The differences between Z50II and Z50 / Z30 are as follows:
|   | Z50II | Z50 | Z30 | 
Dimensions (Approx.)
  | 127 x 96.8 x 66.5 mm | 126.5 x 93.5 x 60 mm | 128 x 73.5 x 59.5 mm | 
Weight (Approx.)
  | 520g | 450g | 405g | 
| Picture Control | 
  31 types 8 traditional Picture Controls plus: • Flat Monochrome • Deep Tone Monochrome • Rich Tone Portrait 20 Creative Picture Controls    
 |  28 types 8 traditional Picture Controls 20 Creative Picture Controls   |  28 types 8 traditional Picture Controls 20 Creative Picture Controls  | 
| Image Processor | EXPEED 7 | EXPEED 6 | EXPEED 6 | 
| Low-light AF Detection |  -9 EV |  -4 EV |  -4.5 EV  | 
| Monitor | 3.2 inch 1.04 million dot Vari-angle monitor + Self-portrait mode | 3.2 inch 1.04 million dot Tilting monitor | 3.0 inch 1.04 million dot Vari-angle monitor + Self-portrait mode | 
| EVF Brightness | 1000 cd/m2 Approx. 2360k-dot (XGA) OLED 13 level manual brightness controls EVF design with reduced protrusion
  | 500 cd/m2 Approx. 2360k-dot (XGA) OLED 7 level manual brightness controls
  |  No electronic viewfinder | 
| Subject Detection | 9 types (People, Dogs, Cats, Birds, Cars, Motorcycles, Bicycles, Trains, Airplanes) | 3 types (People, Dogs, Cats) | 3 types (People, Dogs, Cats) | 
| ISO Sensitivity | 100 - 51200 | 100 - 51200 | 100 - 51200 | 
| Terminals | USB Type-C | Micro USB | USB Type-C | 
| 4K Video | 5.6K oversampled 4K 30p 4K 60p (crop) | 4K UHD/30p | 4K UHD/30p | 
| Maximum Video Recording Time | 125 min. * | 29 min 59 sec | 125 min. * | 
* When set to Full HD 24p/25p and at an ambient temperature of 25°C.
Under other conditions, 125 minutes may not be reached depending on battery life and the camera's internal temperature.
The estimated recording time for 4K is about 35 minutes.
 
|   | Z50II | Z50 | Z30 | 
HEIF image quality mode | ✓ | ‒ | ‒ | 
| Nikon Imaging Cloud | ✓ | ‒ | ‒ | 
Picture Control Flexible Colour | ✓ | ‒ | ‒ | 
| Picture Control Button | ✓ | ‒ | ‒ | 
| Changing the Picture Control in AUTO mode | ✓ | ‒ | ‒ | 
3D-Tracking Auto-focus | ✓ | ‒ | ‒ | 
Pre-Release Capture | ✓ | ‒ | ‒ | 
| High-speed frame capture+ (C15, C30) | ✓ | ‒ | ‒ | 
 Skin softening Portrait impression balance |  ✓ |  ‒ |  ‒ | 
|  Starlight View |  ✓ |  ‒ |  ‒ | 
 N-Log HLG recording |  ✓ | ‒ |  ‒ | 
|  High-resolution zoom |  ✓ |  ‒ |  ‒ | 
|  Product review mode |  ✓ |  ‒ |  ‒ | 
|  Video self-timer |  ✓ |  ‒ |  ‒ | 
|  REC lamp |  ✓ |  ‒ |  ‒ | 
|  UVC/UAC support |  ✓ |  ‒ |  ‒ | 
|  Waveform Monitor |  ✓ |  ‒ |  ‒ |