Quote Originally Posted by BrianShaw View Post
That is a really good article, Jac... thanks. I didn't really learn anything new but it is well written and accurate. I wish I had read that years ago when I figured out Series filters.

To the OP. If you buy online consider looking up an ebay seller named "Macintoshcat" or something similar. He is a good guy and is quite affordable; I've bought from him several times and he has great feedback. He also sells his adapters with the retaining ring. Some other sellers do not include the retaining ring and charge twice as much since you have to buy them separately. Suggest you pay attention tot he lens hood option for retaining the filter... it is well worth the extra expense.
Great advice on macintosh cat on eBay. He is selling me a Tiffen 45.5mm adapter for series 6, and will adjust it slightly to fit, since I really need 44.5mm. Thanks to you and the others who replied to help educate me on all this!