Is this $70,000 LENS worth it?

Since it was released in 2014, the Canon CN20 50-1000mm has been used on almost every high end wildlife documentary. It's 20x zoom and servo control combined with its relatively light weight have meant is has become the go to lens for natural history documentary. But it's not cheap! At just under $70K its an incredibly expensive lens.

I bought myself a Sigma 60-600mm lens as it has a 10x zoom, and so provides a nice range for filming wildlife at a fraction of the cost.

In this video I make a comparison of the 2 lenses and try to explain why the CN20 costs 35x more!

Here's links to my kit (Amazon associate links)

Vlog Camera
DJI Oslo Pocket 3 Creator Combo - https://amzn.to/4dHmKxQ

Wildlife Camera
FX6 - https://amzn.to/3y8UUf4
Tilta FX6 Cage - https://amzn.to/4c1x82i
Tilta Dovetail - https://amzn.to/4d64bn6
Sigma 60-600mm Canon EF mount - https://amzn.to/4bWuAT5
Sigma 60-600mm E mount (Sony) - https://amzn.to/4da9Zf4
CF Express A card - https://amzn.to/3Wlk3ez

Editing
MacBook Pro M1 Max - https://amzn.to/4fM5cmq

Rigfoot - https://fullframecamera.co/rigfoot/
EVF Support - https://fullframecamera.co/flop-stop/

0:00 Intro
1:19 Price
1:44 Size
2:30 Aperture
4:40 Image Quality
5:35 Focus
8:05 Servo
10:16 Zoom
11:20 Conclusion