Nikkor 70-210mm f/4 AF

I used a Nikkor 70-210mm f/4 AF lens on a Nikon D50. Here it faced a stern test: 1600 ISO; 210mm; 1/100th (far too slow - you can see the camera shake) and wide open at f/4. I broke practically all the rules. The Nikkor 70-210mm f/4 AF lens, introduced in 1986, was made for only 18 months, and was replaced by the smaller, slower and cheaper AF 70-210mm f/4-5.6. The AF 70-210mm f/4 is largely distortion-free, whereas the successor AF 70-210mm f/4-5.6 is handicapped by high levels of distortion. This lens is useful on several counts. If your digital SLR has the AF screw drive, you can use all the features of this lens without hindrance. It is a good deal lighter to carry than an f/2.8 alternative, and only one stop different throughout the focal range, being a lens of constant aperture.

Photographed with a Nikon D2Xs and an AF Zoom-Nikkor 70-210mm f4 lens. 200 ISO; f/7; 1/200th. Lens at 210mm. The Nikon Zoom-Nikkor AF 70-210mm f/4 of 1986 was derived from the earlier manual focus Nikon Series E 70-210mm f/4. The Series E version had been a slide zoom, but when it was introduced as an AF lens, it became a two-ring zoom. The Nikkor 70-210mm f/4 AF was Nikon's first AF telephoto zoom of 1986. It was made for only 18 months, to be replaced by the smaller, slower and cheaper AF 70-210mm f/4-5.6. The AF 70-210mm f/4 is largely distortion-free, whereas the successor AF 70-210mm f/4-5.6 is handicapped by high levels of distortion. Optically both the Nikon Series E 70-210mm f/4 and the Nikkor 70-210mm f/4 AF are similar to the Nikkor 80-200mm f/4 AI-s. The short-lived Zoom-Nikkor AF 70-210mm f/4 was rushed out as a stop-gap when Nikon realised customers were more enthusiastic over automatic focus technology than the company had supposed. The lens was never regarded as a commercial success, although part of the reason might have been its fairly high price. From the point-of-view of the amateur photographer, however, the lens is useful on several counts. If your digital SLR has the AF screw drive, you can use all the features of this lens without hindrance. It is a good deal lighter to carry than an f/2.8 alternative, and only one stop different throughout the focal range, being a lens of constant aperture. A constant aperture is a useful quality in a zoom lens. Constant aperture zooms tend to be higher quality lenses. These days only professional zoom lenses are of this type. Most consumer zoom lenses have a variable maximum aperture. If you look at zoom lenses that are not constant aperture, you will notice that as you zoom out, the maximum aperture changes to a bigger f/ number. In practical terms what this means is that as you zoom out, the viewfinder gets dimmer because the maximum aperture is getting smaller. A constant aperture lens is designed so that the size of the aperture opening will change in relation to the zoom position; thus if you select f/4, you will have f/4 at any focal length. There are other advantages of a constant aperture lens: there is a lot less refocussing as you zoom; in manual mode, you don't have to change your shutter speed whenever you zoom in or out; your exposure won't change as you zoom; and the lens barrel doesn’t extend or retract when the focal length changes.

AF Zoom-Nikkor 70-210mm f/4 lens. This lens uses the optics of the earlier Nikon Series E 70-210mm f/4. In 1986 it appeared in an AF version. The Series E version had been a slide zoom, but when it was introduced as an AF lens, it became a two-ring zoom. The Nikkor 70-210mm f/4 AF was Nikon's first AF telephoto zoom of 1986. It was made for only 18 months, to be replaced by the smaller, slower and cheaper AF 70-210mm f/4-5.6. The AF 70-210mm f/4 is largely distortion-free, whereas the successor AF 70-210mm f/4-5.6 is handicapped by high levels of distortion. Optically both the Nikon Series E 70-210mm f/4 and the Nikkor 70-210mm f/4 AF are similar to the Nikkor 80-200mm f/4 AI-s. The short-lived AF 70-210mm f/4 was rushed out as a stop-gap when Nikon realised customers were more enthusiastic over automatic focus technology than the company had supposed. The lens was never regarded as a commercial success, although part of the reason might have been its fairly high price. From the point-of-view of the amateur photographer, however, the lens is useful on several counts. If your digital SLR has the AF screw drive, you can use all the features of this lens without hindrance. It is a good deal lighter to carry than an f/2.8 alternative, and only one stop different throughout the focal range, being a lens of constant aperture. A constant aperture is a useful quality in a zoom lens. Constant aperture zooms tend to be higher quality lenses. These days only professional zoom lenses are of this type. Most consumer zoom lenses have a variable maximum aperture. If you look at zoom lenses that are not constant aperture, you will notice that as you zoom out, the maximum aperture changes to a bigger f/ number. In practical terms what this means is that as you zoom out, the viewfinder gets dimmer because the maximum aperture is getting smaller. A constant aperture lens is designed so that the size of the aperture opening will change in relation to the zoom position; thus if you select f/4, you will have f/4 at any focal length. There are other advantages of a constant aperture lens: there is a lot less refocussing as you zoom; in manual mode, you don't have to change your shutter speed whenever you zoom in or out; your exposure won't change as you zoom; and the lens barrel doesn’t extend or retract when the focal length changes. There is an informative article about the Nikkor 70-210mm f/4 AF at www.dantestella.com/technical/70210.html

Nikon D2Xs + AF Nikkor 70-210mm f/4 lens.

Nikon D2Xs and AF-Nikkor 70-210mm f/4 zoom lens.

Maybe this Union Jack In tatters personifies the fragile state of the United Kingdom on the eve of the Scottish people deciding their future in a referendum on continued union with England, Wales, and Northern Ireland. Whatever the outcome of the referendum, it has highlighted the need for reform of the British Constitution whether Scotland remains a part of the UK or not. Nikon D2Xs and AF-Nikkor 70-210mm f/4 zoom lens.

Wells market place glimpsed from the entrance to Wells Cathedral, Somerset. Nikon D700 + AF Zoom-Nikkor 70-210mm f/4 lens.

The Bishops' Palace, Wells, Somerset. Nikon D700 + AF Zoom-Nikkor 70-210mm f/4 lens.

East Somerset Railway. Nikon D700 + AF Zoom-Nikkor 70-210mm f/4 lens.