Benro FH100M3 filter holder kit

Polariser

The polariser snaps into place magnetically and can be rotated from behind the camera using either a drive belt top left, or a knurled ring at the lower right.

Geared adjustment

Rotating this knob precisely adjusts the position of graduated filters. It clicks into four positions, one for each filter slot plus neutral, and has a push-button lock.

Mounting clip

This sprung, sliding red tab is used for clipping the filter holder onto the lens adapter ring. Rotating the small blue knob locks it into place.

Back in 2018 I reviewed Benro’s FH100M2 filter holder, which boasts a number of innovative features in a bid to improve the experience of using square filters. Firstly, it uses plastic frames for the filters, which minimises light leaks, provides protection against accidental drops, and helps to keep them clean. Secondly, a geared mechanism built into the