ricardopt
You are correct, when using anamorphic mode you only get a crop of the sensor. In fact, the only mode that gives you full sensor picture is mv1080p varieties, all other modes only read a part of the sensor, hence what you call a zoom in effect. The difference between 1x1 and 1x3 (anamorphic) modes is that the latter is able to capture a larger part of the sensor. With 1x1 mode you get around x3 crop, with 1x3 you get around x1.5-1.6 (crop depends on the resolution chosen, the higher the res, the larger the crop, the smaller the crop factor).
Does it make sense?