Understanding Nikon DX Format and Lenses: A Comprehensive Guide

Nikon's DX lenses are specifically designed for Nikon DX cameras, which are crop sensor cameras. These lenses work perfectly on DX-format cameras, providing a unique and cost-effective solution for photographers. By utilizing a smaller sensor size, Nikon DX lenses enable the development of smaller and more economical cameras and lenses compared to full-frame FX cameras.

Understanding Nikon DX Format

Nikon DX format is an alternative name used by Nikon for the APS-C image sensor format, measuring approximately 24x16mm. This is roughly 2/3 the size of a full-frame FX sensor, which measures 36x24mm. The DX format was created by Nikon to cater to its digital SLR cameras, many of which are equipped with DX-sized sensors.

The Role of DX Lenses

DX lenses are specifically intended for Nikon crop sensor cameras. These lenses cover the smaller APS-C sensor area, which is roughly 24mm wide. In contrast, FX lenses cover the full-frame sensor area, which measures approximately 36mm wide, the same as the 8-perf 35mm still camera format.

Effects of Mounting FX Lenses on DX Cameras

While FX lenses can be mounted on DX cameras, they do not provide full coverage. This means that the edges of the image are cut off, but the quality of the cropped image can be surprisingly good. For example, the 24mm wide sensor of a DX camera effectively uses a portion of a 36mm wide FX sensor, resulting in a higher quality crop. This principle was used by the author's father to achieve high-quality photography with entry-level cameras.

Introduction to DX Camera Sensors

The Nikon DX sensor, a version of the APS-C sensor, is ideal for photographers looking for budget-friendly yet high-quality cameras. APS-C sensors are approximately 2/3 the size of 35mm film negatives, which are considered full frame. These smaller sensors are more affordable and are commonly found in entry-level DSLR cameras.

Professional Grade DX Lenses

There are professional DX lenses such as the AT-X PRO with a constant aperture. These lenses are specifically designed for crop sensor cameras, offering both the quality and convenience required by professional photographers. The term DX can also refer to the sensor size in millimeters, with a common DX sensor size being 23.6 x 15.6mm.