The result is attractive bokeh and more versatility in controlling the depth of field. This model was released by Minolta together with the unveiling of the A-mount. Because of the age of the lens, the autofocus is driven by the built-in motor in the A's body.
Coupled autofocus can be laggy and noisy. In the event that that's not an issue for you, the results are excellent. You will end up with a classic rendering and eye-catching bokeh. An additional great advantage of the lens is the price. That as expected comes at an additional expense. It is still a light and relatively compact lens that fits well on the A and will fit into almost any camera bag. Take into account that they can be very difficult to purchase in usable condition.
It also was constructed with physically coupled autofocus, which is slower and louder than lenses with built-in motors. Sony wanted to show off with this lens. Zeiss manufactured the lens. This is a great lens.
Tack sharp corner-to-corner with vibrant colors that renders astonishing portraits. A potential downside is that it is somewhat heavy due to being built like a tank and the autofocus can feel slow.
The Rokinon is a readily available inexpensive option. Cost savings are due to the fact that the lens is manual focus. In terms of price, the lens is between the other two. Finding a used copy in better than acceptable condition may be hard because of a small available supply. The lens does have autofocus, but it uses a mechanical coupler and is driven by an in-camera body motor.
This makes the lens somewhat noisy and sluggish. A Double-Gauss optical design is older and only uses a total of six lens elements. That's not a bad thing as the lens has a distinct look that can't be made using a contemporary lens. A fast zoom lens that is good for night events, travel, indoor shooting, and family photos. It is a well-constructed lens with quiet autofocus. It is often compared to the legendary Zeiss mm, but it is close to half the weight and costs considerably less.
Both lenses produce professional results. A lower-cost alternative that still produces outstanding results. It isn't a professional lens, therefore as long as you don't expect all the bells and whistles, it is an excellent lens.
As a telephoto zoom, it offers a terrific zoom range for taking images of wildlife, children outdoors, and sports. The autofocus is quick and it delivers razor-sharp photos. The body of the lens is plastic, which helps trim down on weight. This meets the criteria of a super-telephoto lens. It is a great cheap choice for any time you want a long focal length. It is 4.
While that is not light, many professional zooms are several times heavier. And, with a single press of the AF button on the A, the camera will continue to automatically determine focus for the user if required. Pictures from the A set at its automatic settings were evenly exposed, with natural colors. There are also pre-optimized Creative Style settings for those who prefer a more vivid look. Along with the innovative, Sony has also included some odd features on its flagship consumer SLR.
Since this is utilizing only a portion of the image, overall resolution inevitably drops. Incorporating some form of video capture might have been a better bet by way of an additional attention grabber. SLR newcomers who are easily intimidated when trying to use a camera more complicated than a point-and-shoot may find the Alpha A a lot easier to use than other SLRs. But with the disappointing plastic build and lack of video capture, you might be tempted to look elsewhere. Cons Distinctly plastic construction Tilting screen stiff and awkward Image noise visible at higher ISO sensitivity settings.
Top right of the A's screen we get a further Function 'Fn' button for those details we'd expected to find amidst the menus but didn't. Here for example we find the D-range optimiser, along with auto focus modes a choice of single shot, auto or continuous , metering multi segment, centre weighted or spot , white balance including custom setting , AF area wide, spot or local , plus Creative Style settings.
These pre-optimised user selectable settings run from the default of 'standard' through the self-explanatory vivid, portrait, landscape, night view, sunset and black and white. For each of these creative options, contrast, saturation and sharpness can be individually adjusted. Beneath the Function button we find a familiar four-way control pad. At the centre is a 'AF' button that comes in particularly handy when scrutinizing the screen in Live View mode.
Press this and, as with a press of the shutter release button, the camera will automatically and rapidly determine a point of focus for you. Underneath these options is a self-evident trash can button for deleting duff images on the fly, and beneath that again a playback button for the review of images.
As elsewhere, the A responds quickly and accurately to each button press letting the user concentrate fully on the business of taking great photographs. At the right hand side of the camera - as viewed from the back - is an eyelet for attaching the provided shoulder strap, just beneath which is a plastic cover for a supplementary power port power adaptor an optional extra.
Over at the left side, we discover the aforementioned very plastic feel sliding door that protects four ports. The camera doesn't automatically register which slot is in use - so a sliding switch is provided here too for the purpose of specifying recording to one or the other. Flipping the camera over and examining its base we discover a screw thread for attaching a tripod plus a flip open battery compartment.
Despite the supplied NP-FH50 battery for the A being physically small, it's mighty, delivering up to images if shooting via the optical viewfinder, though a much less impressive if using Live View - less than most compact snapshots in fact.
Giving the impression that the A is a beefed up entry level model, it nevertheless has just about every box ticked for those who want to take better looking photographs on an amateur or occasional basis. But what of the photographs themselves? Do the results seem to make the most of the marriage between lens and sensor, does on-board noise reduction work satisfactorily, and can decent results truly be had with the minimum of user input - given the camera's intended audience.
All of the sample images in this Review were taken using the When you marry a sensor with a high pixel count to a standard kit lens there's always a question mark over whether the combination is truly capable of resolving all those self same pixels.
For us, though there are plenty of subtleties of tone across the images from the Sony A, occasionally they could do with being a tad sharper. While such gripes can of course, to an extent, be 'put right' with subtle application of Photoshop's Unsharp Mask at the processing stage - or simply fitting a top-of-the-range Carl Zeiss branded optic - images also suffer from the very common complaints of barrel distortion at the lens' widest setting and pixel fringing, evidenced when zooming in close between areas of high contrast.
Still, when left on its default settings the A delivers a naturalistic array of colours, suggesting white balance is reliable, if grey featureless skies will inevitably result in underexposed foreground detail when shooting JPEG. Considering its target market the Sony A's ISO performance isn't bad - with on-board noise reduction implemented that is. OK, so image noise is noticeably lurking in the shadows at ISO , but by ISO noise reduction has kicked in, reducing the effects without smoothing out surrounding detail to a ruinous degree.
At ISO , as expected noise is more evident again and detail softer, resembling an Impressionist dot painting when zooming right in. But like those self same old masters, draw back from the image and everything comes back into sharp, clear focus. While Sony may not be pushing the envelope like Canon and Nikon when it comes to superior performance in low light, the A gives an adequate showing.
The right-hand image has had some sharpening applied in Photoshop. The out-of-the camera images are a little soft at the default sharpening setting.
You can change the in-camera sharpening level if you don't like the default look. The Sony A's mm kit lens handled chromatic aberrations very wellduring the review. There's slight purple fringing between areas of high contrast, but it's only noticeable on really close inspection, as shown in the example below. Red-eye Reduction is also available in the main menu. These shots of a white coloured wall were taken at a distance of 1.
And here are a couple of portrait shots. The Sony A's maximum shutter speed is 30 seconds and there's also a Bulb mode for longer exposures, which is great news if you're seriously interested in night photography. The shot below was taken using a shutter speed of 4 seconds at ISO
0コメント