Modular replacement lens foot OF-C-T 100 for Canon EF & RF & Sony FE telephoto lenses OP-100 (100 mm) 2 x QD

Modular replacement lens foot OF-C-T 100 for maximum control on telephoto lenses

When you work with long focal lengths such as a Canon EF 400mm f/2.8 L IS III, Canon EF 600mm f/4 L IS III USM, Sony 400mm f/2.8 GM OSS FE [SEL400F28GM] or Sony 600mm f/4 GM OSS FE [SEL600F40GM], you know the problem: tiny shifts in the center of gravity and the whole setup suddenly feels nervous and unstable. This is exactly where the modular replacement lens foot OF-C-T 100 comes in. It replaces the original foot of your telephoto lens and makes your Canon EF, Canon RF or Sony FE telephoto lenses sit much more calmly, precisely and reliably on the tripod head.

The OF-C-T 100 is specially developed for modern super-telephoto optics, including the Canon RF 400mm f/2.8L IS USM (2021), Canon RF 600mm f/4L IS USM (2021), Canon RF 800mm f/5.6L IS USM (2022), Canon RF 1200mm f/8L IS USM (2022) and Canon RF 100-300mm f/2.8 L IS USM (2023). This means you don’t have to wonder whether it will really fit, and can instead focus directly on what matters: clean, sharp images.

Compatible with many lenses, one replacement foot for several telephoto giants

The OF-C-T 100 is deliberately designed to work with a whole range of Canon EF, Canon RF and Sony FE telephoto lenses and not just a single model. For you this means: you can use the same modular replacement lens foot on several telephotos, for example on a Canon RF 400mm f/2.8L IS USM and later on a Canon RF 800mm f/5.6L IS USM, without having to invest in a completely new solution each time.

Especially when you switch between a Canon EF 600mm f/4 L IS III USM and a Sony 400mm f/2.8 GM OSS FE [SEL400F28GM], you benefit from this flexible concept. The lens base OS-C-T for Canon EF/RF and Sony FE telephoto lenses is designed to reliably cover the different body shapes and mounting points of these professional optics. So you get a system that proves itself in real-world use instead of a rigid single-purpose solution that only looks good on paper.

Best materials and manufacturing quality for lasting precision

With the OF-C-T 100 we rely on robust, precisely manufactured components made of high-quality metal that will neither wear out nor start rattling even after years of heavy use. The surface is durable and designed for the rough everyday life of photography, whether on the sidelines, in the forest or somewhere between airport fence and coastline. We place great value on tight tolerances so that the replacement foot sits on the lens without play and the connection to the quick-release clamp remains reliably secure.

The precise machining of the 100 mm base plate and the mounted base creates a very rigid unit that reduces vibrations and improves the stability of your entire setup. This is particularly noticeable when you are working at the limits of long focal lengths, such as 600 mm or 800 mm, where every small vibration becomes visible in the viewfinder. This way you can truly get the actual sharpness performance out of your telephoto lenses.

QD-compatible with 2 strap anchor sockets for double security

The OF-C-T 100 features two QD-compatible strap anchor sockets that provide you with an especially secure carrying and safety solution for your camera-lens combination. Thanks to the two QD strap sockets you can either attach one strap at two points or use two separate straps to further protect your setup against slipping or unwanted tilting. Especially with heavy combinations such as a Canon RF 1200mm f/8L IS USM or a Sony 600mm f/4 GM OSS FE [SEL600F40GM], this double safeguard is a real advantage.

To use the QD strap sockets, you need a suitable strap with QD strap anchors. Without these special QD strap anchors, the sockets cannot be used in a meaningful way, as they are designed precisely for this system and thus ensure defined engagement and secure release. In this way, handling remains comfortable while the connection to your equipment stays reliable and resilient.

ARCA-compatible for seamless use in quick-release systems

The 100 mm base plate of the OF-C-T 100 is ARCA-compatible and therefore integrates directly into common Arca-style quick-release systems. You can clamp the replacement foot into a suitable ARCA quick-release clamp without additional adapters and benefit from a secure, form-fitting seat. This makes switching between tripod, gimbal and other mounts much smoother and saves you valuable time on location.

Thanks to the ARCA-compatible dovetail geometry along the entire length of the plate, the center of gravity can be adjusted very finely on the tripod head. In combination with the movable base, you achieve a very well-balanced setup of your lens-camera combination, whether you are working with a teleconverter or switching between a camera with battery grip and a more compact body.

Developed by us, practical design based on real-world experience

The modular concept of base and plate was developed by us because classic one-piece replacement feet are simply not flexible enough in many situations. In practice, the balance of a setup is constantly changing, for example when you switch from a Canon RF camera with battery grip to a lighter body without grip or when you insert a teleconverter. A rigid foot cannot respond to this, a modular one can.

We deliberately opted for a movable base on the 100 mm plate to give you this freedom. This allows you to adjust the position of the lens above the dovetail plate with precision. The result is smoother handling on the tripod head and noticeably better control when tracking moving subjects, for example in sports, wildlife photography or dynamic events.

All screws and tools required for mounting are included

The OF-C-T 100 comes complete with everything you need to mount it on your telephoto lens. Included are the lens base OS-C-T for Canon EF/RF and Sony FE telephoto lenses, the matching 100 mm quick-release plate OP-100, M4 mounting screws in various lengths as well as M3 safety stop screws for the underside of the plate. This means you don’t have to search for special screws or improvise, but can mount the replacement foot directly on your lens.

The M4 mounting screws ensure a stable, play-free connection between lens and base. The M3 safety stop screws prevent the plate from accidentally sliding out of the quick-release clamp if the clamping should loosen or if you unconsciously push the camera a bit too far backwards or forwards. This significantly increases everyday safety, especially with heavy glass and longer distances between car, location and tripod.

Movable base for optimal center-of-gravity adjustment

One of the most important features of the OF-C-T 100 is the base on the plate, which is movable and can be positioned along the entire length of the 100 mm plate. This allows you to fine-tune the center of gravity of your lens-camera combination very precisely. Whether you are working with a heavy camera with battery grip, a lighter camera without grip or with additional components such as a teleconverter, the replacement foot can always be adjusted so that the setup is as neutrally balanced as possible on the tripod head.

This flexible center-of-gravity adjustment really pays off with long focal lengths such as 600 mm, 800 mm or 1200 mm, where even small imbalances can lead to unpleasant tilting or sagging. With the modular design, you can choose the position of the lens above the dovetail plate so that the combination stands steady and moves evenly. This makes longer sessions much more relaxed and helps you achieve reproducible results even with changing configurations.

Thought-out details for professional use

In addition to major features such as ARCA compatibility, QD-compatible strap sockets and a movable base, the OF-C-T 100 also convinces in the finer details. The edges are shaped so that they feel comfortable in the hand when you carry the lens by the foot. The length of 100 mm provides enough contact surface in the quick-release clamp without being unnecessarily bulky or getting in the way during transport.

The combination of the lens base OS-C-T, OP-100 quick-release plate, M4 mounting screws and M3 safety stop screws results in a coherent system that is specially designed for use on high-quality telephoto lenses with Canon EF, Canon RF and Sony FE mount. This way, you not only get a replacement for the original foot, but a functional upgrade for your entire telephoto setup that gives you real advantages in everyday use.