Ballhead Dilemma

I am planning on purchasing a good-quality ballhead for my tripod, but am somewhat confused on the difference between a single vs double pan type?
Can someone please elaborate on perhaps the advantages of a double pan ballhead for photo shooting. Thank you !

Best Regards,
Cyclop :^)

I believe that you could get better answers to your question if you PM moderator to move your thread to Accessories & Storage sub forum:

https://photography-on-the.net/forum/forumdis​play.php?f=34

I've never actually handled a double pan head, but I know what they are...

With a single pan head, you can pivot the entire ballhead assembly (housing, ball, & clamp) around the panning axis. That is, while you pan, the ball rotates in space, taking the camera with it.

With a double pan head, you can do that, and also, with the panning base locked, you can pivot the camera around the clamp (with the ball staying fixed in space).

I believe the advantage is that you can level the camera with the ballhead (easier than leveling the tripod), and then pan.

An alternative is to buy a leveling base. Or, like the unwashed masses, just level the tripod. I'm very happy with my single pan head (acratech).