Pentax 645Z vs Sony A7R II

Pentax 645Z advantages over Sony A7R II

• Larger sensor
  Medium format vs 35mm
  More sensor area. Bigger is (generally) better.
• Bigger pixels
  ~ 5.31 vs 4.51 microns
  Better low-light and dynamic range (all else equal)
• Higher effective ISO

  Higher effective ISO

  Maximum effective ISO is an estimate of the highest sensitivity at which a camera can capture excellent quality photos.

  Cameras with higher effective ISO will be better choices for indoor photography, night shooting, and indoor sports photography, especially if you intend to make large prints.

  You can learn more at our glossary entry.

  Maximum effective ISO test data courtesy of DxO Mark.

  645Z test data on DxO Mark A7R II test data on DxO Mark
  4,505 vs 3,434 iso
  Take photos in low light with less noise
• Longer stills battery life
  More info

  Longer stills battery life

  Cameras with longer battery life can take more photos before exhausting their batteries.

  Special note: The measurement standard for battery life stipulates that if a camera has an internal flash, it must be used for 50% of photos taken. For this reason, comparisons of one camera with an internal flash to another without will not be comparable

  650 vs 340 shots
  Capture more photos
• Top deck display
  Yes vs No
  Check settings with a screen on top of the camera
• More pixels
  51.4 vs 42.4 megapixels
  Higher resolution photos
• Dual card slots
  Yes vs No
  Gives you more storage flexibility
• Higher extended ISO
  204800 vs 102400 ISO
  Higher extended ISO can give more low-light flexibility