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Comparison Nikon 35mm f/1.8G AF-S vs Nikon 35mm f/2.0D AF Nikkor

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Nikon 35mm f/2.0D AF Nikkor
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Lens typefixfix
System
Nikon
Nikon
Mount
Nikon F
Nikon F
Specs
Focal length35 mm35 mm
Aperture valuef/1.8f/2.0
Viewing angles
62° /44° with APS-C sensors (Nikon DX format)/
Min. diaphragm1622
Minimum focus distance0.25 m0.25 m
Maximum zoom0.240.24
Design
Sensor sizefull frame/APS-Cfull frame/APS-C
Autofocus driveultrasonic drive motoris absent
AF drive (screw driven)
Design (elements/groups)
11 elements in 8 groups /1 ED glass element, 1 aspherical element/
6 elements in 5 groups
Number of diaphragm blades77
Filter diameter58 mm52 mm
Dimensions (diameter/length)72х72 mm65x44.5 mm
Weight305 g205 g
Added to E-Catalogjanuary 2014november 2006

Aperture value

Lens aperture is a characteristic that determines how much the lens attenuates the light flux passing through it. It depends on two main characteristics — the diameter of the active aperture of the lens and the focal length — and in the classical form is written as the ratio of the first to the second, while the diameter of the active aperture is taken as a unit: for example, 1 / 2.8. Often, when recording the characteristics of a lens, the unit is generally omitted, such a record looks, for example, like this: f / 1.8 or f/2.0. At the same time, the larger the number in the denominator, the smaller the aperture value: f / 4.0 lenses will produce a darker image than models with f / 1.4 aperture.

Zoom lenses usually have different aperture values for different focal lengths. In this case, the characteristics indicate two aperture values, for the minimum and maximum focal lengths, respectively, for example: f / 4.5-5.6

The larger the aperture of the lens, the shorter shutter speeds it allows you to use when shooting. This is especially important when shooting fast-moving subjects, shooting in low light, etc. And if necessary, the light stream transmitted by the lens can be weakened using a diaphragm (see below).

Another point that directly depends on this indicator is the depth o...f field (the depth of space that is in focus when shooting). The higher the aperture, the smaller the depth of field, and vice versa. Therefore, shooting with artistic background blur (bokeh) requires high-aperture optics, and for a large depth of field, you have to cover the aperture.

Viewing angles

This parameter determines the size of the area of the scene being shot that falls into the frame. The wider the viewing angles, the larger the area the lens can capture in one shot. They are directly related to the focal length of the lens (see "Focal length"), and also depend on the size of the specific matrix with which the optics are used: for the same lens, the smaller the matrix, the smaller the viewing angles, and vice versa. On our website, in the characteristics of optics, viewing angles are usually indicated when used with the matrix for which the lens was originally designed (for more details, see "Matrix Size").

Min. diaphragm

Aperture is a design of several blades-curtains, which allows, if necessary, to reduce the diameter of the active aperture of the lens, actually reducing its aperture (for more details, see "Aperture"). In addition to reducing the light output (which can be relevant, for example, in bright sunlight), closing the aperture has another effect — it increases the depth of field. In other words, “in focus” is a larger volume of space than with an open aperture.

The values on the aperture scale are usually selected from a standard range. The numbers in it actually indicate what aperture the lens will have when the aperture is closed to a given value: for example, an aperture value of 5.6 will correspond to f / 5.6 aperture. The larger the number indicating the minimum aperture value, the more options the photographer has and, accordingly, the possibilities for setting the shooting mode (ceteris paribus).

Autofocus drive

A type of drive that ensures the movement of lens structural elements during automatic focus. Currently, the following types can be used:

Ultrasonic motor. The most advanced type of drive to date. Ultrasonic motors are much faster than conventional motors, provide higher accuracy, consume less power and are virtually silent. However, their cost is quite high.

Stepper motor. Drive control focal length and zoom (zoom). This type of motor is used for the most part only in full-size digital cameras. Among the advantages of a stepper motor, one can note: high reliability and accuracy of operation; in addition, it does not require power supply to maintain focus and zoom. Of course, stepper motors are not without drawbacks. Among the minuses can be identified: slow speed and increased noise. Additionally, a stepper motor is characterized by large dimensions and a rather large weight, which physically does not allow this type of drive to be integrated into the optics of mobile phones and ultra-compact cameras.

— Motor. In this case, an electric motor of a traditional design is meant. Such drives are simple and, as a result, inexpensive. Their disadvantages are the relatively low speed of operation, as well as the noise produced during this; the latter can sometimes be critical — for example, when shooting wildlife. Recently, designers have been us...ing various tricks to neutralize these shortcomings, but in general, the characteristics of conventional motors still remain relatively modest.

— Is absent. The complete absence of an autofocus motor in the lens. Focus such optics can be carried out either by the “screwdriver” system, or strictly manually (for more details on both options, see below).

AF drive (screw driven)

The presence in the lens of an autofocus drive of the "screwdriver" type. Lenses of this design do not have their own autofocus motor at all — it is located in the camera. Interchangeable optics, on the other hand, carries only the focus mechanism itself and has a special socket, with which, when installing the lens, the axis of the camera motor is joined.

Historically, the "screwdriver" is one of the first types of autofocus, but lenses and cameras with this feature are still widespread, in particular with Pentax and Sony Alpha. There are several reasons for this: although “screwdrivers” lose to ultrasonic drives, for the most part they outperform lenses with traditional motors; at the same time, due to the transfer of the engine to the camera, the weight and dimensions of the lens are reduced.

Design (elements/groups)

The number of elements (in fact, the number of lenses) included in the design of the lens, as well as the number of groups in which these elements are combined. Usually, the more elements provided in the design, the better the lens handles with distortions (aberrations) when light passes through it. On the other hand, numerous lenses increases the dimensions and weight of the optics, reduces light transmission (for more details, see "Aperture") and also puts forward increased requirements for the quality of processing, which affects the cost of the lens.

Filter diameter

Thread diameter for installation on the filter lens. Light filters are devices for changing the parameters of the light flux entering the lens. They can be used for highlighting individual colours, coloring the entire image in one colour, darkening the image, correcting colour temperature and light balance, shooting in the infrared range, etc. Also, a light filter can play the role of protection against pollution. For successful installation on the lens, the diameter of the filter must match the diameter of the filter specified for this model of optics.
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