You say "Microphotography is greater than 1:1 magnification..." Unless you are shooting a Nikon. IIRC, what the rest of the world calls "macro", Nikon calls "micro." Like Paul says, it doesn't matter what you call it. "Macro" or "micro" is anything shot very close to the subject using close-up filters, extension tubes, bellows, or special purpose close-focus lenses. Many zoom lenses used to claim a "macro" capability even though they couldn't achieve more than 1:3.5 or so. IMHO, the important thing with macro is not the precise ratio of image-size-on-sensor to actual object size; rather, it is about isolating a very narrow aspect of the environment using a good combination of close-focus and appropriate DOF. It is about art, not about science and ratios and image size. Adam's definition in terms of 1:2 to 1:1 ratios is generally accepted usage of the macro term, but it is a general convenient rule-of-thumb, not a hard and fast rule.
stan On Apr 29, 2007, at 10:10 PM, Adam Maas wrote: > Macro is in the 1:2 to 1:1 range. Your Tamron does 1:2 (half life- > size) > without the dedicated extension tube. > > Microphotography is greater than 1:1 magnification. But that generally > requires bellows or a reverse mounted lens on a macro lens rather than > just a macro lens. > > -Adam > > Jens Bladt wrote: >> I have photographed my Stanley measuring device with a >> Pentax K10D and a Tamron SP 2.5/90mm lens - at closest possible >> focusing >> distance; 0.39 m. Is this macro? >> http://www.flickr.com/photos/bladt/477746425/ >> >> Maybe not. My sensor is 23.5mm. This image covers appr. 47mm. This >> means >> it's almost accurately half natural size - 50% on the sensor. >> Isn't macro photography supposed to be enlarging the subject? >> On a computer screen my 3872 pixel would look like 1366 mm. That's an >> enlarement of appr. 2900% (almost 30 times). >> But enlarging the copies (negs) is not really macro, is it? >> >> Jens Bladt >> >> http://www.jensbladt.dk >> >> >> >> No virus found in this outgoing message. >> Checked by AVG Free Edition. >> Version: 7.5.467 / Virus Database: 269.6.2/779 - Release Date: >> 04/28/2007 >> 15:32 >> >> > > > -- > PDML Pentax-Discuss Mail List > [email protected] > http://pdml.net/mailman/listinfo/pdml_pdml.net -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net
