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Samsung Galaxy K Zoom review: Half phone, half camera -- and not brilliant at either

Samsung's new cameraphone packs a 10x optical zoom lens, a 20-megapixel sensor and Android KitKat into a chunky body.

Andrew Lanxon Editor At Large, Lead Photographer, Europe
Andrew is CNET's go-to guy for product coverage and lead photographer for Europe. When not testing the latest phones, he can normally be found with his camera in hand, behind his drums or eating his stash of home-cooked food. Sometimes all at once.
Expertise Smartphones, Photography, iOS, Android, gaming, outdoor pursuits Credentials
  • Shortlisted for British Photography Awards 2022, Commended in Landscape Photographer of the Year 2022
Andrew Lanxon
9 min read

Smartphone cameras have come on in leaps and bounds. Gone are the days of blurry, low-resolution shots of your dog -- phones are now able to capture shots that you'd struggle to tell weren't taken on a dSLR.


Samsung Galaxy K Zoom

The Good

The Samsung Galaxy K Zoom's impressive 10x optical zoom gets you up close with your subject without losing image quality. It has plenty of power for most tasks and it has the latest Android software too.

The Bad

It's bulky and heavy, making it awkward for everyday use, while its overall image quality doesn't particularly impress and it has a disappointingly low resolution display.

The Bottom Line

If you absolutely must have a phone with an optical zoom, the K Zoom is basically your only option. It's bulky though, and the pictures it takes aren't any better than the Galaxy S5's. You'll be far better off with a cheap Android phone and a decent compact digital camera.

The one thing most phones still fall down on, however, is zoom. Digital zoom is the standard, which simply means it enlarges the image artificially, cropping into what's already been captured and dramatically losing quality. Not so with the Galaxy K Zoom. This 4.8-inch Android phone comes with an impressive 10x optical zoom lens stuck on the back, rather like last year's Galaxy S4 Zoom .

Inside it is a 20.7-megapixel image sensor, along with optical image stabilisation for steady, blur-free shots even at full zoom. Combine that with its six-core processor, Android KitKat software and Galaxy stylings and you may be looking at the shutterbug's dream phone. Less impressive, however, is its chunky proportions and its 720p display.

The phone is on sale now in the UK for £400 off-contract, directly from Samsung's online store, and for AU$749 in Australia. Samsung has said the K Zoom will not be released in the US, but for the purposes of comparison, a rough conversion (after subtracting sales tax) would be $560.

Design and display

The K Zoom can be mistaken for two completely different products, depending on which side you look at. From the front (and by "front", I mean the screen that faces you), it looks exactly like any other Samsung Galaxy phone. The white body has a silver edge, with the usual physical home button on the bottom and the chrome-effect speaker grille at the top. If you've laid eyes on any of Samsung's phones from the past few years, the design will be immediately familiar.

Andrew Hoyle/CNET

Turn it around and it becomes a camera, with almost no hint as to its smartphone skills. The large, bulging circle that is the optical zoom, along with the wide flash makes it look pretty much like any other compact camera. The design has been tweaked from its predecessor, the S4 Zoom, and I'm rather glad. Gone is the unpleasant bulging battery grip and the shiny plastic body, which made it very awkward to hold. Instead, the battery is incorporated into the whole body and it has a similar dotted finish on the back to the Galaxy S5 . It feels like a normal phone when you hold it up to make a call.

The bulge may have gone, but it's still far from small. The body is 20mm thick at its fattest point, which you'll certainly notice if you're trying to cram it into your skinny jeans. It weighs a hefty 200g, making it a more cumbersome beast than the S5, which was 145g and 8.1mm thick. If you're already used to carrying your camera in a separate bag, its size won't be an issue for you. Its bulky proportions do make it more unwieldy as an everyday phone, however.

A couple of other notable changes from its predecessor is the smaller shutter button on the edge and the removal of the tripod screw mount on the bottom. The latter is a blow, as it means you'll need a smartphone clamp for your tripod if you want to do longer-exposure low-light shots. The zoom ring has been removed from the front as well. The zoom is now operated by the volume up and down buttons. It's less awkward to zoom, but the motors still take around 4 seconds to zoom in completely, which is quite slow.

Andrew Hoyle/CNET

The K Zoom has a 4.8-inch display, which is plenty of room to properly frame your shots and poke around at the various on-screen camera settings. Samsung has given it an unimpressive 1,280x720-pixel resolution, which gives you a pixel density of 305 pixels per inch. That's a big step below the 431ppi of the Galaxy S5 and it shows -- icon edges and small text don't have the same clarity to them on the K Zoom that they do on the S5.

I find Samsung's choice of display somewhat baffling. High resolution displays are particularly useful when it comes to viewing images, as the extra pixels help make everything look much sharper. Given the K Zoom is designed with imaging as its chief concern, it would make a lot more sense to slap in a full HD 1080p display. It's bright at least (I found it easy to see under strong sunlight) and bold enough to do justice to Instagram.

The phone comes with 8GB of built-in storage as standard which is enough room to get you started. Once you start snapping hundreds of high-resolution photos and shooting reams of video, you'll quickly find the space running out. Luckily there's a microSD card slot on the side, so you can expand its storage when you need to.

The K Zoom as a camera

The K Zoom has some impressive photography credentials. At its heart is a 20.7-megapixel backside-illuminated CMOS sensor that's physically larger than the one in the Galaxy S5. A larger sensor means more light can hit it, which should result in nicer photos overall -- at least, that's the theory.

The K Zoom's trump card is the 10x optical zoom. If you're not sure why optical zoom is important, let me explain: digital zoom like you find on the S5 "zooms in" on an image by simply cropping into it, artificially making an area larger. It therefore fails to capture a lot of detail. Optical zoom, however, uses moving lenses to zoom in, as you would with a magnifying glass. It captures the zoomed-in image using all of the sensor, therefore maintaining image quality.

Andrew Hoyle/CNET

The zoom on the K is the equivalent of having a 240mm telephoto lens on the front of your phone. It allows you to shoot small details on objects from a distance -- if you're off to Africa to see the lions, this may come in handy if you don't fancy losing a limb or two. It has optical image stabilisation on board too, so even at maximum zoom, it's not difficult to keep the shot steady and blur-free.

Shooting on the phone is as straightforward as it is on any other phone. Fire the camera up, whack it in Auto mode and off you go. There are a whole load of scene modes to choose from, including such standards as panorama, burst and HDR. It doesn't have the same always-on HDR as the S5 -- it instead takes multiple pictures in a quick burst and combines them in-camera, which takes slightly longer.

All shots actually take rather longer on the K Zoom than they do on the S5. The auto-focus isn't as fast and processing each image takes longer, meaning it has a shot-to-shot time of around 2 seconds, which isn't brilliant. Using scene modes like HDR requires a longer wait while it processes each shot.

Image quality

Given that the K Zoom has a larger, higher-resolution image sensor than the S5, you'd imagine it would have the flagship phone beaten hands down when it comes to photo quality. In my tests, however, I didn't find that to be the case.

Samsung Galaxy K Zoom camera test Andrew Hoyle/CNET

Samsung Galaxy S5 camera comparison Andrew Hoyle/CNET

On my first shot of St Paul's, the exposure is good, with plenty of detail in the shadows and no washed-out clouds. The auto white balance hasn't done well at all however, making the shot look extremely cold. There's plenty of detail on St Paul's in the middle, but towards the edges -- particularly on the buildings on the left -- there's much less detail, looking almost blurred. The Galaxy S5, by comparison, had more natural colour tones.

Samsung Galaxy K Zoom camera test Andrew Hoyle/CNET

Samsung Galaxy S5 camera comparison Andrew Hoyle/CNET

With HDR mode enabled, the K Zoom achieved a much warmer shot.

Samsung Galaxy K Zoom camera test Andrew Hoyle/CNET

Samsung Galaxy S5 camera comparison Andrew Hoyle/CNET

It's the zoom lens that really sets the K Zoom apart. Zooming in on the roof of St Paul's, the K's shot is far more detailed than the S5's, which has had to crop in to its sensor, reducing the quality of the image.

Samsung Galaxy K Zoom camera test Andrew Hoyle/CNET

That zoom also means you can spy on passing wildlife. Coo!

Samsung Galaxy K Zoom camera test Andrew Hoyle/CNET

Samsung Galaxy S5 camera comparison Andrew Hoyle/CNET

Neither camera exactly impressed me with their attempts at capturing Tower Bridge. The scenes were generally rather dark, although the S5 again had a slightly more pleasant colour tone.

Samsung Galaxy K Zoom HDR camera test Andrew Hoyle/CNET

Samsung Galaxy S5 HDR camera comparison Andrew Hoyle/CNET

With HDR turned on it was a different matter entirely. The K Zoom's shot had warmer, more natural colours and had more detail on the bridge itself.

Samsung Galaxy K Zoom camera test Andrew Hoyle/CNET

Samsung Galaxy S5 camera comparison Andrew Hoyle/CNET

The photos of this plant were a bit of a mixed bag. While the S5's shot again had warmer colours, it was a little blurred. The K Zoom's -- thanks to its stabilisation -- was pin-sharp.

Samsung Galaxy K Zoom camera test Andrew Hoyle/CNET

Samsung Galaxy S5 camera comparison Andrew Hoyle/CNET

The bright colours of these Shakespeare posters outside of the Globe Theatre look extremely vivid on the Galaxy S5, but seem rather more muted on the K Zoom.

Samsung Galaxy K Zoom camera test Andrew Hoyle/CNET

Samsung Galaxy S5 camera comparison Andrew Hoyle/CNET

Both phones captured this veg stall in Borough Market adequately, but again the S5's shot was more vivid and had better contrast, giving the image more pop overall.

Samsung Galaxy K Zoom camera test Andrew Hoyle/CNET

Wandering over to West London's Syon Park, the K Zoom captured a good overall picture, with even exposure between the bright sky and shadowy trees.

Samsung Galaxy K Zoom camera test Andrew Hoyle/CNET

A macro mode allows the phone to focus quite close up -- in this case, allowing me to snap this bee on a flower. Lovely stuff.

The K Zoom as a phone

Camera hardware aside, the K Zoom operates in precisely the same way as Samsung's other phones. It runs the latest Android 4.4.2 KitKat software at its heart, over which Samsung has pasted its TouchWiz interface. It looks the same as it does on the S5, with multiple home screens to fill up with apps and widgets and an app tray for any icons you don't want cluttering up your home panels.

Andrew Hoyle/CNET

You'll find a whole host of bundled Samsung software, including the S Planner calendar, S Voice speech control, a dedicated Samsung app store and the My Magazine app, which sits off to the left of the homescreens. It combines various news sources and social networks into a scrolling feed -- it's basically Flipboard.

The K Zoom doesn't come with S Health, however, and there's no pedometer or heart rate monitor for you fitness buffs.

It's powered by a combination of a 1.3GHz quad-core processor and a 1.7GHz dual-core processor -- that's six processing cores in total. It doesn't use all six at once though, instead using the quad-core side for the heavy lifting, switching to the lower-powered dual-core chip for less intense times to try and eke out more battery life.

Andrew Hoyle/CNET

I found the phone to be satisfyingly swift. There's no indication as to which processor it's using at any point, but that doesn't matter. Swiping around the homescreens was lag-free, and opening menus and apps didn't result in much delay. Demanding games such as Asphalt 8 and Riptide GP 2 played with high frame rates for smooth gameplay. Photo editing, I'm glad to say, was also tackled without hesitation.


Stuffed into that flabby body is a 2,430mAh battery. That's a reasonable size cell, but it will need to be fairly burly to keep on going when you're getting snap-happy on holiday. I'm still putting the battery through numerous test runs to see just how the six-core processor handles battery, but anecdotally, I can say that battery life seems at least adequate.

I was able to spend a good couple of hours around London, taking almost 100 test photos on various modes, while tethered over Wi-Fi to my 4G phone to post some pictures to Facebook and Twitter. From a full charge, the battery only dropped to around the 85 percent mark, which isn't too bad.

If you're aggressive with your usage, with screen brightness on max, GPS and Bluetooth switched on and apps like Spotify running in the background, you'll find your battery will drain much faster. Using the xenon flash drains the juice quickly too.

If you're more careful you shouldn't struggle to get a day out of it. As a general rule, you should expect to charge the K Zoom, like all smartphones, every night.


The phone-camera hybrid that is the Galaxy K Zoom may seem like the photography enthusiast's dream device, but it's far from perfect. Its bulky size means it's impractical for everyday use, and its images, while far from poor, don't match the Galaxy S5's. Nor does the camera's speed, or the display resolution.

Unless you absolutely need an optical zoom on your phone -- and I'm not sure why you would -- you'd be better off plumping for the more pocketable Galaxy S5.

Alternatively, opt for a great budget Android phone like the Motorola Moto G and spend the rest of the money on a compact digital camera for your holidays.


Samsung Galaxy K Zoom

Score Breakdown

Design 6Features 8Performance 7