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<blockquote data-quote="WayneF" data-source="post: 174830" data-attributes="member: 12496">I don't know if &quot;macro rings&quot; means close up filters or extension tubes, but the real genuine macro lens will always be a full class above anything else.&nbsp; Both in sharpness and versatility.Close up filters.&nbsp; comes in strengths, like +2.&nbsp; That means it focuses at 1/2 meters, if the lens is focused to infinity.&nbsp; So it will focus closer.&nbsp; However, it cannot make the edges of the field sharp, and it it really needs to be stopped way down (like to f/11 say) to try to improve sharpness.Extension tubes.&nbsp; goes behind the lens to extend its focal length, but then it only focuses close.If you put a 50 mm extension on 50mm lens, it should approach 1:1 (like your macro lens already does).&nbsp; If you put a 50mm extension on a 300 mm lens, the effect becomes rather small.&nbsp; Better than nothing maybe, but not better than the macro lens.</blockquote>

[QUOTE="WayneF, post: 174830, member: 12496"] I don't know if "macro rings" means close up filters or extension tubes, but the real genuine macro lens will always be a full class above anything else. Both in sharpness and versatility. Close up filters. comes in strengths, like +2. That means it focuses at 1/2 meters, if the lens is focused to infinity. So it will focus closer. However, it cannot make the edges of the field sharp, and it it really needs to be stopped way down (like to f/11 say) to try to improve sharpness. Extension tubes. goes behind the lens to extend its focal length, but then it only focuses close. If you put a 50 mm extension on 50mm lens, it should approach 1:1 (like your macro lens already does). If you put a 50mm extension on a 300 mm lens, the effect becomes rather small. Better than nothing maybe, but not better than the macro lens. [/QUOTE]

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