Colin Glover wrote in post #18517238
Polaroid do a set of four 58mm filters that's rated 4* by Amateur Photographer magazine.
The conventional wisdom is that if you have to use close-up filters, find yourself a close-up filter with TWO-ELEMENT optics, not the simply one-lens optics found in almost all commercially available filters. Both Canon and Nikon have offered a two-element close-up filter. The Canon ones come in 52mm, 58mm, and 77mm filter sizes.
From http://www.peachpit.com ...es/article.aspx?p=1804858:
"Double-element close-up lenses. Sometimes called dual-element or achromatic close-up lenses, these lenses have two elements; the second corrects the aberrations of the first. They're more expensive than the single-element version, and not as readily available, but their image quality is excellent. I use a Canon 500D double-element close-up lens with my 85 mm lens, and I can't see a difference in image quality between a photo taken with that combination and one taken with a true macro lens.
Canon makes two double-element close-up lenses—the 250D (+4 diopter) and the 500D (+2 diopter). Nikon made the 3T, 4T, 5T, and 6T double-element lenses, but they've been discontinued (sometimes you can find them on eBay). Schneider also makes double-element close-up lenses, but at a price. Olympus makes the MCON 35, which appears to be discontinued but is still available on eBay."
...and as used products from retailers such as Adorama
Double-element accessory attaches to front of lens, and the Canon 500D changes closest focusing distance from infinity to 500mm (approx. 19.7") from front of lens.