I have lenses of several different filter diameters and I've been looking at the various step-up ring sets that are available so that I can use a single ND1000 neutral density filter that I plan to purchase, in the 77mm size (the largest diameter lens I have). It seems that all of the step-up ring sets available have varying "to" as well as "from" sizes, e.g. one particular set includes the following converter rings:
What I'd like however is a set with something like the following:
- 55mm-77mm ...and so on.
Why is it that sets such as this don't seem to be available? Is it expected that the user would stack all of the necessary rings in order to arrive at the required conversion?