Sony A7S vs Pentax 645Z

Pentax 645Z advantages over Sony A7S

• Larger sensor
  Medium format vs 35mm
  More sensor area. Bigger is (generally) better.
• Fast startup
  ~1.50 vs 2.0 sec
  Faster startup lets you catch the moment
• 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 A7S test data on DxO Mark
  4,505 vs 3,702 iso
  Take photos in low light with less noise
• More dynamic range

  More dynamic range

  Cameras with more dynamic range allow you to take photos with dramatic differences in highlight and shadow areas while retaining detail in both.

  Think of a brilliant sunset on a rocky beach: Bright sunset in the background, with dark rocks in the foreground. High dynamic range means more of the extremes will be faithfully reproduced.

  Dynamic range test data courtesy of DxO Mark.

  645Z test data on DxO Mark A7S test data on DxO Mark
  14.7 vs 13.2 evs
  Retain detail in highlight and shadows
• 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 380 shots
  Capture more photos
• Top deck display
  Yes vs No
  Check settings with a screen on top of the camera
• More viewfinder magnification
  0.78x vs 0.71x
  Get a bigger view of the scene through the eye-level viewfinder
• More pixels
  51.4 vs 12.2 megapixels
  Higher resolution photos
• Dual card slots
  Yes vs No
  Gives you more storage flexibility
• Lacks anti-aliasing filter
  No Filter vs Filter
  Enjoy sharper photos