B00009UT2T SUNPAK 4000AF Electronic Power Zoom Flash with LCD (SUNPAK 040N)

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Conserve battery power, the PZ4000AF features a sleep mode
If not fired after a few minutes, the PZ4000AF goes into a standby mode
LCD panel displays TTL, manual or fill flash modes
Flash will power zoom in-sync with camera lens’ focal point, on selected camera models