Flash guide number

Concepts in Photography

Flash

Light is one of the most important components in photography. It’s not easy, however, to have an enough amount of light anytime and anywhere. Making use of a ﬂash allows you to optimize light settings and create a variety of effects.

Flash, also known as strobe or speed light, helps to create adequate exposure in low-light conditions. It is also useful in light-abundant situations. For example, ﬂash can be used in compensating the exposure of a subject’s shadow or capturing clearly both the subject and the background in backlit conditions.

Before correction

After correction

The model number of a ﬂash refers to the ﬂash’s power, and the maximum amount of light created is represented by a value known as a “guide number.” The bigger the guide number, the more light is emitted from the ﬂash. The guide number is achieved by multiplying the distance from the ﬂash to the subject and the aperture value when the ISO sensitivity is set to 100.

Guide number = Flash to Subject Distance X Aperture value

Aperture value = Guide number / Flash to Subject Distance

Flash to Subject Distance = Guide number / Aperture value

Therefore, if you know the guide number of a ﬂash, you can estimate an optimum ﬂash to subject distance when setting the ﬂash manually. For example, if a ﬂash has a guide number of GN 20 and is 4 meters away from the subject, the optimal aperture value is F5.0.

EV-NX200ZBABEE, EV-NX200ZDABME, EV-NX200ZBABSE, EV-NX200ZBABCH, EV-NX200ZBABHU 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.