physics

Viltrox

Viltrox is a physics topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Viltrox rather than just read about it. In short: Viltrox is a Chinese brand of lenses and other photographic accessories, established in 2009 by Shenzhen Jueying Technology Co., Ltd in Shenzhen, China. History 2009 – brand launch 2018 – first manual focus lens 2019 – first autofocus lens 2022 – start of current series lineup 2025 – joined L-Mount Alliance In mid-2022, Viltrox representative reported that company has been told by Canon to stop selling all RF mount…

Key takeaways

Viltrox belongs to physics; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Viltrox to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Viltrox from memory before moving on to harder problems.

Reference excerpt

Viltrox is a Chinese brand of lenses and other photographic accessories, established in 2009 by Shenzhen Jueying Technology Co., Ltd in Shenzhen, China.

History 2009 – brand launch 2018 – first manual focus lens 2019 – first autofocus lens 2022 – start of current series lineup 2025 – joined L-Mount Alliance In mid-2022, Viltrox representative reported that company has been told by Canon to stop selling all RF mount products. At that point only one such lens (85mm f/1.8 for full frame) was produced by Viltrox. In January 2026, some websites reported Nikon filing a patent infringement lawsuit against Viltrox in China. Lawsuit wasn't acknowledged by either side, and new lenses for Nikon Z-mount have since been released by Viltrox and other third-party manufacturers.

Products Viltrox makes wide range of photographic equipment, including photo and cinema lenses, lens adapters, teleconverters, flash units, video lights and external camera monitors.

Photographic lenses Modern lineup consists of following series of lenses for mirrorless cameras:

Lab – flagship lenses with largest apertures and premium features Pro – high-end lenses with large apertures and VCM autofocus motors Evo – mid-range lenses with smaller apertures Air – compact lightweight lenses with minimal controls Chip – pancake-style lens without manual controls DF and C – initial series of Viltrox autofocus lenses (for full frame and crop sensors respectively) For higher-end lenses Viltrox uses glass supplied by Hoya.

Autofocus prime lenses

For full frame cameras

These lenses create full frame-covering image circle, but some of them also exist in versions for Fujifilm X-mount, which is only used in cameras with APS-C sensors. Discontinued models:

DF 35mm f/1.8 DF 50mm f/1.8

For APS-C cameras

Manual focus lenses MF 20mm f/1.8 – full frame (E, Z mounts) MF 85mm f/1.8 – full frame (E-mount)

Cinema lenses

EPIC full frame anamorphic lenses Manual focus, PL mount, 1.33x squeeze ratio, 3 flare options (blue, silver, no flare):

25mm T2.0 35mm T2.0 (+E, L, RF mounts) 50mm T2.0 (+E, L, RF mounts) 65mm T2.8 Macro 75mm T2.0 (+E, L, RF mounts) 100mm T2.0 135mm T2.4

Luna cinema zoom lenses Manual focus, 10x zoom:

30-300mm T4.0 (46.5mm image circle) 42-420mm T5.6 (60mm image circle)

Cine Micro Four Thirds lenses Manual focus, Micro Four Thirds mount:

23mm T1.5 33mm T1.5 56mm T1.5

Raze lenses for DJI Ronin 4D Autofocus, DL mount:

16mm f/1.8 24mm f/1.8 28mm f/1.8 35mm f/1.8 50mm f/1.8 85mm f/1.8 90mm f/3.5 (not in the Raze series)

Other products EF and E-mount teleconverters Autofocus adapter for manual focus PL lenses Mount-to-mount lens adapters: DSLR-to-mirrorless, and E-to-Z mount Macro extension rings Speed boosters Lights and on-camera flash units External camera monitors External batteries and power banks

See also List of photographic equipment makers L-Mount Alliance

References

Worked examples

Example 1 — a first encounter with Viltrox

Start with the simplest possible case. Write down what Viltrox claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In physics, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Viltrox before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Viltrox ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Viltrox

In research: Viltrox appears in physics research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Viltrox in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Viltrox is common in secondary-school and first-year university syllabi. It links to neighbouring topics Chinese brands, Lens manufacturers, Manufacturing companies based in Shenzhen, so understanding it makes those chapters shorter.
In everyday life: Look for Viltrox outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Viltrox in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Viltrox means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Viltrox out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Viltrox in simple terms?

Viltrox is a Chinese brand of lenses and other photographic accessories, established in 2009 by Shenzhen Jueying Technology Co., Ltd in Shenzhen, China. History 2009 – brand launch 2018 – first manual focus lens 2019 – first autofocus lens 2022 – start of current series lineup 2025 – joined L-Mount…

Why does Viltrox matter?

Because it connects several physics ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Viltrox?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Viltrox.