I’m looking to get into macro photography, does Tiffen make any close-up filters or anything for this?

Yes we have a line of close up filters, or diopter filters,great for nature/macro photography. They come in a set of three filters or you can buy them individually in strengths of +1, +2 and +4. Each close- up filter has dual threads so they can be combined with other types of filters giving you the creative edge for doing some very unique macro photography without getting a specialized lens.