Pretty neat abstracts! I must try and do some more macro photography. Some years ago I tried some of a wafer, using the K10 and sigma 180mm macro plus extension tubes.
This is the wafer http://www.pbase.com/wendybeard/image/111769543 and this is what I got http://www.pbase.com/wendybeard/image/111757295 and a crop of one of the die http://www.pbase.com/wendybeard/image/111757296 Wendy On Tue, Jan 1, 2013 at 10:58 AM, Bruce Walker <[email protected]> wrote: > Pretty cool, John. Ruler-wise you can't see the forest for the trees, > but they yield very abstract, intriguing images. > > > On Mon, Dec 31, 2012 at 9:40 PM, John Celio > <[email protected]> wrote: >> I shot a couple photos of a metric ruler just now. For anyone >> wondering what the magnification of that super-crazy macro setup of >> mine can do, here they are: >> >> http://www.flickr.com/photos/26065300@N00/8332245842/ >> Pentax FA 50mm f1.4 (at f5.6) reverse mounted on my pile o' extension >> tubes. Field of view is a bit more than 4mm. Let's play it safe and >> say 4.2mm. >> If I've done the math correctly (K-5 sensor is 23.4mm wide), this >> means it has a magnification ratio of 5.57:1 >> >> http://www.flickr.com/photos/26065300@N00/8331187951/ >> Cosina 28mm, same setup as above. FoV is a bit more than 2mm. I'm >> guessing 2.2mm. >> Again, if my math is right, magnification ratio of 10.6:1 >> >> Wow! >> >> The 50mm seems to produce somewhat sharper images, so I'll probably >> use that lens for this sort of stuff until I find a really, really >> (really) good 28mm lens someday. Magnification like this needs >> something sharp as a razor, apparently! >> >> John >> >> -- >> PDML Pentax-Discuss Mail List >> [email protected] >> http://pdml.net/mailman/listinfo/pdml_pdml.net >> to UNSUBSCRIBE from the PDML, please visit the link directly above and >> follow the directions. > > > > -- > -bmw > > -- > PDML Pentax-Discuss Mail List > [email protected] > http://pdml.net/mailman/listinfo/pdml_pdml.net > to UNSUBSCRIBE from the PDML, please visit the link directly above and follow > the directions. -- Wendy Beard Carp, Ontario Canada -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
