Dec 9, 2012 - What serial numbers are the best for buying a used Nikkor 50mm f/1.2? Correct that more aperture blades is considered to improve the bokeh. Like my AIS 85mm 1.4 nothing about AFD or cheep stuff, so I not regret at all!

Nikkor standard lenses Introduction What´s a standard lens? In photography a standard lens is considered to be a lens with a focal length equaling - more or less - the diagonal of the film/frame format. Photography the most common film format is 24 x 36 mm. The diagonal of that format is 43.3 mm. Half-frame format (18 x 24 mm.), which is close to the DX-sensor format used in Nikon digital SLR´s, has a diagonal of 30 mm.

So, for SLR´s using 35mm. Film a standard lens would be a lens with a fixed focal length of approx.

For a digital SLR the standard lens should have a fixed focal length of 30 mm. A co-incidence of the size of the before mentioned diagonal is the viewing angle of the standard lens, which ranges between 45 and 55 °. Many lens manufacturers have chosen for the rounded average of 50 mm. As focal length for their standard lens. This has nothing to do with the contention of many publicists that the viewing angle of the human eye would equal the viewing angle of a standard lens. The viewing angle of one human eye comes closer to a lens with a focal length of 18 mm.

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Nikon produced various standard lenses with focal lengths from 45 - 58 mm. In its early days it was difficult to produce a fast lens - maximum aperture f/1.2 or faster - at a focal length of 50 mm or shorter.

Many fast lenses had focal lengths of 55mm and longer. The lens designer has to take into consideration the distance between the rear lens and the plane film and the maximum width of the lens mount. The Nikon F-mount allows a maximum rear lens diameter of 40 mm. Gsa email spider crack. In SLR cameras the mirror house is playing an important role as well. The fastest lens Nikon produced for the F-mount cameras has a maximum aperture of f/1.2. The three fastest standard lenses for Nikon SLR cameras ever made Hereafter all standard lenses will be presented - in chronological order - and reviewed.

Since Nikon offers a lot of zoom-Nikkors standard lenses with a fixed focal length - aka prime lenses - have become less popular. Nevertheless they are very well usable in low-light conditions as zoom lenses are not faster than f/2.8. All lenses mentioned below can take filters and hoods with a 52 mm. Nikon produced some special lenses with a focal length of 55 mm., so called Micro-Nikkors, which are not listed here. The fixed, thus non-interchangeable standard lenses of the Nikkorex SLR cameras are not listed either. The three most popular and produced standard lenses (over 1,5 million of each lens) Identifications & markings All Nikkor lenses are engraved with some data which might be unknown to many people.

Nikon named its lenses Nikkor since the early 1930´s. The factory´s name Nippon Kogaku Japan was engraved in the name ring, replaced by a simple Nikon in the 1970´s. As nearly all Nikon products, lenses have a serial number (6 or 7 digits), on older lenses preceded by No.

The latter disappeared in the 1970´s as well. On older lenses the word auto indicates that the lens has an automatic diaphragm/aperture; in the 1960´s a modern feature as many lenses had a preset aperture.

The very early lenses have the focal length marked in cm., later changed into mm. The maximum aperture was indicated as f=2, later 1:2. This indication refers to the relation/ratio of the focal length of a lens and its maximum aperture. On the aperture ring the possible aperture settings of a lens are indicated: 1 - 1.4 - 2 - 2.8 - 4 - 5.6 - 8 - 11 - 16 - 22. This is an arithmetical series, in which the next lower number equals a twice faster aperture. In other words: a lens (of a certain focal length) with a maximum aperture of f/1.4 is twice as fast as a lens (with identical focal length) with a maximum aperture of f/2. On some lenses a maximum aperture in between two aperture values are given: 1.8 is half way 1.4 -2, as 1.2 is halfway 1 - 1.4.