Please keep in mind that any lens, from any manufacturer, has a certain range that is optimum for most photos. To get really sharp results, one needs a lens (zoom or otherwise) that is designed (optimized) for closeups. For instance in my photos I have and use a 60mm prime, a 85mm prime, a 105mm prime and a 200mm prime, all are micror lenses designed specifically for closup photography.
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Ross
http://orchids-ross.blogspot.com/
I don't do most Dendros or large, "floofy orchids". For me it's minis (like Angraecoides), Masdies, Paphs, and others that crept in somewhere along the line. See my orchid list for complete collection (usually not current.)
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