Low Budget Dave wrote:
I am still not sure what people are doing with all these 1200 mm (equiv.) lenses on the market.
It is basically a small telescope. Even if you are shooting a relatively slow moving object, like the moon, it is hard to get enough stability to be useful.
If you are trying your hand at sports photography from the cheap seats, for example, the movement of the stadium is usually enough to blur your pictures.
You would be surprised at the VR capabilities on these suckers. I owned a Sony that went out to 1200 mm and I could hand hold with sharp images using it a 1200. Now, professionally, I use my Nikon D850 with the Nikon 500 5.6 lens.
But, like I stated, the images I got from my little Sony 1200mm lens were quite useful, surprisingly.