116, F90系列、F80系列、F75系列、, F60系列、F55系列、

对焦、变焦和景深

进行对焦前，先旋转变焦环，将焦距调整至所需的构图。如果相机具有景深预览（缩小光圈）按钮或控制杆，则可通过相机取景器预览景深。

•本镜头配备内部对焦（IF）系统。近距离对焦时，焦距会稍微缩短。

•距离刻度不表示拍摄对象和相机之间的精确距离。数值是近似值，应仅用作一般指导。拍摄远景时，景深可能会影响操作，因此相机可能会对焦在近于无穷远的位置上。

•有关景深的更多信息，请参阅第144页的图表。

•当变焦锁定设定到LOCK位置，焦距为28mm时，变焦环被锁定。携带相机时，请锁定变焦环以防止镜头由于自身重量而伸出。

光圈设定

用相机调整光圈设定。

可变最大光圈

将镜头从28mm变焦至300mm会将最大光圈缩小1 1/3档。但是，无需为了获得正确的曝光而调整光圈设定，因为相机会自动补偿这种变化。

对焦

按下表设定相机对焦模式：

相机	相机对	镜头对焦模式选择器
	焦模式	M/A		M

尼康数码单反（尼康FX/DX格式）	AF (C/S)	手动优先自动对焦	手动对焦
相机、F6、F5、F4系列、F100、F90X、
			（可使用电子测距仪。）
F90系列、F80系列、F75系列、
		手动对焦
F70系列、F65系列、	MF
Pronea 600i、Pronea S		（可使用电子测距仪。）

F60系列、F55系列、	AF (C/S)	手动对焦
F50系列、F-801s、F-801、
	MF	（可使用电子测距仪，除了F-601M外。）
F-601M、F-401x、F-401s、F-401

		AF：自动对焦		MF：手动对焦

手动优先自动对焦（M/A模式）

a将镜头对焦模式选择器设定在M/A。

b可以使用自动对焦，但通过半按住快门释放按钮，同时转动独立对焦环，或者在配备AF-ON按钮的相机上按此按钮时转动对焦环，则可取代自动对焦操作。

c再半按一次快门释放按钮或再按一次AF-ON按钮即可取消手动对焦并恢复自动对焦。

116 2191 specifications

The Nikon 2191, also known as the Nikon D780, is a versatile and powerful DSLR camera that has been designed to meet the needs of both professional photographers and serious enthusiasts. As a successor to the popular Nikon D750, the D780 builds upon its predecessor's strengths while incorporating advanced features and technologies that enhance the shooting experience.

One of the standout characteristics of the Nikon 2191 is its impressive 24.5-megapixel full-frame sensor. This sensor delivers outstanding image quality, with a remarkable level of detail, dynamic range, and color accuracy. The D780 is capable of producing stunning images, even in challenging lighting conditions, thanks to its native ISO range of 100 to 51,200, extendable to an incredible ISO 50 to 204,800.

The camera features Nikon's renowned EXPEED 6 image processor, which not only enhances image quality but also improves overall performance. This processor enables faster shooting speeds of up to 7 frames per second in continuous shooting mode with the optical viewfinder. When using live view mode, this rate increases to an impressive 12 frames per second, allowing photographers to capture fast-moving subjects with ease.

Focusing technology is another key highlight of the D780. It employs a 51-point AF system with 15 cross-type sensors, providing reliable and accurate autofocus performance. Additionally, the camera features a new hybrid autofocus system that combines phase detection and contrast detection for faster focusing in live view and video modes. With a focus sensitivity that reaches -4 EV, the D780 excels in low-light situations.

Video capabilities are also a strong point of the Nikon 2191, offering 4K UHD recording at up to 30 frames per second, as well as full HD recording at up to 120 frames per second for slow-motion footage. The camera provides several video options and features, including N-Log and HDR recording, giving videographers creative flexibility.

The D780's robust construction ensures durability and reliability in various shooting environments. It is designed with weather sealing to protect against dust and moisture, making it an ideal companion for outdoor photography. The camera also includes a tilting touchscreen LCD that provides intuitive control and easy access to settings.

In summary, the Nikon 2191/D780 is a powerful, feature-rich camera that excels in both photography and videography. With its full-frame sensor, advanced autofocus system, and outstanding video capabilities, it stands out as a top choice for photographers seeking a versatile and high-performance DSLR.

Nikon 2191 manual 116, F90系列、F80系列、F75系列、, F70系列、F65系列、 Pronea 600i、Pronea S, F60系列、F55系列、

Models: 2191

对焦、变焦和景深

可变最大光圈

按下表设定相机对焦模式：

镜头对焦模式选择器

F90系列、F80系列、F75系列、

F70系列、F65系列、

Pronea 600i、Pronea S

F60系列、F55系列、

F50系列、F-801s、F-801、

116

2191 specifications