Single Power

Single power: a new word, just as its name implies, means the use of an electronic viewfinder ( EVF ) and has a digital SLR function ( such as interchangeable lenses, with rapid phase detection autofocus, larger image sensor size etc ) camera. In 2010 August, the first Sony digital single electric camera -- SLT-A55 and SLT-A33. " Single" is the trademark of Sony company.

Single power

In Sony's" single electric camera before," early" single" only partial netizen imitation" SLR" name abbreviation to Olympus, Panasonic, Samsung, used to represent the consumer electronics giant launched without a mirror, using an electronic viewfinder, like the SLR Lens replacement products.

Single electric camera

Since the sony company launched the " micro single camera" and" single electric camera"," single electric camera" has a more clear concept: with a full manual operation, using a unique fixed half lens technology, in order to uphold the digital SLR good imaging effect at the same time, can provide full time fast phase detection autofocus and WYSIWYG electronic framing effect. The fixed half lens technology effectively to avoid the traditional digital SLR camera when shooting the reflector lifting and falling caused by vibration and during this period were unable to phase detection autofocus. Sony digital single electric camera SLT-A55 / A33 roll out, set off a revolution in imaging. Also on the" single" name, open a new interpretation.

Future development

The history of human development, no one can always brilliant. In the film time, since the storage memory medium -- film in the view must be in strict protection can not be leakage, and SLR skillfully uses the mirror can not only solve the viewfinder parallax problem, but also avoid the film in framing light leakage. The film time, SLR camera technology pushed to top.

However, entered the digital age, there is a fundamental change -- CCD is not afraid of light leakage. It can be used to view, also can be in the clear after used for imaging, therefore, mirror the necessity of existence have greatly reduced, its working principle, determines the mirror framing is not suitable for digital photography, in can fully realize all electronic digital cameras, there is no need to retain a mechanical components -- Reflecting mirror. Although both through the lens and the protection film light leakage and enable people to the reflector heavy and complicated structure can be tolerated, but today's digital image sensor is not afraid of the leaky characteristics, the reflector presence becomes is not necessary, as the electronic viewfinding technology perfected, some day in the future, the definition and the electronic viewfinder brightness will sooner or later be good enough to replace the mirror.

The shortcomings

As good lost as found. The single electricity in to avoid the traditional digital SLR camera when shooting the reflector lifting and falling caused by vibration and during this period were unable to phase detection autofocus disadvantages at the same time the corresponding will also have some problems.

First, a single electric viewfinder of the observed images as a single lens reflex camera from the same through the lens of the light directly generated, single electric viewfinder image on screen from the circuit to the actual transmission signal. Because of this, the single electrical imaging requires two times the inverse signal conversion, external circuit transfer also need time, thus making the single electronic viewfinder picture has lagged behind. Of course, this kind of lag is very subtle, but to a good photographer precise framing is very important, which is currently the most photographers prefer SLR reason.

In addition, or due to a single electric different from SLR using electronic viewfinder system, there is no doubt that it will bring more compared with single power consumption. Although the manufacturer to consider this point corresponding to adopt some measures, but the battery capacity will undoubtedly bring the weight increased, and in the concept of environmental protection, people are more willing to choose an energy saving way for photography creation.

With the development of technology and progress, single electric image consistency above will have a great progress, but we all know that the speed of light propagation in absolute fast electrical signal speed. Therefore, single electric imaging lag and SLR mirror movements bring jitter are flawed, SLR can pass through the reflective mirror for pre avoid jitter, single power is inevitable phenomenon of hysteresis, this can say is the bane of a single electric.