I had cataract surgery done a year ago using a new type of lens call Restor which allows both far and near sight. It's a bit more expensive but well worth it.

Dexter; I would recommend the Sigma 150-600 mm. You can get the Sport model, (they should really call it the "Professional" model") for around $2000 or get the Contemporary model for $1000. The difference between the two is the Sport model has a more robust build, but they both use the same lens. I have been using the Sigma for wildlife and sports for quite awhile and find it tack sharp at a very reasonable price. I use it on a crop body so the zoom is even greater than 600mm. Actually it's 960 mm when fully extended. The lens does great on a tripod but also does great handheld. I you would like to see a good review of the lens go to https://www.youtube.com/watch?v=F6tCUFXiDws

I hope you find what you are looking for.

I often use a Benro high quality monopod combined with a Canon body and a 150-600mm lens when wildlife shooting. In many places the ground is just too uneven for a tripod. Because you may be in the same place for hours waiting for the shot the monopod not only steadies the shot but helps with the weight of the heavy glass. Also it's quicker than handheld since the camera is already in "position" instead of swinging it up from your hip when the elusive animal or bird decides to show itself. Also, the monopod makes a good walking stick in rough terrain.

Princeducan. I would go with a Canon T6i starting with a kit lens. You can get one for under $1000 and have lots of room for growth. Not only does it take great photos but also does an outstanding job with video.

If you would like to see a couple of videos done with a Canon 750D that I've done go to the following links

https://www.youtube.com/watch?v=18FU1JEzMD4
https://www.youtube.com/watch?v=EX6v80ljuLc

I have used dslr video both commercially and for pleasure and find it exceptional. The thing to realize is that there is a learning curve to using dslr for video work. The nice thing about using dslr for video is the many lenses available and the depth of field that you can get.