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Phase One and the Pursuit of High-Resolution Imaging
151 megapixels, a sensor larger than anything in a mirrorless body, and a camera built for studios rather than streets. Inside the Danish company's uncompromising vision.
Phase One (via FoneArena)
At Photokina 2018, Phase One announced a camera system priced at $51,990 that included the XF camera body, a prism finder, a Blue Ring prime lens of the buyer's choice, a five-year warranty and a five-year uptime guarantee. The price was not the story. The story was the digital back at its heart: the IQ4 150MP, with 151 million pixels on a backside-illuminated CMOS sensor measuring 53.4 by 40 millimeters, roughly two and a half times the area of a 35mm full-frame sensor, in what Phase One calls full-frame medium format.
The specifications still read like a wish list. Active pixels of 14,204 by 10,652. Sensitivity from ISO 50 to 25,600 with 15 stops of dynamic range and 16-bit raw files. Storage across XQD, CFexpress and SD media. Tethering over Ethernet, USB-C and wireless, with Capture One raw processing running inside the camera itself on the company's Infinity Platform, an architecture Phase One described as designed to be upgradable over time. It launched alongside two siblings: the IQ4 150MP Achromatic, a monochrome version reaching ISO 200 to 102,400 at $54,990, and the IQ4 100MP Trichromatic at $47,990.
Beyond the studio
Phase One's pursuit of resolution was never confined to the studio. In September 2019 the company unveiled the XT, a modular field camera combining any IQ4 back with a dedicated compact body and lenses built by the German manufacturer Rodenstock. The three launch optics, the HR Digaron-S 23mm f/5.6, 32mm f/4 and 70mm f/5.6, carry an electromagnetic X-Shutter adapted from Phase One's industrial line, and the body offers 24 millimeters of shift on both axes for perspective correction and stitched panoramas. A fully equipped XT system was priced at $56,990.
The industrial division pushes further still. The iXM-RS150F is a 150-megapixel metric camera for aerial survey, and the company has fielded a 280-megapixel dual-lens aerial system with GNSS positioning. An earlier iXM 100MP drone camera, the first to use a backside-illuminated medium-format sensor in the air, was priced at $40,000 before lenses. Few photographers will ever need this equipment. That is rather the point: Phase One operates where resolution is the entire job description, in cultural heritage digitization, aerial mapping and high-end commercial work, and builds without the compromises that consumer cameras must make.
The result is a company that looks increasingly singular. As the mainstream chases speed and computational tricks, Phase One continues to bet that there is no substitute for a very large sensor gathering a very large amount of light, and nearly a decade after the IQ4, nobody has taken that bet away from them.
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