Sony α
Sony α (the lower case to 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[edit]
Sony Alpha was introduced on 5 June 2006.[1] 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,[2] 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.[3]
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.[4] 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.[5]
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.
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.[6]
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.[7]
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.[8] 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.[9][10]