摄影中的概念

 

 

 

 

 

光圈大小由称为焦距比数的值表示。焦距比数表示焦距除以镜头

直径。例如,如果具有 50 mm 焦距的镜头的焦距比数为 F2,则光圈

的直径为 25 mm(50mm/25mm=F2) 焦距比数越小,光圈越大。

光圈中的开口称为曝光值 (EV)。曝光值增加 (+1 EV) 意味着光量增加

一倍。曝光值减少 (-1 EV) 意味着光量减半。您还可以使用曝光补偿功

能微调光量,细分曝光值为 1/21/3 EV,以此类推。

 

+1 EV

 

-1 EV

 

 

 

F1.4

F2

F2.8

F4

F5.6

F8

 

 

曝光值间隔

 

 

曝光值和景深

您可以通过控制光圈使相片背景模糊或清晰。这与景深 (DOF) 密切相 关,景深可表示为小或大。

使用大景深拍摄的相片 使用小景深拍摄的相片

光圈罩包含数个叶片。这些叶片一块移动,控制通过光圈中心的光量。叶片 数还影响拍摄夜景时的光形状。如果光圈有偶数个的叶片,则光会分割为相 等个数的部分。如果叶片个数为奇数,则部分数是叶片数的两倍。

例如,具有 8 个叶片的光圈将光分割为 8 个部分,具有 7 个叶片的光圈将光 分割为 14 个部分。

7 个叶片

8 个叶片

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Samsung EV-NX200ZBABHU, EV-NX200ZBSBSE, EV-NX200ZBSBDK 曝光值和景深, 光圈大小由称为焦距比数的值表示。焦距比数表示焦距除以镜头, 能微调光量,细分曝光值为 1/2、1/3 EV,以此类推。

EV-NX200ZBABSE, EV-NX200ZBABCH, EV-NX200ZBABHU, EV-NX200ZBSBDK, EV-NX200ZBSBSE specifications

The Samsung EV-NX200ZBSBSE and EV-NX200ZBSBDK are part of the NX series of compact interchangeable lens cameras, designed for photography enthusiasts seeking advanced features in a compact body. With a fusion of style, performance, and technology, these models stand out in the competitive market of mirrorless cameras.

One of the most significant features of the NX200 series is its 20.3-megapixel APS-C CMOS sensor, which delivers exceptional image quality. The larger sensor size helps in capturing more light, resulting in better performance in low-light conditions and enhanced detail in images. This capability is further complemented by a maximum ISO sensitivity of 12,800, allowing for flexible shooting options in various environments.

The cameras offer fast autofocus technology, utilizing a Hybrid AF system that combines phase detection and contrast detection, making it easier to capture moving subjects with precision. The result is sharp images even in challenging conditions, enhancing the overall photography experience.

Both models boast a compact and lightweight design, making them highly portable for travel and daily use. The EV-NX200ZBSBSE features a sleek silver finish, while the EV-NX200ZBSBDK is offered in a stylish black finish, catering to different aesthetic preferences. Additionally, the ergonomic grip ensures comfortable handling during extended shooting sessions.

The NX200 series is equipped with a 3-inch AMOLED display with a resolution of 768k dots, providing vibrant colors and sharp details for reviewing images and navigating through menus. The screen is also tiltable, allowing users to adjust the angle for high or low-angle shots, which adds versatility to the shooting experience.

Another noteworthy aspect of the NX200 is its advanced connectivity features. Users can share their photos and videos instantly through built-in Wi-Fi, enabling quick uploads to social media or cloud storage. Furthermore, the Smart Link feature allows for remote shooting via a smartphone, giving users greater control over their photography.

In terms of video capabilities, the NX200 models support full HD 1080p recording at various frame rates, providing filmmakers and content creators with the tools to capture high-quality video. The presence of microphone input also allows for improved audio capture, essential for professional video work.

With a robust selection of interchangeable lenses available, the Samsung EV-NX200ZBSBSE and EV-NX200ZBSBDK cater to a wide range of photography styles, from landscapes to portraits. The combined features of performance, portability, and connectivity make these cameras an excellent choice for both amateur and seasoned photographers alike.