science

Sony α

Sony α is a science 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 Sony α rather than just read about it. In short: Sony α (the lower case Greek letter alpha, often transliterated as Sony Alpha) is a brand of digital camera. This line has been active since 2006, building upon the Konica Minolta camera technologies, whose assets were acquired by Sony.

Key takeaways

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

Reference excerpt

Sony α (the lower case Greek letter alpha, often transliterated as Sony Alpha) is a brand of digital camera. This line has been active since 2006, building upon the Konica Minolta camera technologies, whose assets were acquired by Sony.

Overview Sony Alpha was introduced on 5 June 2006. It builds on existing Konica Minolta technologies including the Minolta AF SLR lens mount, whose assets were acquired by Sony after the end of Konica Minolta's photography operations in early 2006. Sony also has an 11.08% ownership stake in Japanese lens manufacturer Tamron, which is known to have partnered with Konica Minolta and Sony in the design and manufacture of many zoom lenses. Prior to the acquisition by Sony, the α branding had already been used on the Japanese market by Minolta for their AF camera system (marketed as "Dynax" in Europe, and "Maxxum" in North America). Sony adopted the name "A-mount system" for the Minolta AF lens mount, which has been retained in their new SLR range. Sony's entry into the DSLR market dates back to July 2005 where a joint venture with Konica Minolta would have resulted in both companies marketing an updated line of DSLRs to consumers. Between 2006 and 2008 Sony was the fastest growing company on the DSLR market, reaching 13% market share in 2008 to become the third largest DSLR company in the world. Sony announced plans to introduce a special camera service programme for professional photographers since the launch of the α900 in 2008. Sony Imaging PRO Support (a.k.a. SPS) was finally established starting between 2013 and 2015 depending on country.

Camera bodies

The Sony α model system follows a straightforward principle: each model in the series builds upon the features of its predecessor. For instance, the α330 incorporates all the capabilities of the base model α230 but adds a tilt-angle LCD and Quick AF Live View. Moving up the series, the α380 inherits the settings of the α330 but boasts an increased resolution of 14.2 megapixels. Only a few Sony APS-C DSLRs have Live View, except for the Sony α100, α200, α230, α290, α700, α850 and α900 series. Live View mode offers a 1.4x or 2x Smart Teleconverter, digitally zooming in on the subject while maintaining a 1:1 pixel reproduction ratio. This innovative approach ensures that picture quality remains uncompromised even during digital zoom, enhancing the overall photography experience. In 2010 Sony replaced the legacy DSLR design with SLT cameras, where the "SLT" stands for "single-lens translucent" which refers to a fixed beam splitter in the image path. Sony SLT can shoot movie files at Full HD 1080p AVCHD with continuous phase detection autofocus. Along with the α33 and α55 cameras, Sony also announced one of the last Sony DSLRs - the α560 which can also shoot movie files at full HD stereo 1080p AVCHD, but with limited manual controls and no continuous AF. These three cameras use the same technology Sony Exmor APS HD CMOS sensor. The α33 and α55 are SLT based (fixed translucent mirrors) and can take movie files with continuous Auto Focus, whereas DSLRs using reflex mirrors typically cannot, at least not without limitations.

A-mount lenses

The A-mount, originally known as the A-type bayonet mount, was introduced by Minolta in 1985 as the world's first fully integrated SLR autofocus system. As a result, all Minolta A-mount lenses can be used on Sony DSLRs (except for that some newer camera features cannot be used), and all Sony A-mount lenses work on Minolta's film and digital SLRs (except for that SSM/SAM lenses can be used only with manual focusing on cameras not supporting SSM and that APS-C format lenses cannot reasonably be used on film cameras due to their smaller image circle). During the initial introduction of the α system in 2006, Sony announced 19 lenses and 2 tele-converters, of which the majority were rebranded Konica Minolta lenses. At the 2007 PMA trade show, Sony unveiled several new lenses, but referred to them only in qualitative terms and did not provide specifications. On 18 May 2009, Sony introduced the first A-mount lenses to feature their new SAM (Smooth Auto-focus Motor) in-lens auto-focus motor for more lens-specific AF speed improvements. This introduction was made with the new "+30" series camera bodies (α350 + 30 = α380). These new bodies retain an in-body focus motor for backward compatibility with the historic lens collection. In addition, the new bodies utilize HDMI output for display on HDTV sets and feature dual memory card slots for both Sony's proprietary Memory Stick Pro Duo chips as well as SDHC media format, while eliminating CompactFlash support.

E-mount lenses

In May 2010, Sony introduced two α NEX mirrorless interchangeable lens cameras equipped with the new proprietary Sony E-mount. A-mount lenses can be used in E-mount cameras with an adapter - five different adapters are available from Sony alone. This includes mirrorless cameras as well as camcorders. First they were all called "NEX", but this name has been dropped for "ILCE" for the mirrorless stills cameras.

Other accessories

Flash system

… excerpt ends here. Continue reading the full article.

Illustrations

Worked examples

Example 1 — a first encounter with Sony α

Start with the simplest possible case. Write down what Sony α claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, 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 Sony α 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 Sony α 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 Sony α

In research: Sony α appears in science 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 Sony α 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: Sony α is common in secondary-school and first-year university syllabi. It links to neighbouring topics Cameras introduced in 2006, Japanese inventions, Lens mounts, so understanding it makes those chapters shorter.
In everyday life: Look for Sony α 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 Sony α in 20 minutes

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

Frequently asked questions

What is Sony α in simple terms?

Why does Sony α matter?

Because it connects several science 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 Sony α?

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 Sony α.