Nikon NIKKOR 35-70 mm F/3.5 Ai Lens offers a professional mid-range zoom for pleasing shots. It has a constant f/3.5 aperture at all focal lengths for maximum light entry, and the diaphragm has seven traditional straight blades. Zooming is achieved by moving the elements inside the lens barrel. This NIKKOR equipment offers capable performance for both normal and infrared shooting. In fact, Nikon NIKKOR 35-70 mm F/3.5 Ai version is compatible with many different Nikon cameras. The lens construction supports 10 elements in 9 groups with a minimum distance focus of only 1 meter with no macro modes. A compact dimension of 2.9 by 3.6 inches and a weight of only 19 ounces make it extremely portable. In addition, the Nikon MF quality construction ensures safety. Similarly, designers have incorporated several traditional features, making it easier for both amateurs and professionals to quickly get used to working this lens. A traditional spherical design on the zoom lens, multi-coated optics, and front-group focusing are all offered. For sharp results, this zoom lens aims to perform even in the most challenging environments. It provides good results for center and corners. You may need to slightly adjust the 35 mm, 50 mm, and 70 mm focal length when shooting; sharp results can be achieved almost immediately under normal circumstances. Just like other traditional Zoom-NIKKOR brands, you can easily zoom in and out of the subject by moving elements inside the barrel. When zooming, the inside ring will start to move, forcing the glass up or down. The mechanism increases the safety of the equipment because a glass protecting the optics shields any direct hit. The focus can be achieved using a fingertip to zoom from 3 feet to infinity. The barrel is designed to incorporate all the zooming functions. While the exterior of the lens remains stationary, the front and rear groups operate inside the barrel. The great design of this zoom lens is enhanced by its compatibility with numerous hardware and software. On D-series products, such as D2, D3, D200, and D300, it provides a full matrix reading and the EFIX data. It will automatically adjust to either the aperture preferred or manual mode on the camera. The lens will also work with F-series products, including F and F6. It should also fulfill requirements of many modern manual focus brands. Regarding software compatibility, owners can use Photoshop software to correct and filter any distortion in this type of zoom lens. Professional photographers can also use it as a handheld, and the two-zoom ring function will specifically come in handy using the tripod. The Nikon Zoom-NIKKOR 35-70 mm f/3.5 version is a professional-grade Nikon hardware that was introduced in 1977 and replaced by Ai-s four years later. Nikon only produced 50,000 of these professional mid-range lenses, which also means that you are likely getting your hands on a rare masterpiece. The exceptional quality of engineering used in these lenses is also practical for infrared shooting as they have a huge focus shift at 35 mm.