physics

Pierre Angénieux

Pierre Angénieux 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 Pierre Angénieux rather than just read about it. In short: Pierre Angénieux (French pronunciation: [pjɛʁ ɑ̃ʒenjø]; 14 July 1907 in Saint-Héand – 26 June 1998) was a French engineer and optician, one of the inventors of the modern zoom lenses, and famous for introducing the Angénieux retrofocus. Biography Angénieux graduated from the École Nationale Supérieure d'Arts et Métiers in 1928, and from the École Supérieure d'Optique the next year.

Key takeaways

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

Reference excerpt

Pierre Angénieux (French pronunciation: [pjɛʁ ɑ̃ʒenjø]; 14 July 1907 in Saint-Héand – 26 June 1998) was a French engineer and optician, one of the inventors of the modern zoom lenses, and famous for introducing the Angénieux retrofocus.

Biography Angénieux graduated from the École Nationale Supérieure d'Arts et Métiers in 1928, and from the École Supérieure d'Optique the next year. He was a student of Henri Chrétien. After working for Pathé, Angénieux founded a company specialising in cinema equipment in 1935, Les Etablissements Pierre Angénieux. He started using Geometric optics rather than Physical optics in the design of his lenses, as Carl Zeiss and Ernst Abbe did, and developed computing methods decreasing the time needed to design a lens by an order of magnitude.

In 1950, Angénieux introduced the Angénieux retrofocus, which allowed mounting wide-angle lenses on Single-lens reflex cameras. In 1953, Angénieux designed the fastest lens of the time, reaching f/0.95. The design was used in the Bell & Howell 70 series cameras for 35 years.– In 1956, Angénieux designed a constant aperture 17-68mm zoom lens, and a 12-120mm in 1958. Angénieux' company provided NASA with photographic equipment used in the Ranger program, Project Gemini, Apollo program, Apollo-Soyuz Test Project and the Space Shuttle program. Notably, the first high-resolution photographs of the Moon, by Ranger 7, were made with a 25 mm f/0.95 lens. In 1964, Angénieux received a Scientific or Technical award "for the development of a ten-to-one Zoom Lens for cinematography." He was honoured with the Grand Prix des Ingénieurs Civils in France in 1973, and with the 1989 Gordon E. Sawyer Award. His company also produced lenses for the Kodak Retinette and Pony cameras. In 1993, Angénieux' eponymous company was acquired by Thales Group and renamed Thales Angénieux. The company still specializes in optical, electro-optical and optical-mechanic products. Since 2013, Thales Angénieux organizes every year on the occasion of the Cannes Film Festival the Pierre Angénieux Excellens in Cinematography ceremony to pay tribute to a prominent Director of Photography for its career.

Reference and notes

External links Pierre Angénieux (in French) Pierre Angénieux on Gadzarts. Angenieux website

Worked examples

Example 1 — a first encounter with Pierre Angénieux

Start with the simplest possible case. Write down what Pierre Angénieux 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 Pierre Angénieux 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 Pierre Angénieux 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 Pierre Angénieux

In research: Pierre Angénieux 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 Pierre Angénieux 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: Pierre Angénieux is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1907 births, 1998 deaths, Academy Award for Technical Achievement winners, so understanding it makes those chapters shorter.
In everyday life: Look for Pierre Angénieux 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 Pierre Angénieux in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Pierre Angénieux 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 Pierre Angénieux out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Pierre Angénieux in simple terms?

Why does Pierre Angénieux 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 Pierre Angénieux?

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 Pierre Angénieux.