Really Right Stuff LCF-54 replacement foot for Canon 100-400mm f/4.5-5.6L IS II

Really Right Stuff LCF-54 replacement foot for Canon 100-400mm f/4.5-5.6L IS II, precise replacement instead of compromise

Sometimes it’s surprising how much difference a seemingly small part can make. The Really Right Stuff LCF-54 replaces the original tripod foot of your Canon EF 100-400mm f/4.5-5.6L IS II and delivers exactly what many telephoto shooters want in everyday use: more stability, more control, and less fiddling with the tripod plate. The foot is mounted directly in place of the original foot and sits snugly and twist-proof on the lens so you can focus on composition instead of wobbly hardware.

The LCF-54 is designed specifically for this lens, so it fits the Canon EF 100-400mm f/4.5-5.6L IS II exactly and makes optimal use of its geometry. No universal part, no “it’ll probably work somehow,” but a precisely fitting solution with anti-twist protection and a stop that makes handling the zoom in the studio, in the stadium, or out in the field noticeably more pleasant.

Made in the USA, solid construction from 6061-T6 aluminum

The replacement foot is milled in the USA from high-quality 6061-T6 aluminum, a material that is practically standard in aerospace engineering. You notice it immediately: the LCF-54 feels light but by no means delicate. Weighing only 76 g, your setup remains mobile, while the foot still gives you that reassuring feeling of “this will hold,” even on a fully extended 400 mm telephoto.

The surface is black anodized Type II, which not only looks sleek and unobtrusive but also reliably protects the foot from wear and corrosion. Especially if you’re outdoors a lot—rain, dust, salty coastal air—this robust finish really pays off. The edges are cleanly deburred, nothing sharp, nothing rattling, everything feels like it’s made from a single piece.

Specifically for this lens, precision fit for Canon EF 100-400mm f/4.5-5.6L IS II

The LCF-54 is not just “for Canon EF telezooms,” but truly developed specifically for this lens: the Canon EF 100-400mm f/4.5-5.6L IS II. The length of about 10.2 cm and the height of 3.8 cm are tuned so that you can carry the lens safely, balance it cleanly, and quickly align it on the tripod without constantly having to fiddle with various screws.

Thanks to the integrated anti-twist protection and the stop, the foot reliably stays in position even with frequent repositioning. In practice this means: less readjustment, less risk that something comes loose unnoticed during a hectic pan. The existing strap eyelet further expands your options if you prefer a classic strap attachment or want to double-secure your setup.

Arca-style compatible, integrated clamp profile for 38 mm quick-release clamps

The Really Right Stuff LCF-54 features an integrated Arca-style compatible dovetail profile that, according to the manufacturer, fits exactly into 38 mm quick-release clamps. You no longer need to screw an additional quick-release plate under the foot. Simply insert it into your suitable ARCA compatible clamp, tighten, done.

On the underside you also have a 3/8" UNC photo thread and a 1/4" UNC photo thread available. This allows you to mount the foot directly on a tripod head or another support if needed. The width of about 4.3 cm provides a stable contact surface without making your setup unnecessarily bulky. Anyone who frequently switches between tripod, gimbal, and monopod will appreciate this flexibility.

With QD strap anchor mount, fast and secure carrying option integrated

The LCF-54 has a QD strap mount, i.e. an integrated mount for a quick-detach strap anchor. That may sound technical at first, but it’s very practical in everyday use: you can snap in a suitable strap with QD strap anchors, carry your lens and camera comfortably, and release the strap again with one hand when needed. To use this mount you need a strap with QD strap anchors, which you can find here, for example: Strap with QD strap anchors.

Especially during longer sessions—sports, wildlife, reportage—this solution noticeably relieves you. You don’t have to hold the telephoto on the camera all the time; instead, you can use it like a compact carrying handle. The combination of the QD-compatible mount, strap eyelet, and the solid grip feel of the aluminum foot makes the LCF-54 a true workhorse in the field that can quickly adapt to your preferred carrying and securing method.

Safety features and R-Lock, more margin when things get hectic

So that your lens doesn’t accidentally slip out of the quick-release clamp, the LCF-54 is equipped with two safety stop screws. These safety stop screws prevent unintentional slipping out of the quick-release clamp, even if the clamp is not completely closed or you tilt the setup a bit too steeply. Especially with expensive telephoto lenses, this small detail is a very reassuring factor.

In addition, the Really Right Stuff R-Lock mechanism is used, which ensures defined, repeatable positioning in suitable clamps. In combination with the ARCA-compatible profile, this results in a stable, play-free connection that holds reliably even during fast pans and continuous shooting. In short: you can rely on the mechanics and spend less time thinking about the hardware.