You buy something (in this case a HP 315 digital camera) and later wish it did something else(had an optical zoom) but later find out that you could have added that feature (via a tiffen lens adapter) but now that you've waited so long/didn't know the camera is too old and now your sitting on ebay, praying no one else is in the situation you are and runs up your bid. But the closing date is days away and you just know its going not to happen?