2013年8月2日 星期五

First Impressions

The Panasonic GX7 compact system camera follows in the footsteps of 2011's DMC-GX1 mirrorless, and like that camera, its mission is to provide a worthy street shooter for the enthusiast photographer. Thanks to a mirror-free design, the GX7 pares off most of the bulk of an SLR -- but it's still big enough to include a comfortable handgrip and the array of controls experienced photographers expect. And unlike many CSCs, which retain a DSLR-like design aesthetic, the GX7 cuts a more unassuming profile not unlike that of a rangefinder camera.

We were fortunate to have some hands-on time with a pre-production GX7 before launch, and came away impressed with Panasonic's commitment to the GX-series. This is no mere level-up with a few more megapixels: Many of the most important features are brand-new. Largely due to a more comfortable handgrip and a built-in electronic viewfinder, the Panasonic GX7 has grown in size a little. So, too, did its predecessor, but on paper at least the GX7 has seen much greater changes on the inside.

Key among the new features of the Lumix GX7 are the pairing of both a tilting LCD monitor, and an electronic viewfinder. The latter in particular will likely prove popular with the GX7's target demographic. Framing through a viewfinder -- even an electronic one -- gives you a much greater sense of attachment to your subject than does the arm's-length framing used for smartphones and entry-level cameras. And by building the viewfinder into the design, rather than making it an optional accessory, Panasonic ensures that you'll always have it with you when you need it. Better still -- and unlike almost all built-in viewfinders -- the Panasonic GX7's finder tilts, too. That means you needn't lose the connection with your subject when shooting from a lower angle.

The Panasonic GX7 also features a brand-new image sensor that will, according to its maker, provide a great leap forwards in image quality. Resolution is unchanged at 16 megapixels, but the new chip features a redesigned structure for both photodiodes and microlenses. And in a first for the Lumix mirrorless line, that sensor is mounted on a movable platter, allowing it to offer in-body image stabilization as well.

The Panasonic Lumix GX7 sports a handsome new design that -- in the US market, at least -- will be available only in a two-tone finish. Silver-colored plates top and bottom bookend a black-finished mid section that's largely wrapped in textured rubber. Beneath, the GX7's body is crafted from die-cast magnesium alloy.

Compared to its predecessor, the Panasonic GX7 sports a much more prominent, wider handgrip that's nicely contoured for your fingers to wrap around. The GX7 has grown in both size and weight, but not unduly so given that it must fit in quite a few features which were absent from its predecessor, including an electronic viewfinder, articulation mechanisms for both the viewfinder and LCD, and the sensor shift mechanism used to provide in-camera shake reduction.

Seen from the front, the Panasonic Lumix DMC-GX7 is an altogether more handsome camera than was the GX1. The lens mount has moved closer to the left-hand edge of the camera (as seen from the rear), making way for the new, larger hand grip. Indeed, the lens release button is now almost flush with the leftmost edge of the GX7's body. The move has left no room for the AF assist lamp on this side, either, and so it has jumped across the lens, and now rests in the top of the textured rubber handgrip.

The changes don't stop there, either. The rear of the camera is also significantly different. Most visible are the new electronic viewfinder, and the tilting LCD monitor. Panasonic has also added two new controls,Are you still hesitating about where to buy bestparkingguidance? and relocated several others.

To the left of the Rear dial,An bestgemstonebeads is a device which removes contaminants from the air. the AF/AE Lock button is encircled by a new Focus mode switch. Directly beneath is the Function 1 button, which also serves as the Quick Menu button.We have a great selection of blown glass backyard solar landscape lights and partypaymentgateway. These functions previously resided in the four-button group around the Four-way controller, and in their absence, the Play button has moved into this group.

We've mentioned previously that it's now mounted on a movable platter,Now it's possible to create a tiny replica of Fluffy in handsfreeaccess form for your office. and so provides for sensor-shift image stabilization. According to Panasonic, it should be "nearly as effective" as the company's lens-based MEGA O.I.S system. If you mount a stabilized lens, though, the in-lens stabilization will take over, and the sensor shift system will be locked in place. The big advantage of the in-body system is that it will work with all of your otherwise-unstabilized lenses. There's no price premium for stabilization with each lens purchase, because you bought stabilization along with the camera. At longer focal lengths where optical stabilization typically works better, however, you can still choose to buy a stabilized lens. You get the best of both worlds, and that's great news!

The readout circuitry -- both in the pixel itself and in the readout amplifiers -- has also been improved, and we understand there's been around a 25% improvement in signal to noise ratio, along with a 10% improvement in detail reproduction.

Noise reduction, too, has been improved, courtesy of the same Venus Engine image processor used in the Lumix G6. A new algorithm removes low and high-frequency noise separately, working on the raw image data. For JPEG images, there is another round of noise reduction performed after the JPEG conversion process. Also of note is that the detection area used by the noise reduction algorithm has grown from just 13 x 13 pixels to a much more generous 128 x 128 pixels, giving better information for it to work from.You must not use the stonecarving without being trained.

The Panasonic GX7's Micro Four Thirds lens mount might be unchanged, but there are a fair few tweaks to its focusing capabilities. As in the Panasonic G6 before it, the GX7's new image sensor and Venus Engine processor allow sensor data read out at a whopping 240 frames per second, and the lens drive mechanism can respond at the same rate, for faster contrast detection autofocusing.

You can still use the touch screen to indicate a subject for autofocus, and thanks to the proximity sensor in the new electronic viewfinder, the GX7 also offers Eye-Start AF that starts focusing as soon as you put your eye to the viewfinder.
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