|Models/ features||Sony A7R II||Pentax 645z|
|Sensor size||Full frame (35.9 x 24 mm)||Medium format (44 x 33 mm)|
|Low pass filter||No||No|
|Image processor||Bionz X||prime III|
|AF system||Contrast Detect (sensor) + Phase Detect (Hybrid)||Contrast detect|
|ISO||50-102400||100 – 204,800|
|Shutter speed||30 sec 1/8000 sec||1/4000|
|Continuous shooting speed||5fps||3fps|
|Video||3840 x 2160 (30p, 25p, 24p)||1920 x 1080 (60p 50p, 30p, 25p, 24p)|
|Display||3″ Rear Screen Tilting LCD (1,228,800)||3.2″ rear screen tilting LCD(1,037,000)|
|wireless||Built-In with NFC||Wi-Fi|
|Battery life||290 shots||650 shots|
|Dimension||127 x 96 x 60 mm||156 x 117 x 123 mm|
MEGAPIXEL- Which camera either Sony A7r II or Pentax 645Z can offer us the better quality of images in terms of clarity and sharpness? Then the answer is Pentax 645Z, the camera’s creative 51 mp of resolution is so much to provide us the Razor sharp images. While the Sony A7 R II Also has 42 mp of resolution, means the camera also will provide us the sharpness but not as Pentax 645Z.
Image stabilization- The well engineering of 5-axis image stabilization within the design of the lens of Sony A7R II will help you to achieve blurless images by correcting camera shake problem. On the other hand no image stabilization has been incorporated in the Pentax 645Z.
AF points- The superb tracking ability with 399 focal plane phase detection AF points and 25 contrasts detect of a7r ii combined together to bring an uncompromising accuracy of the images with instant capturing of the subjects. While you have only 27 contrasts detect system in Pentax 645Z.
ISO- The 204800 ISO range of the Pentax for better lowlight shooting on the other hand the Sony A7Rii offers you 102400 only.
Shutter speed- Shutter speed of a7r II is 30 sec 1/8000 sec that enable the camera to freeze the action of the fast moving subjects more easily on the other hand Pentax 645z has 1/4000.
Continuous shooting speed- The 5fps of Continuous shooting speed of Sony A7R II will help you to get lesser noise images when you go to shoot at maximum ISO during lowlight situation; on the other hand you have only 3fps offers by Pentax 645Z.
Video- The ability to record 4K video in multiple formats including Super 35mm (without pixel binning) and full-frame format within A7R II, a world’s first for digital cameras. 4K quality (QFHD 3840×2160) in either Super 35mm crop mode or full-frame mode. While you can record only Full HD video by Pentax 645Z.
Verdict- Except resolution and sensor the Pentax is not looking so strong in overall comparison, so Sony A7 R II will be better choice.