Reviews

This bracket is well made - black-anodized cast aluminum with a nice slightly pebble-grain surface. It fits the Canon EF 100mm f/2.8L is USM Macro lens well by means of a thin rubber lining - the whole ring clam-shelling around the lens and latching via a spring-loaded lock knob, which is then secured by a couple of turns . Compared to Canon's $150 offering (https://www.amazon.com/dp/B00009R6WF/), which I have not used, it is a bargain.

What is the inside diameter?

The product heading says for canon ef 100mm f/2.8l is usm macro, but then states can’t be used with canon macro lens ef 100mm f/2.8 usm?

Can someone please measure the width of the lens collar? I see the inner diameter is 69-70mm, I'm intended to use it with a different lens. Thanks.

Fits perfectly, sturdy.

It fit perfect.no problem

Works great on sigma lens.

The collar is a perfect fit for the Canon variant of the Sigma 100-400 lens. Build quality is very nice. The package arrived a little earlier than expected.

Good solid ring mount. It does the job. Why pay more?

A perfect fit for my Canon 100mm L macro lens. I wish I could give this tripod mount ring 10 stars, I am more than happy with this purchase.

Fits the lens perfectly, for the money better buy than the OEM lens collar.

Fits the lens perfectly, for the money better buy than the OEM lens collar. Can't see paying for Canons name on a product when you can get such aftermarket product as this.