Every photographer I know uses the term "macro" to mean "micro". Howcome?
Every scientist I know uses the term "macro" to mean "large". I know why
this is so. Because that's what it means. Shouldn't a "macro" lens mean
one that shot pictures of big things?
I mean (he said with a Jerry Seinfeld twang): You use a Micro Nikkor to
shoot a Macro shot? What's with THAT?
How DID this start?
Blame bad Japanese linguists, who came up with the "Micro-Nikkor" forty years ago.
And what are you doing? Shooting large images of small things? Or normal-sized images of things of no particular size? Is the image the actual film or the print? Is the thing photographed being magnified? Is it magnified on film or only after enlargement to print? etc. etc. etc. We have to define our terms.
As a general rule, microphotography means photography of really tiny things; by extension, it has come to signify the creation of images at a size larger on the film (plane) than in real life. For example, you can use a microscope with an attached camera to make magnified images at 10x, 200x, whatever, to the physical limits of light particles and wavelenghts (Then you use electrons instead of photons)... If you make a 10x image on film and then print the image at 8x10 inches, you end up with a huge magnification...in relation to the size of the original object.
Macro has come to mean photography very close up. The macro range is generally understood to be 1/3 life-size to 1:1 on the film (plane)... which is to say that, for example, a detail of a ruler photographed at 1:1 ratio would be represented on the film at a size equal to that of the ruler, and could be used itself as a ruler. Beyond that magnification, we start to enter the realm of microphotography.
Now, with the tiny CCDs in our cameras, are we really engaged in micro or macro photography? Since the "native" view of such images is a 15 or 17 or 19-inch monitor, what is the magnification? Do we talk in terms if image size vis-à-vis the ½" CCD? or vis-à-vis the viewed image? Is this micro or macro photography?
A case can be made for either definition. A logical --and generally accepted-- definition for "macro" in digital photography has yet to be drafted. Perhaps this is something we could play with.
regards
Robert Jeantet