Related to AussieTrev's post -
For many years now I have used a sturdy Manfrotto 3006 "junior" monopod. The bottom of the foot is likely more Shoe-Goo than the original vinyl tip. When touring, this monopod doubles as a hiking stick.
I have a bunch of these inexpensive quick-release pairs:
Sima Quick Connect. I've paid as much as US$15 and as little as US$8 over the years.
Recently I added
this ball head between my monopod and the quick release "puck". This release is rated for 2kg (4.1 pounds). But please keep two things in mind... that weight limit is for cantilevered force, not force directly down. Second, when using a monopod, typically the photographer becomes part of the camera support.
You likely can't hang one of the huge old glass and steel lens on this combination, but I've had no issue with any of my auto-focus era lenses. But I also suspect most folks with those big camera bag rocks also shoot from tripods. I should also point out that most monopod users only use two positions with a ball head - landscape and portrait. The tilt and swivel mechanism is your wrist, forearm and elbow.