Those are important considerations. The main reason is simplicity. I use a double sticky tape and place it on the back of the lens rim. This stuff is really malable and you can form it into strings. The filter is pressed into the tape. Care is taken to make sure I don't use the center of the filter. Then I attach the lens board to the camera. You understand that this is nearly the last step in taking the shot. All the prelim work (composition and focus) have been done. But the main reason is it gets the filter out of the way and won't blow off and get trashed as quickly. I do have to replace filters every so often. I have several lenses that do not share a common thread size. So, lthis is what I came up with. It works for me and I am happy with it.