6.成像比率已预先确定情况下的对焦

所谓成像比率,是指记录在胶片上的影像尺寸与被摄物的真实尺 寸之间的比例关系。例如,设对焦屏上的影像大小是被摄物实际 尺寸的五分之一,那么成像比率就是1:5。在按照预先决定的成 像比率进行拍摄时,应遵循以下步骤:

a手动调节对焦环,使所需的成像比率数值对准距离标线。

b对准被摄物,然后通过靠近或远离被摄物来调整你的位置。使 得取景器中的图像最为清晰。

若要取得与各种对焦距离相对应的适当成像比率,请参阅第150页 的表格。

7.有关特写摄影和翻拍摄影的说明

照相机的晃动

AF-S微距尼克尔 60mm f/2.8G ED镜头提供了非常高的影像放大倍 率,以至于拍摄时稍有移动就会造成影像模糊。为此一定要把照 相机固定在三角架上,并使用快门线或遥控线来启动快门。

近摄距离

拍摄特写时如果使用大成像比率,景深就会很小。为确保较大的 景深,需收缩光圈,然后仔细地调整照相机的位置,以确保被摄 物上最重要的表面都置于清晰对焦的范围之内。

使用近摄镜头时,请使用手动对焦。

近摄配件

成像比率

被摄影物范围(厘米)

对焦距离(厘米)

 

 

 

 

 

 

No. 5T

1/11.11.07

26.7 x 40.0 2.24 x 3.36

80.6 18.5

 

No. 6T

1/5.7 1.14

13.6 x 20.5 2.11 x 3.16

48.2 18.5

Ck

No. 5T + 6T

1/4.2 1.20

10.0 x 15.0 2.00 x 3.00

41.2 18.5

 

115

Page 115
Image 115
Nikon AF-S user manual 成像比率已预先确定情况下的对焦, 115

AF-S specifications

The Nikon AF-S 35mm f/1.4G lens is a highly regarded prime lens designed for Nikon’s FX-format (full-frame) and DX-format (crop sensor) cameras. Known for its exceptional optical performance and versatility, the lens is a popular choice among professional photographers and serious enthusiasts.

One of the standout features of the AF-S 35mm f/1.4G lens is its large maximum aperture of f/1.4. This wide aperture allows for outstanding low-light performance, enabling photographers to capture sharp images even in dimly lit environments. The lens also provides beautiful background bokeh, making it ideal for portraiture and street photography, where subject isolation is desired.

The optical construction of the lens consists of 11 elements in 9 groups, which includes two aspherical lens elements. These aspherical elements help to minimize optical distortions and ensure that image quality remains consistent across the frame. The lens also incorporates Nikon's Super Integrated Coating (SIC), which enhances light transmission and reduces flare and ghosting, resulting in improved contrast and color accuracy.

An essential characteristic of the AF-S 35mm f/1.4G is its Silent Wave Motor (SWM) technology. This innovative motor provides fast, quiet, and precise autofocus capabilities, allowing photographers to lock onto subjects with ease. The lens also features a focus switch that enables seamless switching between automatic and manual focus modes, granting photographers full control over their shooting experience.

Durability is another significant aspect of the lens’ design. The AF-S 35mm f/1.4G features a weather-sealed construction, making it a reliable choice for outdoor photography, even in challenging weather conditions. The lens is designed to withstand dusty environments and moisture, ensuring longevity and performance in a variety of scenarios.

Additionally, the lens has a filter diameter of 67mm, making it compatible with a range of filters such as polarizers and ND filters to enhance creative possibilities. Weighing approximately 600 grams, the lens strikes a balance between portability and robust build quality, making it an excellent companion for various photography styles.

Overall, the Nikon AF-S 35mm f/1.4G lens is a remarkable choice for photographers seeking a high-performance prime lens. Its superb optical quality, fast autofocus, and durable design make it a reliable option for a wide range of photographic applications, solidifying its position as an essential tool in the arsenal of many professionals.