|System:||● Sony A APS-C (2006)|
|Mount and Flange focal distance:||Minolta/Sony A [44.5mm]|
|Imaging plane:||23.5 × 15.6mm CMOS sensor|
|Resolution:||6000 × 4000 - 24 MP|
|Speeds:||30 - 1/4000 + B|
|Sensor-shift image stabilization:||Yes|
|Exposure metering:||Through-the-lens (TTL)|
|Exposure modes:||Programmed Auto|
DIEGO, Aug. 24, 2011 – Blazing speed, enhanced image quality, high resolution and incredible performance are just some of the features advanced amateurs and photo enthusiasts will find in Sony's newest alpha cameras, models SLT-A77 (α77) and SLT-A65 (α65).
Sony's latest refinements to its Translucent Mirror Technology make these new cameras the fastest, most responsive interchangeable lens cameras in their class, as well as set new performance benchmarks that even professional DSLRs have yet to achieve. The α77 and α65 both feature a newly developed Exmor™ APS HD CMOS sensor with 24.3 effective megapixel resolution, as well as the world's first XGA OLED Tru-Finder™ viewfinder. The sensor teams with the next generation of Sony's BIONZ® image processing engine to handle huge amounts of high speed data from the camera sensor, enabling unprecedented response times and flawless image quality with ultra-low noise when shooting still images or Full HD video.
"We feel that these cameras are not only a significant evolution of our breakthrough Translucent Mirror Technology," said Mike Kahn, director of the alpha camera business group for Sony Electronics. "They're also a revolution in terms of redefining how this unique technology can be put to use by enthusiasts."
The much anticipated successor to Sony's acclaimed α700 DSLR, the α77 boasts the world's fastest continuous autofocus (AF) shooting performance (among DSLRs in Aug 2011), capturing a burst of full resolution, 24 megapixel images at 12 frames per second with full-time phase-detection AF. The α65 achieves a similarly impressive 10fps shooting speed.
Precision AF tracking of moving subjects is more precise with the α77 due to a new 19-point autofocus system with 11 cross sensors. The α65 boasts 15-point AF with three cross sensors. Tracking Focus maintains accurate focus lock on a moving subject – even if the target is momentarily obscured. Additionally, a new electronic front shutter curtain achieves a minimum release time lag of approximately 50 milliseconds, comparable to much more expensive professional-class DSLRs.
The α77 and α65 further refine Sony's acclaimed Fast Continuous AF Full HD Movie shooting, already featured on previous Sony Translucent Mirror cameras. Phase Detection maintains accurate focus during video shooting of portrait subjects, even when they're moving at fast speeds.
Unprecedented image quality and creative options
A broad sensitivity range of ISO 100-16000 expands (α77 only) down to ISO 50. At the highest sensitivities, both cameras can freeze fast action or capture atmospheric low-noise shots without flash. Low ISO settings are ideal when used with a long exposure to create expressive shots, such as splashing water.
Both cameras showcase a remarkably crisp OLED Tru-Finder™ viewfinder, the world's first of its kind. With a 2359k dot (XGA) resolution, this precision electronic viewfinder offers a bright, highly detailed, high contrast image with 100 percent frame coverage and a wide field of view comparable to the most advanced class optical viewfinders.
However, unlike optical viewfinders, users have expansive customization capabilities through the XGA OLED Tru-Finder™ viewfinder and can preview the effects of adjusting exposure, white balance and other settings in real-time. Photographers can also make fine focus adjustments via a zoomed-in portion of the image.
The Smart Teleconverter displays an enlarged central portion of the image sensor, allowing compositions to be displayed clearly on the OLED viewfinder and captured as 12 megapixel images with a digital zoom factor of 1.4x or 2x.
In another first for DSLR cameras, both new models can capture Full HD video at 60p (progressive) frame rates – incorporating the recently introduced AVCHD™ Progressive (Ver. 2.0) format. Also, 24p shooting is available for capturing beautiful cinematic video footage. Manual focusing and P/A/S/M exposure modes, familiar to creative filmmakers, also can provide enhanced control during video shooting. Shooters can compose and review stills and video on the adjustable-angle three-inch Xtra Fine LCD™ display that offers high resolution (921k dot) and TruBlack™ technology for superb detail and contrast. As an extra refinement, the α77 introduces the world's first three-way adjustable screen that tilts and pivots freely for effortless framing at any angle (α65: two-way adjust LCD).
Revised ergonomics on both cameras include a comfortably contoured new grip design and tactile new button layout for 'eyes off' operation while viewing via the high-resolution XGA OLED Tru-Finder™ viewfinder.
The α77 adds front and rear control dials for intuitive fingertip operation and a separate top-mounted LCD data display. The durable body features magnesium alloy panels for strength and lightness. Key controls are sealed against the effects of dust and moisture, complementing similar levels of protection offered by the new SAL1650 lens, VG-C77AM Vertical Grip for α77 and HVL-F43AM flash unit. A new shutter unit on the α77 is tested up to 150,000 cycles and supports an ultra-fast minimum 1/8000 sec shutter speed (1/250 sec flash sync). On-board GPS allows automatic geo-tagging of photos and video clips with location data.
New DT 16-50mm F2.8 SSM zoom lens and accessories
The growing range of compatible A-mount lenses for both cameras now includes the quiet, bright DT 16-50mm F2.8 SSM standard zoom with 16mm wide angle coverage that's ideal for both portrait and everyday shooting.
The high-performance lens features a dust- and moisture-resistant design, and offers a zoom range of approximately 3x range at constant wide F2.8 aperture. Optical performance is assured by aspherical glass and three ED (Extra Low Dispersion) lens elements to minimize aberration at all focal lengths. An internal Super Sonic wave Motor (SSM) drive enables fast, quiet autofocus.
An optional dust- and moisture-resistant VG-C77AM Vertical Grip for α77 assures comfortable handling in vertical shooting positions. It can house up to two NP-FM500H InfoLITHIUM® batteries, doubling shooting stamina up to approximately 1060 shots (via LCD monitor)/940 shots (via Tru-Finder™ viewfinder) when using Memory Stick PRO Duo™ media. Other new A-mount system accessories include a back pack (LCS-BP2), soft carrying cases (LCS-SC21 and LCS-SC8), LCD protectors and eyepiece cups.
Among autofocus lenses designed for 35mm full-frame mirrorless cameras only. Speed of standard and telephoto lenses is taken into account.
You are already on the page dedicated to this lens.
Cannot compare the lens to itself.
A technology used for reducing or even eliminating the effects of camera shake. Gyro sensors inside the lens detect camera shake and pass the data to a microcomputer. Then an image stabilization group of elements controlled by the microcomputer moves inside the lens and compensates camera shake in order to keep the image static on the imaging sensor or film.The technology allows to increase the shutter speed by several stops and shoot handheld in such lighting conditions and at such focal lengths where without image stabilizer you have to use tripod, decrease the shutter speed and/or increase the ISO setting which can lead to blurry and noisy images.
Lens name as indicated on the lens barrel (usually on the front ring). With lenses from film era, may vary slightly from batch to batch.
Format refers to the shape and size of film or image sensor.
35mm is the common name of the 36x24mm film format or image sensor format. It has an aspect ratio of 3:2, and a diagonal measurement of approximately 43mm. The name originates with the total width of the 135 film which was the primary medium of the format prior to the invention of the full frame digital SLR. Historically the 35mm format was sometimes called small format to distinguish it from the medium and large formats.
APS-C is an image sensor format approximately equivalent in size to the film negatives of 25.1x16.7mm with an aspect ratio of 3:2.
Medium format is a film format or image sensor format larger than 36x24mm (35mm) but smaller than 4x5in (large format).
Angle of view describes the angular extent of a given scene that is imaged by a camera. It is used interchangeably with the more general term field of view.
As the focal length changes, the angle of view also changes. The shorter the focal length (eg 18mm), the wider the angle of view. Conversely, the longer the focal length (eg 55mm), the smaller the angle of view.
A camera's angle of view depends not only on the lens, but also on the sensor. Imaging sensors are sometimes smaller than 35mm film frame, and this causes the lens to have a narrower angle of view than with 35mm film, by a certain factor for each sensor (called the crop factor).
This website does not use the angles of view provided by lens manufacturers, but calculates them automatically by the following formula: 114.6 * arctan (21.622 / CF * FL),
CF – crop-factor of a sensor,
FL – focal length of a lens.
A lens mount is an interface — mechanical and often also electrical — between a camera body and a lens.
A lens mount may be a screw-threaded type, a bayonet-type, or a breech-lock type. Modern camera lens mounts are of the bayonet type, because the bayonet mechanism precisely aligns mechanical and electrical features between lens and body, unlike screw-threaded mounts.
Lens mounts of competing manufacturers (Canon, Nikon, Pentax, Sony etc.) are always incompatible. In addition to the mechanical and electrical interface variations, the flange focal distance can also be different.
The flange focal distance (FFD) is the distance from the mechanical rear end surface of the lens mount to the focal plane.
Lens construction – a specific arrangement of elements and groups that make up the optical design, including type and size of elements, type of used materials etc.
Element - an individual piece of glass which makes up one component of a photographic lens. Photographic lenses are nearly always built up of multiple such elements.
Group – a cemented together pieces of glass which form a single unit or an individual piece of glass. The advantage is that there is no glass-air surfaces between cemented together pieces of glass, which reduces reflections.
The focal length is the factor that determines the size of the image reproduced on the focal plane, picture angle which covers the area of the subject to be photographed, depth of field, etc.
The largest opening or stop at which a lens can be used is referred to as the speed of the lens. The larger the maximum aperture is, the faster the lens is considered to be. Lenses that offer a large maximum aperture are commonly referred to as fast lenses, and lenses with smaller maximum aperture are regarded as slow.
In low-light situations, having a wider maximum aperture means that you can shoot at a faster shutter speed or work at a lower ISO, or both.
The minimum distance from the focal plane (film or sensor) to the subject where the lens is still able to focus.
The distance from the front edge of the lens to the subject at the maximum magnification.
Determines how large the subject will appear in the final image. For example, a magnification ratio of 1:1 means that the image of the subject formed on the film or sensor will be the same size as the subject in real life. For this reason, a 1:1 ratio is often called "life-size".
Allows to perform final focusing manually after the camera has locked the focus automatically. Note that you don't have to switch camera and/or lens to manual focus mode.
Electronic manual focus override is performed in the following way: half-press the shutter button, wait until the camera has finished the autofocusing and then focus manually without releasing the shutter button using the focusing ring.
Provides highly accurate diaphragm control and stable auto exposure performance during continuous shooting.
The diaphragm must be stopped down manually by rotating the detent aperture ring.
The lens has two rings, one is for pre-setting, while the other is for normal diaphragm adjustment. The first ring must be set at the desired aperture, the second ring then should be fully opened for focusing, and turned back for stop down to the pre-set value.
The lens features spring mechanism in the diaphragm, triggered by the shutter release, which stops down the diaphragm to the pre-set value. The spring needs to be reset manually after each exposure to re-open diaphragm to its maximum value.
The camera automatically closes the diaphragm down during the shutter operation. On completion of the exposure, the diaphragm re-opens to its maximum value.
The aperture setting is fixed at F/ on this lens, and cannot be adjusted.
As a general rule, the more blades that are used to create the aperture opening in the lens, the rounder the out-of-focus highlights will be.
Some lenses are designed with curved diaphragm blades, so the roundness of the aperture comes not from the number of blades, but from their shape. However, the fewer blades the diaphragm has, the more difficult it is to form a circle, regardless of rounded edges.
At maximum aperture, the opening will be circular regardless of the number of blades.
Excluding case or pouch, caps and other detachable accessories (lens hood, close-up adapter, tripod adapter etc.).
For lenses with collapsible design, the length is indicated for the working (retracted) state.
A rubber material which is inserted in between each externally exposed part (manual focus and zoom rings, buttons, switch panels etc.) to ensure it is properly sealed against dust and moisture.
Lenses that accept front mounted filters typically do not have gaskets behind the filter mount. It is recommended to use a filter for complete weather resistance when desired.
Helps keep lenses clean by reducing the possibility of dust and dirt adhering to the lens and by facilitating cleaning should the need arise. Applied to the outer surface of the front and/or rear lens elements over multi-coatings.
Lens filters are accessories that can protect lenses from dirt and damage, enhance colors, minimize glare and reflections, and add creative effects to images.
A lens hood or lens shade is a device used on the end of a lens to block the sun or other light source in order to prevent glare and lens flare. Flare occurs when stray light strikes the front element of a lens and then bounces around within the lens. This stray light often comes from very bright light sources, such as the sun, bright studio lights, or a bright white background.
The geometry of the lens hood can vary from a plain cylindrical or conical section to a more complex shape, sometimes called a petal, tulip, or flower hood. This allows the lens hood to block stray light with the higher portions of the lens hood, while allowing more light into the corners of the image through the lowered portions of the hood.
Lens hoods are more prominent in long focus lenses because they have a smaller viewing angle than that of wide-angle lenses. For wide angle lenses, the length of the hood cannot be as long as those for telephoto lenses, as a longer hood would enter the wider field of view of the lens.
Lens hoods are often designed to fit onto the matching lens facing either forward, for normal use, or backwards, so that the hood may be stored with the lens without occupying much additional space. In addition, lens hoods can offer some degree of physical protection for the lens due to the hood extending farther than the lens itself.
Teleconverters increase the effective focal length of lenses. They also usually maintain the closest focusing distance of lenses, thus increasing the magnification significantly. A lens combined with a teleconverter is normally smaller, lighter and cheaper than a "direct" telephoto lens of the same focal length and speed.
Teleconverters are a convenient way of enhancing telephoto capability, but it comes at a cost − reduced maximum aperture. Also, since teleconverters magnify every detail in the image, they logically also magnify residual aberrations of the lens.
Scratched lens surfaces can spoil the definition and contrast of even the finest lenses. Lens covers are the best and most inexpensive protection available against dust, moisture and abrasion. Safeguard lens elements - both front and rear - whenever the lens is not in use.