Is the filter adapter fixed or variable?

Fixed and variable filter adapter rings should not be directly compared. Neodymium filter is a common photographic accessory, and adjustable neodymium mirror is an adjustable gear. Its advantage is that a filter can adjust different gears, which is more convenient and fast. Compared with the fixed one, the price is relatively low and the cost performance is high. The disadvantage is that the adjustment angle is not easy to control, and it is easy to produce uneven light and shade or color cast. The advantage of fixing is that the picture receives light evenly, and the picture will not be uneven in light and shade. The disadvantage is that there is only one gear, and the capital investment is large.