The Nikon D4 is a professional-grade DSLR camera that was introduced by Nikon in January 2012. It was designed for professional photographers and is known for its high performance, especially in low-light conditions and fast-paced shooting environments. 

Sensor 

The Nikon D4 features a 16.2-megapixel FX-format CMOS sensor. This full-frame sensor is known for its excellent image quality, wide dynamic range, and low-light performance.

ISO Range 

One of the standout features of the D4 is its wide ISO range. It offers a standard range of ISO 100-12800, which is expandable to an impressive ISO 50-204800. This makes the camera exceptionally capable in low-light conditions and versatile across various lighting situations.

Autofocus System 

The camera is equipped with a Multi-CAM 3500FX autofocus sensor module with 51 focus points, including 15 cross-type sensors. This advanced AF system provides fast and accurate focusing, which is crucial for capturing sharp images, particularly in action and sports photography.

Continuous Shooting Speed 

The D4 can shoot up to 10 frames per second with full AF/AE performance, making it suitable for capturing fast-moving subjects.

Video Capabilities 

The Nikon D4 also offers robust video capabilities, including the ability to shoot full HD 1080p video at various frame rates. It also provides uncompressed HDMI output and offers manual control over exposure and audio levels during video recording.

Build and Design 

The D4 has a durable magnesium alloy body that is weather-sealed to resist dust and moisture, making it reliable for use in challenging environments. The ergonomic design and controls are tailored for ease of use, especially for those who need to operate the camera for extended periods.

Connectivity

 It includes Ethernet connectivity for fast image transfer, which can be particularly useful for sports and news photographers who need to send images quickly.

Battery Life

The D4 uses an EN-EL18 battery, which provides excellent battery life, allowing photographers to shoot for extended periods without the need for frequent battery changes.

Successor Models 

The Nikon D4 was succeeded by the Nikon D4S in 2014, which brought some enhancements over the D4, including improved autofocus, faster continuous shooting, and better image processing.

The Nikon D4, at its time of release, was a top-tier camera choice for professional photographers, especially in fields like sports, wildlife, and photojournalism, where speed, reliability, and low-light performance are critical.