@Vickie, Dave is spot-on. The diameter of the lens/filter will be prefaced by a null sign - for example: ∅52, ∅55, or ∅58 (the most common sizes for kit lenses). So get a set that fit on your lens properly. (Or, better, get one for a 55-300mm zoom or something with a longer focal length - more info on that to follow (discussion on that front will be included on my answer to Dave - see below)).
In this thread:
http://garden.org/ideas/view/e...
there is a link to some step-up/step-down rings that have worked well for me. They're sure handy once you start to fiddle with filters. The section in question is about 15pct into the longer article. Do a search for step-up and it will show up for you.
@Dave, dangit your questions are complicated and are gonna be time-consuming. Stay tuned to this thread (tho I think maybe they deserve their own thread??). I just set up a subject for multiple test shots and will be shooting them this afternoon/evening. Great questions that deserve answers and something I've been thinking about doing it for a while. Good to be pushed...
