Digital Camera Reviews

* Entry body can also be very tough
Although this is a entry-level SLR, but the parameters in the body A390 or very tough, with up to 14.2 million effective pixel APS-C format CCD sensor, CCD area of 23.5mm × 15.7mm of this size than the consumption level 1/2.5 inch sensor digital camera that’s big several times. Therefore, high light and shadows more details preserved, showing a more refined image quality. Continuation of the A330 design time can flip LCD, 2.7-inch 230,000 pixel LCD screen, live view and playback convenience. Another central focus Cross 9:00 system can allow users to use the former DC A390 experience to a high speed and precise when focusing experience.

In other configuration, A390 high-speed BIONZ image processor for automatic high-ISO noise reduction, in low-light shooting photos and night photos could maintain the natural and vivid color and exquisite picture quality. Stabilization times institutional uses inherited from Minolta CCD anti-shake systems, handheld shooting 2.5-3.5 files can slow down the appropriate shutter speed shooting. Using a 40 zone TTL metering system, cellular, combined with LCD live view system that allows users to more easily achieve accurate exposure. Supports up to 2.5 frames per second in continuous shooting function. Then we take a look at the details of the appearance of the camera.

* Appreciate the overall appearance

Sony A390 is still using a lightweight design, 128.1 × 97.1 × 83.5mm measurements for a size plus 497 g of body weight of the portable performance has been highlighted out. By observing the appearance of its image, we can clearly see the Sony A series of iconic orange camera lens mount ring and body-driven motor shaft.

Machine shell design with a black plastic casing, the handle and the right side of the fuselage skin using rubber design, this can increase the grip machine feel good, and easy to hand sweating in the summer time can also play an good anti-slip effect. Granular layer with a black camera body design, light, or rather, under certain texture mapping.
A390 dual memory card storage model supports both SD / SDHC also supports Sony’s own memory stick. A390 cabin at the top of the card can see a memory card switch by this switch, we can easily use on the Sony A390 types of memory card switch.
A390′s fuselage design followed the A330 back button traditional times, through the four-way navigation key to realize the camera flash, continuous shooting, and there are ISO’s control delay shooting, which is very similar to DC’s control, such a design can be or more users for the original DC is not a small operation convenience.
A390 uses a 870mAh lithium batteries as a power source, the official claim that the battery is fully charged, the case can guarantee the highest shooting about 500 photos, you can use live view shooting about 230. However, the actual use situation, according to the author, half in half using the live view using optical viewfinder and playback of each photo situation, probably shot about 200 when the camera shows the battery charge still last for a grid. The endurance capacity is evident.
* Appreciate the appearance of features: flip screen shot to bring the fun

Using inherited from the era of the traditional A330, A390 can be used the same 180-degree turn of the LCD screen, plus 230,000-pixel 2.7-inch display is sufficient for its capture and display real-time playback.

 A390 fuselage through the top, next to the viewfinder Oh OVF and LIVE VIEW mode switch button, we can go to ordinary optical viewfinder can be turned 180 degrees for easy viewing on the LCD.
 In real-time viewing enabled, optical viewfinder would be a small change inside. From the outside, we will find that there is a small viewfinder curtain will soon close, the device is on the right shoulder with the body OVF and live view change lever linkage. Next we look at the actual use of the auxiliary flip-screen film performance.
Flip screen in such a design can greatly facilitate the users to take the shooting position. Macro photography, flowers, themes and other crowded areas, the photographer could adjust the LCD to the right location for viewing, saving time to save your energy, become very easy to take pictures.
* Body Features: Cross-focus and simple operation

A390 by the Central Cross 9:00 AF system, cross-focusing system ensures the camera in the fastest time to complete precise focus, thus greatly accelerating the speed of the user to capture moments. A390 also has joined a EYE-START AF (eye start focus) function. When the user’s eyes close to the viewfinder when the camera would predict a broad focus range, so when users press the shutter to focus half the time, will speed up the body of focusing speed.

However, two words, although the eye can help us to speed up start focusing speed, but the startup mode in the eyes open state, no matter what the object close to the viewfinder, infrared reader, camera, AF will respond, even if the situation without the use of the camera , when we will hand on the frame when shooting will start this function, leading to unnecessary focus lens movement, not only electric charge but also the number of components of the lens focus is a loss.

* Colorful and easy to use menu options

Said before, A390 is a design for the entry-level SLR camera users, not only in the layout of buttons on its body, but also reflected in its operation menu, 4 colors of the user interface to adapt to different use groups SLR needs.
We also observe that, in the mode wheel for the user preset except P, M, A, S, AUTO mode of these things are common, such as portrait, scenery, night scene of the 7 other shooting modes.
We see that option in the A390 behind each model will have a shot prompts, the user can guide prompted the shooting. And a wealth of shooting modes will also help users to quickly capture a satisfactory image.
* Objective test: the resolution and lens distortion control

The author tested the A390′s standard set of aircraft (A390 plus a DT18-55mm lens), then I will be in Zhongguancun Online Testing Center Room Digital Imaging evaluation of this combination of resolution and lens distortion test, and the author The test will be for the A390 with DT18-55mm at F8.0 aperture (the best imaging aperture file) under the resolution test.

From the test results we can see that in the A390′s 14.2 million pixel CCD help, DT18-55mm the kit lens showed excellent performance close to 2,500 points, which compared with the performance of the A330 on a small increase of about 500 points . Performance in the telephoto end of the wide-angle side than down though, but it also points to nearly 2,200 results, which also belong to the first year for this set of good performance of the.
18mm in APS-C frame equivalent to 27mm (35mm equivalent focal length), we can seen this hedging in the wide-angle end of the barrel distortion on the performance of or clear. 55mm telephoto end is equivalent to 82mm, pincushion distortion problems and generally do not show up. From the actual test results show the situation there really is no pincushion distortion of the evidence.
· ISO100-3200 sensitivity test

A390′s CCD size reached 23.5mm × 15.7mm, and has 14.2 million pixels, by Sony’s BIONZ image processor, heirloom-level processing of full support, A390′s ISO adjustment range from ISO100 to 3200. Next we will remain in Zhongguancun Online Testing Center for Digital Imaging evaluation room, ISO sensitivity of their performance at all levels of quality testing.

From the above test chart we can see, A390′s sensitivity performance level by level, basically reached a common SLR picture quality that should be shown. Basically, under the picture presented in the ISO400 quality office delicate, expressive, good color, good shadow detail performance characteristics. But when the ISO to 800 after the noise began to increase significantly, especially in the characters hair and the color screen color block “purple” these low light areas, variegated performance significantly. ISO3200 Although the picture color and detail preservation of the still good, but the increase has been so variegated picture almost lost value. So I recommend that users will use the A390 when the best ISO setting to use the following in the ISO400.
Samples taken by the Sony A390 we have seen, this sets the fuselage on the performance of red and green still very strong, very good when the lighting conditions when, A390 at ISO100 the pictures taken under natural light and delicate images of the next colors depict the also very beautiful. However, when confronted with the situation of poor illumination conditions, the author will be raised slightly and a number of ISO, we can see that, although the ISO increased and then when the screen is so delicate like ISO100, ISO200, and ISO400, however the other films in the next Characterization of the details still have to play good.
 Thanks to this camera’s flip-screen, a lot of inconvenient to hold up the camera in the scene, the photographer can make a very comfortable shooting, and shooting 95% of the shooting range to 2.7-inch LCD projection screen on time, that can help take to complete a better composition. In low light conditions, CCD anti-shake technology can still play a good role in maintaining body stability.
* Evaluation Summary: easy to use, easy to shoot good pictures

    A390 based on its predecessor developed from the A330, with 14.2 million pixel APS-C size CCD, the low quality when shown a strong sense of delicate texture. Fine screen and because the imaging characteristics of CCD for red green can also show very strong bright colors. 2.7-inch flip screen is very convenient in use, not only helps the photographer easily select the best shooting angle, but also to deceive the public can play a role, together with A390′s shutter sound is still relatively light, which for Street beat documentary on the subject matter there will certainly be helpful to grasp. Mode options plus many more models Features, almost to the first use of the camera and shoot beginners quick start satisfying work. Traditional advantages of CCD Anti-Shake technology, anti-shake is very obvious secondary effect. A390 aircraft currently in the market sets the price floating around in the more than 3600 yuan. The lens plane to look at the price of aircraft, only 2,000 odd body price, compared to the top of the DC current market prices easily more than 3000 yuan, A390′s cost is more prominent.

* Advantages: 180 degree turn live view screen to facilitate viewing
        CCD Anti-Shake technology Stabilization effect is obvious
        Accessibility menu rich and strong functional design

* Less than: high sense of control to noise needs to be strengthened