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Phase One IQ4
150MP Review

Basic Specifications

Full model name:

Phase One XF IQ4 150MP


150 Megapixels

Sensor size:

50mm (53.4mm x 40.0mm)

Kit Lens:



Electronic/ LCD

Native ISO:

Estimated 85 - 160, 000

Extended ISO:

Estimated 35 – 256, 000


60 minutes - 1/4000


152 x 135 x 160 mm






Phase One

Full specs:

Phase One IQ4 Specifications

About Phase One XF IQ4 150

The Phase One XF modular system has massive appeal for professional commercial photographers. The separate components allow you to build your camera exactly as you like and the IQ4 is the next step in that. With three models available, the Phase One 150 comes in both monochrome (for black and white) and a full-color version. A new autofocus system and the fastest software that the company offers accompany a robust medium frame body that is solid in hand. This uses the new Honeybee Autofocus platform, IQ3 Back which offers up to 60-minute exposures, a new modular viewfinder with a 90-degree view, and a user upgradable UI. This is 20 years of Phase One design updated, and just about everything has been tinkered with, there are even several new lenses anticipated for the over 100MP range that Phase One produces. The DF+, the previous model of this, will shortly be discontinued meaning that the IQ system will wholly replace it. This is a much blockier system and looks less like a DSLR than the DF+ did.

Just to clear up any confusion – the IQ 4 is specifically the modular system attached to the back of the XF camera system. This is what makes it so compatible! It does, however, have to be edited using proprietary Capture One Pro. However, a subscription is included with purchase.

Features – Phase one IQ4 XF 150

  • 150MP 50mm CMOS (BSI) Sensor
  • 60 minutes long exposure
  • QXD and SD storage
  • Ethernet, USB-C and Wireless tethering options
  • 3.2” touch display
  • XF powershare for easy uploading
  • Optional waist-level viewfinder attachment
  • HAP-2 1MP CMOS Sensor with floating point architecture autofocus system with focus assist
  • Interchangeable focusing screens
  • Profoto Air TTL built it
  • USB Chargeable
  • Sensor Cleaning kit, Gray Card and Calibration kit included
  • 20m wireless trigger range
  • Up to 6 groups of flashes using Profoto AirTTL system
  • IQ2 and three units can be used with the XF body with a firmware upgrade

What’s New

  • Laptop Hood system so that the case can also be used as an editing station on location.
  • The autofocus system is much better than previous models, though it still uses the same single central focus point.
  • Touch screen activated controls on the top of the body. These are in addition to traditional dials on the body.
  • Multiple customizable buttons on the body.
  • Shoot in live view mode
  • Body battery can also run the digital back at the same time if the battery in the digital back is drained.
  • Built-in Profoto trigger
  • Focus stacking built-in and several other modes like time-lapse (12k!).
  • Built-in seismograph, so the shutter isn’t released until the camera is perfectly still
  • 16 Bit, 15 stops dynamic range, 120mb per image

Who Should Buy

The Phase One IQ4 XF 150 is aimed squarely at professionals who do commercial photography. If it weren’t for the already prohibitive price tag the fact that everything in the modular system is designed to integrate with a lot of techs would show you that this isn’t a camera you just buy and click. If you’re not going to be using that level of tech, then there simply isn’t a need to spend this kind of money. While the outdoor images are stunning the level of compatibility with the Profoto system and the multiple methods of tethering means that it’s very much catering to studio shooters who want to shoot everything integrated and transfer immediately. For the average pro, a DSLR or similar full-frame model is more than capable; this is high end.

How to Use – Get, Set, and Click

  • 1Turn the camera system on and set/select your custom buttons. Since you’re going to be setting your personal choices for shutter and for autofocus, this will be different for everyone. For those who waist shoot one of the front buttons may be a better shutter, while those looking through the viewfinder may prefer a more traditional shutter and the front for autofocus.
  • 2
    Press your autofocus button to focus the camera as normal.
  • 3
    Click the shutter.
  • 4
    Done! This system is amazingly simple to use once you’ve set up your custom buttons.

Must-Have Accessories for

Phase one Waist Level Viewfinder
Phase one Waist Level Viewfinder
  • Body mounted the modular viewfinder
  • Viewfinder at 90 degrees. Also uses light metering etc. in the body the same as the normal prism viewfinder
  • Used for photography that requires a low angle without bending down or awkward angles where the top of the camera only is accessible
  • Used by photographers who prefer waist-level shooting.
  • $797
XF Prism Viewfinder
XF Prism Viewfinder
  • Viewfinder with hot shoe attachment
  • Exchangeable/collapsible diopter
  • Standard for use with the XF modular body system. Without this, you won’t have a viewfinder at all.
  • $2499
Phase One Camera Strap
Phase One Camera Strap
  • Camera neck strap
  • Wideband for comfort
  • Used for all types of photography
  • Mostly used by photographers who want to waist shoot instead of using a hand strap to secure the camera.
  • $45

Similar Products to Watch Out For

Final Thoughts

Score 4.8PHASE ONE IQ4 XF 150


  • Integrates into a modular system to build the exact camera you need.
  • Eight prime lenses that match the system designed for100MP+ resolution.
  • Schneider Kreuznach leaf shutter lenses
  • Comes with a Pelican style protective case and four batteries
  • Amazing quality images and the ability to live view while taking them is a bonus.


  • Modular system means that the monochromatic and the trichromatic versions are different bodies – have to buy two cameras instead of one if you don’t want to post-process into b/w
  • Expensive.
  • 3-4 hours maximum battery life with two batteries per system means you’ll need a lot of extra battery life.
  • Bulky and heavy