With a powerful guide number, and full manual operation, the YN-560 IV Negative Display Manual Speedlite from Yongnuo is an excellent tool for photographers who desire manual control from their lighting equipment. The flash recycles to full power in three seconds, and it has a guide number of 190 at ISO 100. It has a convenient black and white liquid crystal display that makes it very easy to view your adjustments, while the flash head can be rotated up to 97° vertically and up to 270° horizontally. The zoom head is also adjustable from 24 to 105mm and 18mm if using the built-in diffuser. The YN-560 IV runs on four AA batteries that will give you from 100 to 1500 flashes, depending on the selected power. It also can be powered external Yongnuo SF-18C or SF-17C power supplies.
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