plan to upgrade until Canon sent me a discount. I have used version II for 3 months and have to say it's better than expected. Every image is extremely sharp. Color and contrast look improved too. I know lab tests show little or no improved sharpness but in real life, it is noticeable. Perhaps the improved autofocus and IS are the big factors in real world shooting. I shoot mostly outdoors--landscapes, wildlife and some portraits with both a 77D and 5D IV. I have also used it indoors for some portraits in low light where the IS has produced sharp images handheld and slow shutter speeds. If you're on the fence about upgrading---go for it!