PU-150 150mm Lengthened Universal Quick Release QR Plate Telephoto Lens Plate for Tripod Head Ballhead DSLR Camera, Arca-Swiss Compatible

A lot of cameras are unbalanced when mounted on a tripod with large a lens. This dove tail plate allows you to adjust the center point of mass for best balance. This allow putting less of a strain on the adjustable head on your tripod. It allows for easier pointing without having to tighten your mount's clutches.

I purchased this to extend the mounting point of a peak design toggle on my Canon 200-800 lens. I want a more balance load to carry around. I used a thread adapter to make it work also.

The collar ring on my ttartisan 500mm has an arca plate but it’s slightly narrower, so it does slide off the base. Got this one and the two screws fit the holes on the collar ring’s base perfectly. Super tight and nice.

High quality and well made. Great for holding 2 devices (ie, dual GoPros) on top of a tripod

Very well made and exactly what I needed. Not to mention the company's outstanding speed of shipping and handling .