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Canon has announced a new powerful on-camera flash unit with a xenon bulb for consistent output and a rechargeable Li-ion battery that will enable up to 335 flashes per charge. Designed for professionals and advanced amateurs, the Canon Speedlite EL-1 provides a Guide Number of 197' at ISO 100 and 200mm, which is comparable to that of the 600EX II-RT Speedlite.