in the Distance-priority, Manual and Repeating flash modes

■Calculating the correct aperture

Determine the guide number by referring to the guide number table. The correct guide number depends on the flash output level and zoom position. Next, calculate the correct aperture by using the equation below. The correct aperture depends on ISO sensitivity and shooting distance (m/ft.).

f/stop (aperture) = Guide number (GN at ISO 100; m/ft.) × ISO sensitivity factor ÷ Shooting distance (m/ft)

For example, for an ISO sensitivity of 400 (or ISO sensitivity factor: 2), with the zoom position adjusted to 28 mm, and the flash output level set to M1/1:

Referring to the guide number table, determine the guide number as 30/98.4 (m/ft.). When the shooting distance is 4 m (13.1 ft.), the correct aperture value is:

30/98.4 (GN at ISO 100, m/ft) × 2 (ISO sensitivity factor for ISO 400) ÷ 4/13.1 (shooting distance; m/ft.) = 15 (aperture)

•Set the smaller aperture value (larger f-number) than calculated above on the camera.

■Obtaining the correct flash output level

When the shooting distance and aperture are fixed, calculate the guide number (GN at ISO 100; m/ft.) by using the equation below, based on shooting distance and aperture:

Guide number (GN at ISO 100; m/ft.) = Shooting distance (m/ft) × Aperture (f/) ÷ ISO sensitivity factor

Referring to the guide number table, determine an appropriate flash output level corresponding to the guide number obtained above, then set the same value on the SB-900. For example, for the shooting distance of 6 m (19.7 ft) with an aperture of f/8 and the ISO sensitivity of 400 (ISO sensitivity factor: 2):

6/19.7 (shooting distance; m/ft.) × 8 (aperture value) ÷ 2 (ISO sensitivity factor of ISO 400) = 24/79 (GN at ISO 100; m/ft.)

•When the zoom position is adjusted to 35 mm, set M1/2 flash output level on the SB-900, which can be obtained from GN 24/79 (m/ft.) corresponding to the zoom position of 35 mm referring to the guide number table.

•In Distance-priority manual flash operation, the correct flash output level is automatically determined by the SB-900 according to the shooting distance, aperture and ISO sensitivity that are set.

■Calculating the shooting distance

Determine the guide number by referring to the guide number table. The correct guide number depends on the flash output level and zoom position. Next, calculate the shooting distance by using the equation below. The shooting distance (m/ft.) depends on ISO sensitivity and aperture.

Shooting distance (m/ft.) = Guide number (GN at ISO 100; m/ft.) × ISO sensitivity factor ÷ Aperture (f/)

D

Flash modes and functions

D–23

Page 72 Page 74
Page 73
Image 73
Univex SB-900 user manual Distance-priority, Manual and Repeating flash modes, Calculating the correct aperture
Page 72 Page 74

SB-900 specifications

The Univex SB-900 is a state-of-the-art commercial mixer designed to meet the diverse needs of kitchens that require efficiency and versatility. Built with commercial-grade materials, this mixer is ideal for bakeries, restaurants, and catering services. One of its key features is its powerful motor, which allows the SB-900 to effortlessly handle a wide range of mixing tasks, from kneading bread dough to whipping cream.

A standout characteristic of the SB-900 is its sleek and robust design. Constructed with stainless steel, it not only provides durability but also ensures easy cleaning and maintenance. This high-quality build makes the mixer resilient against the rigors of daily kitchen use while also enhancing its aesthetic appeal.

The SB-900 comes equipped with a variety of attachments, including a whisk, dough hook, and flat beater, making it adaptable for different recipes and tasks. These attachments are designed to work harmoniously with the mixer's powerful motor, ensuring consistent results whether mixing batters, doughs, or sauces. The bowl lift mechanism allows for easy adjustments to accommodate different bowl sizes, optimizing the mixing process.

Another significant feature of the Univex SB-900 is its user-friendly controls. With a simple interface, operators can easily adjust the mixing speed to suit their needs. The mixer offers multiple speed settings, providing the flexibility to achieve the desired consistency without overmixing, thus preserving the quality of ingredients.

Safety is also a priority in the design of the SB-900. It includes built-in safety features such as a motor overload protection system, which helps to prevent damage to the mixer and ensures safe operation. These safeguards make it a reliable choice for busy kitchens.

Furthermore, the Univex SB-900 is designed for ease of use. The easy-to-remove bowl and attachments facilitate quick changes between tasks, enhancing productivity in a fast-paced environment. The mixer’s compact design ensures it fits easily on countertop spaces while still providing ample mixing capacity.

Overall, the Univex SB-900 stands out as a versatile and reliable mixer, equipped with advanced technologies and features that cater to the demands of modern culinary professionals. Its combination of power, durability, and user-friendly design makes it an essential tool for any commercial kitchen aiming for efficiency and high-quality food preparation.
Top Page Image Contents