Question all.

My fiance has been taking some photos with the 17-70mm lens. Now I have a question when the lens has the small lens hood on and when the flash is used at 17mm there is a round black shadow at the bottom of every shot.

Now I haven't had time to test or upload photo's but my thoughts are the flash is hitting the hood causing the shadow.

Now quickly I took the lens hood off and the shadow is gone and only tiny on some pics.

Is this because the flash hits the lens hood at 17mm? I will try and get photos up later.