Depth of Field

Depth of field refers to the zone of acceptable focus extending in front of and behind the plane of sharpest focus. As this zone is excep- tionally shallow at high reproduction ratios, previewing is desirable before shooting. To preview, press the depth-of-field button on the camera and the lens will close to the preselected aperture to allow you to see how much background and foreground is in focus. Depth of field can also be observed by reading the color-coded indicators inscribed on the lens barrel. The pairs of colored lines on either side of the white distance scale index line correspond to f/numbers of the same color on the aperture scale. At close distances, so little is in focus that the depth-of-field tables on pages 13 ~ 14 are more useful.

NOTES ON FOCUSING

Camera Shake: Close-up photography poses several problems not encountered in general photography. One of these is sensitivity to vibration—the magnification of the image is so high that even slight displacement during shooting results in a blurred image. Therefore, the use of a tripod is recommended at all times, with shutter actuated via cable release. In this respect, the convenient, 360° rotatable tripod mounting collar on the PN ring will prove useful.

Close Working Distances: At high reproduction ratios encountered during close-up shooting, depth of field decreases drastically. This con- dition can be partially compensated for by stopping down the lens. But at very close working distances, an extremely shallow depth of field is inevitable. Careful placement of the camera will be necessary to ensure that the important surfaces of the subject are in the same zone of sharpness.

Micro-Nikkor 105mm f/4 specifications

The Nikon Micro-Nikkor 105mm f/4 is a renowned macro lens that has captured the interest of photographers, particularly those specializing in close-up and nature photography. With its extraordinary delivery of sharpness and precision, this lens has established itself as a favorite among both amateurs and professionals.

One of the main features of the Micro-Nikkor 105mm f/4 is its impressive 1:1 reproduction ratio. This capability allows photographers to capture life-sized images of small subjects, making it ideal for macro photography. The lens provides a working distance of approximately 6.3 inches, which is advantageous for keeping a safe distance from delicate subjects, such as insects and flowers, ensuring that they remain undisturbed.

The lens construction includes 9 elements in 8 groups, which work together to minimize chromatic aberrations and distortions. This optical design, along with the Nikon multicoating technology, enhances light transmission and reduces flare and ghosting, resulting in clearer and more vibrant images. The lens exhibits exceptional sharpness, even at its maximum aperture of f/4, while maintaining good image quality throughout its aperture range.

Another significant feature of the Micro-Nikkor 105mm f/4 is its focus mechanism. The lens utilizes a manual focus system with a smooth focus ring, making it easier for photographers to achieve precise control when working with close-up subjects. Furthermore, it has a relatively compact and lightweight design, making it portable for outdoor shooting.

The Micro-Nikkor 105mm f/4 is equipped with the well-regarded Nikon close-up capability, allowing users to easily shoot in challenging macro environments. It also has a rubber seal that offers some degree of protection against dust and moisture, although it is not entirely weather-sealed.

Additionally, this lens is compatible with Nikon's tele converters, which can extend its focal length for even greater close-up capabilities while retaining image quality.

In conclusion, the Nikon Micro-Nikkor 105mm f/4 stands out with its high-quality optics, versatile macro capabilities, and user-friendly design. It is a valuable tool for photographers looking to explore the intimate details of the small world around them.