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With its unusual form factor can the Tourbox aid the editing process? Will its price and variety of tactile controls appeal to photo and video editors who would like to streamline their workflow?
At a quick glance the Nokia Lumia 925's camera specification appears to be identical to its predecessor's, the Lumia 920, but if you look again you'll see that there are a few small but potentially important differences. The lens gains an extra element with a now 6-element design, a dual-LED flash element is added and the camera also gains an ISO 3200 setting. According to Nokia the image processing has also been significantly improved, to offer both improved detail in good light and better quality in low light. (We recently pitted all three Lumia 900 series models — the 920, 925 and 928 — against one another in our Nokia smartphone shootout.)
The Lumia 925 is PureView branded but doesn't use the Lumia 1020's large sensor and pixel-binning algorithms. Instead it features a conventional 8.7 MP CMOS sensor, a F2.0 lens and optical image stabilization. Its aluminum-edge body comes with a polycarbonate back and integrated antenna. On the front you'll find a piece of curved Gorilla Glass 2. At 4.5 inches the screen itself is the same size as that of the Lumia 920 and 1020. The device also features wireless charging (with an accessory cover) and LTE connectivity.
With the introduction of the Lumia 1020 and its large 1/1.5-inch 41MP sensor the Lumia 925 has lost its status as Nokia's flagship smartphone but given its street price is currently almost $250 lower than the 1020's it can still be a compelling device for the price-conscious mobile photographer. Read on to find out how it performed in DxO's comprehensive studio tests.
Nokia Lumia 925 headline specification:
With a DxOMark Mobile score of 73 the Nokia Lumia 925 finds itself on the 6th position on DxO's smartphone ranking. It scored just one point less than its bigger brother, the Lumia 1020, and is trailing four points behind the current top-rated camera phone, the Nokia 808.
The DxOMark team report that the Nokia Lumia 925 captures images with "good overall exposure" and that "in extreme low light conditions, exposure stays good when other camera phones fail". The image output shows "very low noise levels with no chroma component" and the flash performance is very good, with "good exposure, color, white balance, texture and noise".
On the downside: Images show "noticeable color shading with indoor lighting and sometimes outdoor, low-contrast details is badly preserved, especially in low light and in low light conditions, exposure time is too long which may cause motion blur." The 925 occasionally also struggles with white balance which "is sometimes blueish outdoors or with fluorescent lighting."
In video mode, DxOMark's engineers reported that the Nokia Lumia 925 offers "good texture reproduction" and that the "video stabilization is reliable in both bright and low light". On the downside there are "instabilities in white balance when changes occur in light conditions or scene content, unpleasant sudden corrections in video stabilization during walking motion and visible color fringing".
The DxOMark team found that the Nokia Lumia 925's images show "good overall exposure and -pleasant colors outdoors". "In extreme low light, the exposure stays good thanks to longer exposure time". However, there is also "strong color shading with some illuminants (e.g. fluorescent lightings), the white balance is sometimes blueish outdoors" and shows "some variation with indoor lighting".
Overall DxOMark awarded the Nokia Lumia 925 scores of:
*Color Shading is the nasty habit cellphone cameras have of rendering different areas of the frame with different color shifts, resulting in pictures with, for example, pinkish centers and greenish corners.
DxOMark's engineers reported that the Nokia Lumia 925 image output shows "very low noise levels, even in low light conditions, thanks to longer exposure time and no chroma noise". On the other hand "low-contrast detail is badly preserved, especially in low light and in low light conditions, exposure time is too long (1/4s compared to 1/15s for other camera phones at 10 lux), which can cause motion blur".
Texture Acutance is a way of measuring the ability of a camera to capture images that preserve fine details, particularly the kind of low contrast detail (textures such as fine foliage, hair, fur) that can be blurred away by noise reduction or obliterated by excessive sharpening.
Sharpness is an important part of the quality of an image, but while it is easy to look at an image and decide visually whether it's sharp or not, the objective measurement of sharpness is less straightforward.
An image can be defined as "sharp" if its edges are sharp and if fine details are visible, but in-camera processing means it's possible to have one of these (sharp edges) but not the other (fine details). Conventional MTF measurements tell us how sharp an edge is, but have drawbacks when it comes to measuring fine detail preservation. Image processing algorithms can detect edges and enhance their sharpness, but they can also find homogeneous areas and smooth them out to reduce noise.
Texture Acutance, on the other hand, can qualify sharpness in terms of preservation of fine details, without being fooled by edge enhancement algorithms.
At first sight, the images from these two cameras may appear equally sharp. A sharpness measurement on edges will indeed confirm this impression, and will even show that the second camera is sharper. But a closer examination of low contrasted textures shows that the first camera has a better preservation of fine details than the second. The purpose of the Texture Acutance measurement is to qualify this difference.
Visual Noise is a value designed to assess the noise in an image as perceived by the human visual system, depending on the viewing condition (size of image, size of screen or print, viewing distance). The measurements have no units and can be simply viewed as a weighted average of noise standard deviation for each channel in the CIE L*a*b* color space. The lower the measurement, the less noise in the image.
Phone cameras, like entry-level compact cameras, tend to suffer from artifacts such as sharpening halos, color fringing, vignetting (shading) and distortion, which can impact on the visual appeal of the end result. DxOMark engineers measure and analyse a range of artifacts. Their findings after testing the Nokia Lumia 925 are shown below:
DxOMark also tests autofocus accuracy and reliability by measuring how much the accutance -- sharpness -- varies with each shot over a series of 30 exposures (defocusing then using the autofocus for each one). As with other tests these results are dependant on the viewing conditions (a little bit out of focus matters a lot less with a small web image than a full 8MP shot viewed at 100%). The overall score for the 925 is 79/100 in bright light and 65/100 in low light.
DxOMark scored the Nokia Lumia 925 72/100 overall for its flash performance, deducting points for strong corner shading.
DxOMark engineers put phone cameras through a similarly grueling set of video tests, and you can read their full findings on the DxOMark website here. We'll simply summarize for you. DxOMark found the Nokia Lumia 925 to produce good texture and offer efficient image stabilization in video mode. However, the white balance can be unreliable when the light changes, the OIS can overcorrect when walking while recording and there is some visible color fringing in the video footage.
After the launch of the Lumia 1020 the 925 might not be Nokia's flagship smartphone anymore but at an almost $250 USD savings compared to the 1020 means it can still be a great alternative for cash-conscious mobile photographers.
The Nokia Lumia 925 captures images with good exposure, even in very low light, and low noise levels across the ISO range. Flash performance is also very good.
On the downside images can show color casts under artificial light and low-contrast detail is lost through noise reduction, even in bright light. Extremely slow shutter speeds in low light also increase the risk of image blur through camera shake.
In video mode the Lumia 925 captures good detail and offers very efficient image stabilization but the white balance can struggle when light conditions change, there is visible color fringing and the OIS has a tendency to overcorrect when you walk while recording a video. For a more detailed analysis, visit www.dxomark.com.
What’s the best camera for under $2000? These capable cameras costing less than $2000 should be solid and well-built, have both speed and focus for capturing fast action and offer professional-level image quality. In this buying guide we’ve rounded up all the current interchangeable lens cameras costing under $2000 and recommended the best.
What’s the best camera costing over $2000? The best high-end camera costing more than $2000 should have plenty of resolution, exceptional build quality, good 4K video capture and top-notch autofocus for advanced and professional users. In this buying guide we’ve rounded up all the current interchangeable lens cameras costing over $2000 and recommended the best.
We've updated our 'best cameras over $2000' buying guide, and the Sony a7R IV is now our favorite mirrorless camera in the $2000-4000 price range. It sits alongside the Nikon D850, which is our choice for those who prefer DSLRs.
If you're looking for a high-quality camera, you don't need to spend a ton of cash, nor do you need to buy the latest and greatest new product on the market. In our latest buying guide we've selected some cameras that might be a bit older but still offer a lot of bang for the buck.
What's the best camera for shooting sports and action? Fast continuous shooting, reliable autofocus and great battery life are just three of the most important factors. In this buying guide we've rounded-up several great cameras for shooting sports and action, and recommended the best.
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from My Best Picture of the Week
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from The Floor
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from Emotional Pain
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from Story of the moment
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A new Kickstarter campaign, Photography Deck, may be the next item you want to add to your camera bag. The standard-size deck of playing cards features unique photography-oriented artwork and act as cheat sheets for photographers.
The Sony ZV-1 and Panasonic Lumix DC-G100 are the first cameras we've seen that are overtly designed with vlogging in mind – and the changes they represent could have implications for the future of all cameras.
The utility allows the E-M1X, E-M1, E-M1 Mark II, E-M1 Mark III and E-M5 Mark II cameras to be used with video conferencing apps over USB.
Olympus is showing final images of its under-development 150-400mm F4.5, which it says will arrive this winter. An unspecified macro and 8-25mm F4 Pro have also been added to the lens roadmap, and the E-M1X's AF gains bird detection.
The scam, which involves sending fake copyright violation notices, has been circulating on the social media platform since at least June 9.
Fujifilm is one of just two producers of tape media (the other being Sony) and it is hard at work on a breakthrough that will allow single tape storage drives to offer 400TB capacities in the coming years.
The National Parks Service says it's investigating the incident, which took place just two days after the park opened following a shutdown due to the COVID-19 pandemic.
Professional full frame lenses are usually large and have fast apertures. In this episode of DPReview TV, Chris and Jordan argue that there's a need for slow professional lenses – inspired by some of their favorite Micro Four Thirds lenses.
The camera maker joins Olympus, Fujifilm and others is a legal tussle over US digital camera technology patents held by DigiMedia Tech.
NASA's Solar Dynamics Observatory (SDO) photographs the sun every 0.75 seconds. In its first decade in space, the SDO has captured more than 425 million images of the sun. NASA has compiled these images into an amazing time lapse, come check it out.
The lens is available for Leica M, Sony FE, Nikon Z and L-mount camera systems, and now holds the title as the world's widest rectilinear lens for full-frame camera systems.
Tamron's new 28-200mm F2.8-5.6 is a versatile zoom lens for Sony E-mount. Well-suited for travel photography, it's compact, lightweight, and fast/quiet to focus.
Fujifilm has announced that its GF 30mm F3.5 R WR wide-angle lens for its medium format cameras will ship in late July or early August.
Fujifilm's latest lens is a sharp, reasonably compact and well-built wide-angle for the company's GFX medium-format cameras. We took it out and about in the warm Seattle summer with the company's 50 and 100 Megapixel camera bodies to see what it can do.
Fujifilm has issued firmware updates to the GFX 100 and GFX 50 models, with the 100MP camera gaining the most significant improvements.
Although the channel is still growing, it currently has nine videos that offer concise overviews of just a few of the cameras Japan Camera Hunter founder Bellamy Hunt has sitting around his Japanese storefront.
ON1 has launched ON1 360, the latest version of ON1 Photo RAW 2020 with ON1's new Photo Mobile application for iOS, iPadOS and Android mobile devices. The new solution syncs raw processing between your mobile device and computer.
Switching screw-on filters between lenses of different thread sizes is much quicker with the Revoring adjustable step-up ring. It uses a sprung iris that expands to fit a range of filter thread sizes, so a single filter can be used on multiple lenses
That's right folks, you heard it here first. Read on for the full interview, with Kenji Tanaka of Sony.
Kodak's discontinued Aerochrome film gets a digital remake in the form of a new Lightroom preset pack from film emulation specialists Really Nice Images.
We've updated our Best cameras under $2000 buying guide, and the Fujifilm X-T4 is our top pick for those seeking a camera that excels and both stills and video shooting.
Chris and Jordan didn't forget about stills when they previewed the video-centric Panasonic G100 earlier this week.
The Canon EF-M 11-22mm F4-5.6 is by no means a new lens, but it's one we've been shooting with over the years, and appreciate for its compact form, solid build and useful wide-angle range.
Mauritius is a remote island off the southeastern coast of the African continent that's never had Google Street View. So, an island resident, Reuben Pillay, decided to use his own DJI Phantom 4 Pro drone to create more than 220 high-resolution 360-degree images of the island.
Pye Jirsa explains how blowing out the highlights in an image — usually a no-no in the world of photography — can result in a 'perfectly imperfect' photo that feels more authentic and natural.
Here's a fresh take on a classic debate, or why both film and digital are awesome.
A recent copyright infringement lawsuit against Newsweek, as well as Facebook's subsequent statement about its sublicensing terms, prompted the judge to reopen the case against Mashable.
Sigma's fp full-frame mirrorless camera is now able to output a 4K raw stream that can be captured as ProRes Raw by an Atomos Ninja V or Blackmagic Raw on the Blackmagic Video Assist 12G, as part of a major update.
DPR readers submitted more than 250 photos taken with the Samsung Galaxy S20, S20+ or S20 Ultra. Here are some of our favorites.
Coffee expert and 2007 World Barista Champion James Hoffmann recently took to YouTube to share his experience developing film with coffee using a rather robust Caffenol recipe.