At times I needed to be mobile with two cameras at hand and instant swapping between the two. Two cameras on a single twin shoulder strap is fine if stationary but not when moving around. To solve this, I decided to have the primary camera in hand attached to a shoulder strap while the secondary on a clip attached to the belt. I have read some articles, promotion and advertisements about those clips but decided to build one since I have the components needed.
It consists of a belt, an old Taiwanese made quick release, a camera bag partitioner and a quarter-inch flat head screw with flip handle. The quarter-inch screw of the quick release only have a slot for tightening it to the camera, I swapped it with the quarter-inch screw with the flip handle. A hole is punched through the partitioner and the belt, then the original quarter-inch screw of the quick release made to hold the whole components together.
I have used it and surely it beats having two cameras on a single twin shoulder strap. The camera with the primary lens (150-600mm) attached to a single shoulder strap was held in hand and another camera fixed with a secondary lens (24-105mm) was at hip level, and it was a joy to walk around. I felt that I could even run with less hassle. Attaching the cameras with zoom lenses will cover a wide range of focal length which is good for covering event besides walking around looking for wildlife and at nature.
Note: This is a new belt hence this article. The original clip made with an old worn out belt. The rest are the same.