Transform Your Smartphone Camera Into a Professional Light Meter
The Diffuser & Cosine Corrector accessory enables your smartphone to measure light at top-level accuracy without any compromises.
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One Accessory, Many Benefits
Best-In-Class Accuracy
Forget flimsy, inaccurate light meters. With the diffuser attachment, you'll get professional-grade measurement accuracy from your smartphone. Rivaling expensive hardware meters at a fraction of the cost.
Excellent Cosine Correction
The accessory's sophisticated design provides your smartphone light meter with an ideal directional response. This leads to accurate measurement results in real-world scenarios where light strikes from different directions.
Premium Quality
The Diffuser & Cosine Corrector accessory was developed and tested in a Swiss optics laboratory. Every piece shipped is hand-assembled and has passed strict quality control.
What You Get
With the Lightray Diffuser & Cosine Corrector accessory, you'll get a clip-on diffuser that attaches on your device's front camera. It is tested and designed to work with every iPhone, iPad, and many Android devices.
How It Works
The semi-transparent white disc at the heart of the accessory is a perfect diffuser. It consists of a microscopically rough surface, created by fine particles and structures embedded in the material. As light enters the diffuser, it's scattered in many directions resulting in a uniform glow exiting the diffuser. This allows your device to take an accurate light measurement using the camera as a light sensor.
Even further, the mechanical assembly allows the accessory to act as a Cosine Corrector, enabling light to hit from any direction without causing measurement errors.
Developed and perfected by a team of Swiss optics experts and researchers at Zurich University of Applied Sciences, the Diffuser & Cosine Corrector accessory provides you with professional-grade results. It was rigorously tested in an optical laboratory with a wide number of devices to perfect a smartphone's light measurement capabilities.
Combined with one of our apps it meets international light measurement standards as described in ISO/CIE 19476. Every piece manufactured is assembled by hand and is required to pass a strict quality control. Our technology is patent pending under US 63/463,568 and US 18/820,817.
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Introductory Price
🇺🇸 Important for US Customers Only 🇺🇸
DHL has unexpectedly suspended all commercial deliveries to the USA (more info). Unfortunately, this means we cannot ship your order at the moment. We will resume processing as soon as the situation is resolved.
In addition, starting August 29, new US tax regulations may impose a 39% tariff on products made in Switzerland (source). It is still uncertain if or how these tariffs will be applied. Please note that we cannot cover any additional costs — orders are placed at your own risk.
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Worldwide shipping and tax included*
Compatible with your **
* We ship with DHL Kleinpaket International Premium and cover all taxes and duties in most countries. Check for details here.
** Compatible with all newer iPhones and iPads, and many common Android devices. See all compatible devices here.