zte imperial max reviews

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Didnt provide, we subbed in either camera fv-5 (android) or manual (ios). (And to be clear, were only testing the rear cameras on these phones. Sorry, selfie addicts. )weve been testing digital cameras for over a decade in our specialized image testing lab in cambridge, massachusetts.

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In our testing, we focus on five key metrics for still images: color accuracy, white balance accuracy, resolution, dynamic range, and low-light performance. for this roundup, weve put these seven phones through the ringer, taking thousands of images both in and out of the lab. All of the tests that we used for this roundup conform closely to our usual digital camera test procedures, with modifications made where necessary to suit the particulars of smartphone cameras.

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generally speaking, all of the smartphones we tested were able to render colors accurately under the right conditions. The nexus 6 (with the default google camera app) produced the most accurate colors, though it was followed closely by samsungs galaxy s6 edge and the panasonic cm1. The only phone that really struggled was the sony z3 compact, which produced images that were vivid, but also quite inaccurate.

of course, to get accurate colors you need accurate white balance. Ever walk inside and take a photo only to get a blue-tinted mess? Thats bad white balance.

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In our testing, we measure white balance accuracy under daylight (5500k), fluorescent (3500k), and incandescent (2800k) lighting. On average, color temperature errors of 300k or less are enough to earn a passing grade. while it doesnt have the most accurate colors, the best at white balance was actually the iphone 6, which was incredibly consistent across all lighting types with an average error of just 220k. The nexus 6 and the z3 compact followed close behind, with an average error of around 340k—but theres a catch. while both the samsung s6 edge and panasonic cm1 had average color temperature errors of over 500k, this is due to huge 1000k errors under incandescent lighting.

But this is an intentional choice most cameras make, since it preserves the warm look of indoor photos. Under daylight and fluorescents, the s6 and cm1 were just as good as the iphone 6, earning them runner-up status.

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whether youre shooting a portrait or a stunning sunset, you want to capture as much fine detail as possible. The best cameras and lenses resolve very fine detail, producing crisp, sharp photos.

In our labs, we test for sharpness with a specialized, backlit chart that lets us assess resolution in every area of an image. all seven test cameras did well at first glance, producing images that seem very sharp. But first glances dont tell the whole story: all of these cameras lean heavily on software enhancement to artificially sharpen their results. They do this by enhancing the contrast around objects, which tricks your eye into perceiving them as sharper.

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the technique works as long as you dont look too close, but it also muddies the waters. For example, the sony xperia z3 compact produces the sharpest shots in our test group, but only because of the absurd 41% oversharpening thats applied by default.

When you remove it from the equation, the z3 is revealed to be merely a middling performer in terms of resolving power. if youre shooting jpeg, youll get the best mix of legitimate sharpness and software enhancement from the google nexus 6 and samsung s6 edge, with the lg g4 and cm1 following close behind. These four produce images with the most realistic looking sharpness, while phones that overdo it (like the z3 compact) produce ugly haloing around high-contrast objects.

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The iphone 6 shows a lot of promise thanks to minimal edge enhancement, but the 8-megapixel sensor keeps it from rivaling the top performers. if you want to eliminate edge enhancement altogether, you can just take a raw photo (assuming youre not using the galaxy s6, z3 compact, or iphone 6, which dont offer raw capture).

Our raw sharpness results showed that the panasonic lumix cm1 was easily the best peformer, resolving about 30% more detail than its rivals. Thats no surprise, since most of the phones we tested use tiny sensors and plastic lenses, while the cm1 has an all-glass leica lens and comparably huge 1-inch sensor.

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dynamic range refers to the spread of bright and dark areas a camera can capture in a single photo, from the brightest highlights to deepest shadows. Its one of the traits that separates low-quality cameras that produce blown-out photos from high-quality dslrs and mirrorless models that offer rich, film-like tonality.

to test dynamic range, we shoot a backlit chart composed of 21 patches of varying brightness. Each patch is half as bright—or one stop dimmer—than the patch before it, meaning every photo has up to 20 stops of dynamic range. We count stops from pure white to pure black, until the patches are no longer visible or are overwhelmed by image noise. as we expected, raw-capable phones clearly stood above the rest in this test. Thats because jpeg compression usually involves raising contrast, which irreversibly destroys dynamic range in both highlights and shadows.

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Raw photos preserve all the data that the image sensor captures, which is clearly visible in the samples from the lg g4 (above). The first shot is a carefully edited raw with lots of rescued highlight detail, while the second—an unedited jpeg taken at the same time—is a shot id have tossed out immediately. in the raw-capable group, the best performer was the cm1, with a respectable 11. 7 stops of range—on par with some entry-level dslrs. The next best was the lg g4, with 10. 7 stops, followed by the htc one m9 (9. 7 stops) and nexus 6 (8. 77 stops, noise-limited).

In the jpeg division, the iphone preserved more range than the s6 edge, but without raw its impossible to know how their sensors truly compare. when you want to take a picture with a smartphone in dim light, you really only have two options: use a tripod and a slow shutter speed, or crank up the iso sensitivity.

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Bumping the iso is usually more convenient, but it also amplifies everything the camera is capturing—including image noise. This either gives you grainy pictures or, thanks to automatic noise reduction, muddy-looking details. to test how cameras perform in low light, we analyzed shots taken at iso 800 and 1600 (when available).

We looked at two key metrics: quantity of image noise and effect of noise reduction. Noise is easy to quantify, but noise reduction is trickier.

to nail it down, we use a custom spilled coins chart that, well. Looks like a bunch of multicolored coins scattered on a table. When cameras apply noise reduction to images of the spilled coins chart, it lowers the acutance (or perceived sharpness) of the image, which is something we can quantify. you can see the effect in the first set of samples above, which shows full-size crops from each smartphone taken at iso 800 (with the nikon d610 full-frame dslr as a control sample).

The effects of noise reduction are even more obvious at iso 1600 (below). the best overall performer was the panasonic cm1, which produced both low noise and minimal noise reduction