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 <neo.venator.com+p...@gmail.com> 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 > PDML@pdml.net > 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 PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
