I've always been interested in macro photography, but I had some questions regarding close-up filters. The lens I'm looking at is the Nikon 60mm f/2.8D Micro. Are close-up filters even worth using? I know that the lens itself will give me a 1:1 reproduction, but I want to take pictures at greater detail. Are there any brands to avoid or are they generally the same? Thanks in advance. FWIW, this is for use on a D70.