Digital Photo Help


Moment filter mount lets you add 62mm filters to its iPhone lenses

by on Jan.05, 2018, under Reviews

With its beautifully-manufactured metal lenses, Moment has firmly established itself in the ‘high-end’ bracket of the market for iPhone accessory lenses. And now, the US-brand is taking it to the next level by launching an accessory that’ll make its products even more attractive to anyone who takes their iphoneography seriously: a 62mm filter mount.

Thanks to two rubber collars that are included in the package, the mount is compatible with all Moment lenses. One collar has been specifically designed to hold the wide angle lens, while the other works with all other lenses in the Moment line-up. Your filters screw into a metal filter adapter ring, which slides onto the rubber collar. The latter then firmly attaches to your lens.

The kit allows you to attach any filter with a 62mm thread, and it should also be possible to attach larger filters using a step-up ring. So if you are a little tired of using your photo app’s built-in software filters, nothing is stopping you from using proper polarizers, neutral density, color, or any other kind of filter on your iPhone camera.

You can currently preorder the filter adapter kit for $40. More information is available on the Moment website.

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This 'metalens' breakthrough may revolutionize lenses as we know them

by on Jan.04, 2018, under Reviews

Image credit: Jared Sisler/Harvard SEAS

Until recently, metalenses—flat ‘lenses’ that can focus light using nanopillars on their surface—were a cool-but-limited area of study when it came to photography. Sure, these flat lenses are 100,000x thinner than glass, but they could only work with a limited range of colors, making it unlikely they’d appear in a cameras module any time soon.

That all changed this week, however, when a team at the Harvard John A. Paulson School of Engineering and Applied Sciences (SEAS) announced that they had succeeded in developing the first metalens that can focus the entire spectrum of visible light, including white light, onto a single point in high resolution.

This is a huge breakthrough, and a big leap forward from the same teams’ announcement last February that they had managed to focus all the colors from blue to green.

Image credit: Jared Sisler/Harvard SEAS

The research was published in the journal Nature Nanotechnolgy, where the team describes a metalens that uses “an arrays of titanium dioxide nanofins to equally focus wavelengths of light and eliminate chromatic aberration.” In other words: where a traditional lens needs multiple curved glass elements of varying thicknesses to focus the entire spectrum of visible light onto a single point, this flat metalens does the exact same thing using nano structures.

The details of how this is achieved can get a bit complicated—involving how they pair and space the ‘nanofins’ on the metalens itself—but the result is easy enough to understand: an achromatic flat lens that comes with three very big advantages over traditional glass lenses, as the paper’s lead author Federico Capasso explains:

Metalenses are thin, easy to fabricate and cost effective. This breakthrough extends those advantages across the whole visible range of light. This is the next big step.

The next step for the SEAS team is to make the lens bigger; they’re aiming for 1cm in diameter. In the meantime, Harvard has already licensed the tech to a startup for commercial development, so a real-world product that uses these metalenses might not be as far off as you might imagine.

To learn more, or dive into the research paper itself, head over to the SEAS website or read the full paper in Nature Nanotechnology.

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A letter from the Publisher

by on Jan.03, 2018, under Reviews

The first week of a new year is an important time for every business, and DPReview is no different. As we reflect on the past year and define our goals for 2018, I want to take this opportunity to introduce myself. Some of you might know me from occasional forum posts and comments—usually to explain a new site feature, or some new style of advert. My name is Scott Everett, and I’m DPReview’s new General Manager and Publisher, replacing Simon Joinson, who stepped down in October.

At its core, DPReview is a group of people. Those people are dedicated to investigating all of the latest developments in photographic imaging technology, and providing informed, unbiased analysis to our readers. We’ve been doing this in one way or another for almost 20 years; I joined DPReview in 2011, which feels like a long time ago, especially in such a fast-paced industry, but the site’s essential mission hasn’t changed in that time.

We are, of course, also a business. Traditionally, like most websites, DPReview has generated the majority of its income via conventional ‘banner’ advertising. But as advertisers increasingly move away from conventional ads and seek to position different types of content in as many channels as they can, we’ve faced an important question: how can we meet the needs of our advertisers while maintaining the trust of our readers?

Regular site visitors will have seen new kinds of content appearing on DPReview over the past couple of years—from long-form videos to occasional co-branded articles. Most of it has proven popular with our readers (thanks as always for the feedback), but we’re not going to rest on our laurels. And we are most definitely not going to compromise the high editorial standards that brought you here in the first place.

Simon Joinson, Barney Britton, and Allison Johnson listen politely as I attempt to explain something.

You’ll see some changes on the site in 2018 and beyond. We are in the middle of automating many of the tests we perform on cameras and lenses (yes, we plan to bring back lens reviews), which we hope will increase the consistency of our product reviews, and hopefully decrease the amount of time that some of them take. We are also working hard to re-think the user experience of the site on both desktop and—perhaps more importantly—mobile.

In an era when countless blogs offer up half-baked opinions on new products within minutes of their launch, DPReview with our labor-intensive method of testing might seem like something of a dinosaur. But we’re OK with that.

While both the photography and publishing worlds have changed drastically since I bought my first digital camera (an Olympus E-1, if you were curious), DPReview in 2018 is what it always was: a website run by and for discerning photography and technology enthusiasts. And our readers are our most valuable asset. This site would not be what it is without the community of photographers that visit every day.

So hello, thank you for your support, and Happy New Year!

Scott Everett, Publisher and General Manager,

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