It will take some practice to get used to calibrating and aligning the sweet spot. If you are having difficulty looking through the filter try rotating the filter in front of the camera while looking at your monitor, hope that helps,
Jeff
How can we rotate in front of the camera when we have to rotate it from in side the fillter? All you will be able to see is my finger Do you know of any videos of this so that it my make it a little easier? Thank you