Sigma 100-400mm F5-6.3 DG DN OS Fuji X-Mount Review | The Affordable Telephoto Zoom

Are you a Fuji X mount user in search of an affordable telephoto zoom lens? Look no further than the Sigma 100-400mm F5-6.3 DG DN OS. This versatile lens offers a wide range of focal lengths, making it ideal for capturing everything from nature and wildlife to sports and events. With its compact and lightweight design, this lens is perfect for on-the-go photographers who need a telephoto option without sacrificing portability. Plus, with the addition of Optical Stabilization (OS) technology, you can capture sharp and steady images even at longer focal lengths. In this review, we’ll take a closer look at the features and performance of the Sigma 100-400mm F5-6.3 DG DN OS Fuji X-Mount, so you can decide if it’s the right lens for your photography needs.

Sigma 100-400mm F5-6.3 DG DN OS Fuji X-Mount Review: The Affordable Telephoto Zoom


My name is Dustin Abbott and I’m here to give you my video review of the new Sigma 100-400mm F5-6.3 DG DN OS lens designed for mirrorless Fuji X-Mount cameras. This lens is unique as it is being ported over from the Sony e-mount full frame to the Fuji xmount aps-c platform, making it an intriguing addition to the Fuji lens lineup. In this review, we will explore its focal length, aperture, size, switch functionalities, and more to help you make an informed decision about this lens.

Focal Length and Size

The Sigma 100-400mm lens has a 1.5 times crop factor on Fuji cameras, making it the full frame equivalent of a 150-600mm lens. Despite being designed for a larger sensor, the lens is surprisingly compact and lighter compared to the Fuji 100-400mm lens, making it a more portable option for photographers. It weighs 1135 grams and has a diameter of 86mm and a length of 199.5mm, making it a desirable choice for photographers on the go.

Aperture Speed

While the Sigma lens has a maximum aperture of F5-F6.3, which is slower than the Fuji 100-400mm lens, it offers a slight differential on the telephoto end. However, it should be noted that the difference in brightness is minimal and may not significantly impact the overall performance of the lens.

Switch Functionalities

The Sigma 100-400mm lens features a bank of switches for AFL, AF, focus limiter, and optical stabilizer. The focus limiter is particularly useful in different focusing situations, and the optical stabilizer is rated for five stops, providing stable handheld results even in challenging lighting conditions. However, the raised design of the switch bank may pose some practical challenges during use, such as accidental position changes.


In conclusion, the Sigma 100-400mm F5-6.3 DG DN OS Fuji X-Mount lens offers a compelling value proposition for photographers seeking telephoto reach on their Fuji X-Mount cameras. Despite its slower aperture speed, it delivers equivalent build quality, better optical performance, and competitive pricing compared to the Fuji 100-400mm lens. While it may lack compatibility with teleconverters, the lens’s portability, switch functionalities, and optical stabilizer make it a worthy consideration for photographers looking to expand their telephoto capabilities.

Final Thoughts

Overall, the Sigma 100-400mm F5-6.3 DG DN OS Fuji X-Mount lens presents a compelling option for Fuji photographers seeking an affordable telephoto zoom lens. With its compact size, competitive pricing, and robust performance, it offers a viable alternative to the existing Fuji lens lineup. Whether you’re a wildlife, sports, or nature photographer, this lens provides the versatility and portability necessary to capture stunning telephoto images in various shooting scenarios.

Frequently Asked Questions about Sigma 100-400mm F5-6.3 DG DN OS Fuji X-Mount Review

Is the Sigma 100-400mm F5-6.3 DG DN OS Fuji X-Mount affordable?

Yes, the Sigma 100-400mm F5-6.3 DG DN OS Fuji X-Mount is known for being an affordable telephoto zoom lens option.

What is the lens mount for the Sigma 100-400mm F5-6.3 DG DN OS?

The Sigma 100-400mm F5-6.3 DG DN OS is specifically designed for Fuji X-Mount cameras.

Does the Sigma 100-400mm F5-6.3 DG DN OS have image stabilization?

Yes, the lens is equipped with Optical Stabilization (OS) to minimize the effects of camera shake.

What is the maximum aperture of the Sigma 100-400mm F5-6.3 DG DN OS?

The maximum aperture is F5 at the widest focal length and F6.3 at the longest focal length.

Is the Sigma 100-400mm F5-6.3 DG DN OS a good option for shooting wildlife and sports?

Yes, the telephoto zoom range and affordability make it a popular choice for wildlife and sports photography.

I hope you find useful my article Sigma 100-400mm F5-6.3 DG DN OS Fuji X-Mount Review | The Affordable Telephoto Zoom, I also recommend you to read my other posts in my blog at this link.

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