Israeli newspapers have printed photos of Defence Minister Amir Peretz trying to watch military manoeuvres through binoculars with the lens caps still on.
Mr Peretz's popularity has plummeted over the Lebanon war
Mr Peretz was inspecting troops in the Golan Heights with the Israeli army's new chief of staff, Gen Gabi Ashkenazi.
According to the photographer, Mr Peretz looked through the capped binoculars three times, nodding as Gen Ashkenazi explained what was in view.
Analysts say it is a new blow for the embattled defence minister.
Mr Peretz's popularity has fallen in the wake of last year's war against Hezbollah militants in Lebanon.
But one Israeli paper pointed out that he is not the first prominent official to make this mistake.
According to daily Yediot Ahronot, US President George W Bush and former Israeli Prime Minister Ariel Sharon have both done the same thing.