Phase One XF IQ4 150MP camera review

With 150 megapixels this medium format system camera will set you back over $50,000

Phase One XF IQ4
(Image: © Phase One)

Digital Camera World Verdict

The size, weight and autofocus system are limiting and the cost is incredible… but the quality of the results from the Phase One XF IQ4 150MP camera system is absolutely stunning.


  • +

    Astonishingly good images with heaps of detail

  • +

    Tank-like robustness

  • +

    Clear interface


  • -

    The autofocus is frustrating

  • -

    Slow start-up

  • -

    The $50,000 price!

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We tend to think that things move slowly in the medium format camera world but Phase One has been bucking that trend by introducing a succession of new backs for its XF camera that was introduced in 2015. The latest release is the IQ4 which is available in three variants, the 150MP, 100MP Trichromatic and 150MP Achromatic. We’re reviewing the 150MP camera system here.

The IQ4 150MP has a backside illuminated (BSI) design, which means the photoreceptors can make better use of the available light to generate an image signal. Naturally, with 150 million pixels at your disposal, low-light photography isn’t your first thought, however, the IQ4 has a sensitivity range of ISO 50-25,600. We’d probably draw the line at ISO 12,800 though.

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Angela Nicholson

Angela has been testing camera gear from all the major manufacturers since January 2004 and has been Amateur Photographer’s Technical Editor and Head of Testing for Future Publishing’s photography portfolio (Digital Camera MagazinePhotoPlus: The Canon MagazineN-PhotoPractical PhotoshopPhotography Week and Professional Photography magazines, as well as the Digital Camera World and TechRadar websites). She is the founder of SheClicks - a community group that encourages and supports female photographers.