Modular lens replacement foot OF-C-T for Canon EF & RF & Sony FE telephoto lenses with Wimberley P-40 (150 mm)

Modular replacement lens foot OF-C-T with Wimberley P-40, compatible with many lenses

To be honest, this replacement foot is something like the unsung hero of your telephoto setup. The modular replacement lens foot OF-C-T for Canon EF, Canon RF and Sony FE telephoto lenses was developed specifically for long focal lengths and is compatible with many lenses that really matter in professional everyday use. These include, among others, the Canon EF 400mm f/2.8 L IS III, the Canon EF 600mm f/4 L IS III USM, the Sony 400mm f/2.8 GM OSS FE [SEL400F28GM], the Sony 600mm f/4 GM OSS FE [SEL600F40GM], and in the Canon RF system 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 the Canon RF 100-300mm f/2.8 L IS USM (2023).

We designed the foot so that you can place your telephoto lenses on the tripod head in a stable, well-balanced way and without any fiddling. The combination of the modular OF-C-T foot and the Wimberley P-40 quick-release plate with a length of 150 mm provides a generous contact surface that confidently supports even heavy camera-lens combinations. Especially during long nature or sports photography sessions, when you’re looking through the viewfinder for minutes at a time, you’ll notice how pleasant it is when the balance is just right and nothing feels wobbly.

Made from the best materials with top manufacturing quality

For a replacement foot for lenses worth several thousand euros, there is only one direction for us: the best materials and manufacturing quality. The OF-C-T is made from high-quality, precisely machined metal that offers very high rigidity while keeping the weight moderate. We rely on a robust, cleanly anodized surface that doesn’t immediately take offense in tough outdoor use, in the stadium or simply in the studio when it comes into contact with rain, dust or a somewhat rough transport.

The mating surfaces to the lens are carefully crafted so that the foot sits firmly on the telephoto lens and feels like an integral part of it. Nothing wobbles, nothing twists, nothing feels improvised. The combination of precise milling, clean surface finishing and solid screw connections ensures that you can focus on what’s happening in front of the lens instead of what’s hanging underneath it. We’d say this is one of those components you ideally never think about because it just works.

QD-compatible with 2 strap anchor mounts for double security

If you’re out and about with large telephoto lenses, you know how uneasy it can feel when everything hangs from just a single strap. The OF-C-T replacement foot is therefore designed to be QD-compatible with 2 strap anchor mounts for double security. You can use two QD strap anchors at the same time and thus secure your lens-camera setup redundantly, for example with a shoulder strap and an additional safety strap.

To use the QD strap mounts, you need a suitable strap with QD strap anchors designed for this type of coupling. Without such strap anchors, the system cannot be used sensibly, so it’s worth taking a look at suitable straps with QD anchors that are designed for heavy telephoto lenses. This creates a carrying system that feels significantly safer in the field, in the stadium or when traveling, and gives you a good deal of peace of mind when you’re out with expensive equipment.

ARCA-compatible for seamless integration into your quick-release system

The OF-C-T with Wimberley P-40 is fully ARCA-compatible, so you can clamp it directly into common ARCA quick-release couplings and clamps. The integrated dovetail geometry of the Wimberley P-40 quick-release plate with a length of 150 mm ensures that you no longer need an additional adapter plate. You simply place the foot in your ARCA clamp, tighten it, and the setup is secure.

Especially if you already use several ARCA-compatible components, the OF-C-T replacement foot integrates seamlessly into your existing system. Whether gimbal head, ball head with ARCA clamp or panoramic rotator, you can quickly move your telephoto lens without having to re-mount it each time. This saves time, reduces potential sources of error and makes your entire setup noticeably more flexible.

All screws and tools required for mounting are included

We know how annoying it is when a new accessory first sends you searching for the toolbox or when the right screws are missing. That’s why all screws and tools required for mounting are included.

The set includes the lens base OS-C-T for Canon EF/RF and Sony FE telephoto lenses, the matching Wimberley P-40 quick-release plate (150 mm), precisely fitting M4 mounting screws in various lengths as well as M3 safety stop screws. A practical multi-tool is also included so that you can carry out the installation directly without having to provide additional tools. You unpack the replacement foot, mount it on your Canon EF 600mm f/4 L IS III USM or your Sony 600mm f/4 GM OSS FE and are ready for use in a short time without having to buy anything else.

Adjustable base on the main plate for optimal center of gravity

A key feature of this modular system is the base on the main plate, which is adjustable to allow optimal adaptation to the lens and the center of gravity of the lens-camera combination. Instead of a rigid, one-piece replacement foot, you can move the lens base along the entire length of the Wimberley P-40 plate and position the center of gravity exactly where it makes the most sense for your setup.

Whether you’re working with a lightweight mirrorless camera without a battery grip or with a heavy body with a vertical grip, whether you insert a teleconverter or not, the center of gravity shifts a little each time. With the modular OF-C-T, you can adjust the base so that the combination of lens and camera lies balanced on the tripod head. This is particularly noticeable on a gimbal head, where the system stays in position at any tilt instead of tipping forward or backward.

This turns the replacement foot into more than just a simple mounting solution; it becomes a true precision tool for balancing your telephoto setup. You can test different configurations and remember the setting that works best for your Canon RF 800mm f/5.6L IS USM with or without converter. That may sound like a small detail, but in daily use it’s a huge gain in comfort.

Stable quick-release base with Wimberley P-40 (150 mm)

The Wimberley P-40 quick-release plate with a length of 150 mm included in the set forms the solid base of the system. Its length provides sufficient range to move the base over a wide area while ensuring a large contact surface in the ARCA clamp. This increases stability, especially with very long focal lengths such as the Canon RF 1200mm f/8L IS USM or the Canon RF 800mm f/5.6L IS USM, where every tiny movement becomes visible in the image.

The plate is designed so that it integrates into your existing ARCA quick-release system without detours. In combination with the M3 safety stop screws, accidental slipping out of the quick-release coupling is prevented, even if the clamp is not fully opened or closed. This provides an additional safety net, particularly if you often work with a slightly loosened clamp to quickly adjust your framing.

Well-thought-out safety details with M3 safety stop screws

With heavy telephoto lenses, safety is not a luxury but a must. That’s why the scope of delivery includes M3 safety stop screws that you can mount at the ends of the Wimberley P-40 quick-release plate. These small but very important screws prevent accidental slipping out of the quick-release coupling if the ARCA clamp is opened too far or if the setup is not clamped exactly in the middle in the heat of the moment.

Especially in situations where things have to move quickly, such as on the sidelines of a football match or with suddenly appearing subjects in wildlife photography, this safety reserve is worth its weight in gold. You can loosen the clamp, move the lens or fine-tune the balance without constantly worrying that the entire camera and lens combination will tip downwards. It’s a small detail that makes a noticeable difference in practice.

Perfect for modern Canon RF and Sony FE super-telephotos

The list of supported lenses reads like a who’s who of modern super-telephotos. The OF-C-T replacement foot is designed for Canon EF telephoto lenses such as the Canon EF 400mm f/2.8 L IS III and the Canon EF 600mm f/4 L IS III USM, as well as for Sony FE telephoto lenses such as the Sony 400mm f/2.8 GM OSS FE [SEL400F28GM] and the Sony 600mm f/4 GM OSS FE [SEL600F40GM].

In the Canon RF system, the foot covers a whole range of current top-of-the-line lenses: from the Canon RF 400mm f/2.8L IS USM (2021) and Canon RF 600mm f/4L IS USM (2021) to the Canon RF 800mm f/5.6L IS USM (2022) and Canon RF 1200mm f/8L IS USM (2022) all the way to the versatile Canon RF 100-300mm f/2.8 L IS USM (2023). This means that even if you switch systems within the Canon world or use EF and RF in parallel (with adapter), you can use the same modular replacement foot without having to completely rethink your setup each time.

This makes the OF-C-T a long-term solution that can grow with your equipment. If you’re shooting with a Canon EF 400mm f/2.8 L IS III today and switch to a Canon RF 400mm f/2.8L IS USM tomorrow, the replacement foot remains a familiar part of your setup.

Practice-oriented design for everyday use, outdoor and long-term operation

In practical use, it becomes clear that the modular replacement foot doesn’t just look good on paper. The adjustable connection between base and main plate allows you to balance different camera bodies, teleconverters and accessory combinations cleanly. You can memorize a preferred position for each typical combination and quickly get back into your usual working rhythm.

The robust construction is intended for continuous use, whether in the rain on the coast, in a dusty stadium or in frosty temperatures early in the morning. The surface is easy to clean, and the screw connections are designed to hold reliably even after frequent repositioning. We have deliberately opted for a clear, functional design language that is oriented towards professional requirements without unnecessary frills.

All in all, with the modular replacement lens foot OF-C-T with Wimberley P-40 (150 mm), you get a well-thought-out, stable and flexibly adjustable solution for your Canon EF, Canon RF and Sony FE telephoto lenses that quietly but noticeably has your back in everyday use.