Sony Alpha 7

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Sony ILCE-7
Sony Alpha ILCE-7 (A7) full-frame camera no body cap.jpg
Type Mirrorless interchangeable lens camera
Sensor 35.8 x 23.9mm Exmor full-frame HD CMOS Sensor
Maximum resolution 6000 x 4000 (3:2) (24 megapixels)[1]
Lens Sony E-mount
Shutter Electronically-controlled, vertical-traverse, focal-plane shutter
Shutter speed range 1/8000 - 30 sec, BULB
Exposure metering Multi-segment, Center-weighted, Spot
Focus modes Contrast Detect (sensor), Phase Detect, Multi-area, Center, Selective single-point, Single, Continuous, Face Detection, Live View
Continuous shooting 5 frame/s
Viewfinder Built-in 2.4 million dots OLED Electronic viewfinder
ASA/ISO range Auto, 100-25600
Rear LCD monitor 3.0 in (76 mm) Tilting XtraFine LCD, 1,230,000 pixels
Storage Memory Stick Pro Duo, Pro-HG Duo, SD, SDHC, SDXC
Battery NP-FW50, InfoLITHIUM, 7.2 V, 1080 mAh, 7.7 Wh, Lithium-Ion rechargeable battery
Dimensions 127 x 94 x 48 mm
Weight Approx. 474 g (16.7 oz) (camera body, card and battery)

The Sony ILCE-7, ILCE-7R and ILCE-7S (α7/α7R/α7S) are three closely related digital cameras announced 16 October 2013[2] and 6 April 2014. They are Sony’s first full-frame mirrorless interchangeable lens cameras and share the E-mount with the company’s smaller sensor NEX series. They are targeted at experienced users, enthusiasts and professionals.[3]

Sony's new model naming prefix strives to unify model names. “ILC” indicates Interchangeable Lens Camera followed by an indicator of A-mount “A” or E-mount “E”[4]

The products are more commonly known as the α7 and α7R. Pre-annoncement rumours speculated that the new camera would be named Sony NEX-9.[5]

Although the α7 and α7R use full frame sensors and have a DSLR-shaped design, their sizes and weights are less than Olympus OM-D E-M1 with its small micro four thirds sensor and can also be compared with the lightest Fullframe DSLR.[6] Compared to the smallest and lightest APS-C DSLR Canon EOS 100D, the α7 is 67 grams heavier and a bit larger, but the thickness is only two thirds of Canon's.[7] The α7 price is significant lower than a comparative Fullframe DSLR price, but still higher than that of a low or mid-end compact camera price.[8] Compared to the Nikon D800E, the weight of Sony α7R is only about a half and the price is about two-thirds, a maximum image quality in a compact body, but lacks of built-in stabilization, slower Single AF and Continuous AF, and has no built-in flash.[9]

Variations[edit]

There are two different types of cameras available in the α7-series. They are the α7 & α7R.

The "R" model is the "resolution" version of the series, with a new, higher-density sensor design, and priced $600 more than the α7 at launch, but has no optical low-pass filter as the sibling has. However, the α7R does not include the faster hybrid auto-focus system found on the lower-resolution model.

Model differences[edit]

α7[edit]

  • 24.3 megapixel Exmor HD CMOS sensor.
  • Optical low-pass filter.
  • 5 fps max speed.
  • Fast Hybrid autofocus system (Phase Detection AF + Contrast-Detection AF) with 117 points

α7R[edit]

  • 36.4 megapixel Exmor HD CMOS sensor.
  • No optical low-pass filter.
  • 4 fps max speed.
  • 25 point for Contrast-Detection AF

α7S[edit]

  • 12.2 megapixel Exmor HD CMOS sensor.[10]
  • 4K video. * requires a 4K compatible recorder [11]
  • ISO 50 - 409600 (Extended range).

Features (universal for α7-series)[edit]

  • Exmor APS HD CMOS full frame sensor (With different megapixels depending on camera version)
  • TruBlack XtraFine LCD screen (3"/ 7,5 cm) with 921.6K dots resolution with tilt functionality.
  • 1.3 cm (0.5inch) Electronic Viewfinder.
  • 1200-zone evaluative light metering.
  • Built-in Wi-Fi and NFC.
  • LED-auto focus illuminator.
  • Multi Interface Shoe.
  • 9 customizable buttons and 45 assignable functions.

Reception[edit]

The cameras received positive reception from the critics. DxOMark crowned the α7R as the highest full frame with sensor quality by a mirrorless camera with the score of 95 and has same score with Nikon D800, but one point behind of Nikon D800E,[12] while the sibling has score of 90 and better than Nikon Df, Nikon D4 professional DSLR camera and Sony SLT-A99.[13] The Verge rated the cameras 8.3 out of 10 commenting that "It might be a few years before we realize it, but when the DSLR is relegated to a niche status among specialty photographers and full-frame mirrorless cameras dominate the market, we’ll have the α7s to thank as the cameras that started it all."[14] EPhotozine which rated the α7 rated 5 stars, meanwhile praised the α7's price for being "the cheapest full-frame digital cameras currently available" while being lighter and smaller than comparable cameras.[15] It awarded the α7 as the "Camera of the Year."[16] The α7R was awarded by Imaging Resource as the "Camera of the Year".[17]

References[edit]