Looks reasonably sharp to me, but then again: a) I have ridiculously low standards wrt sharpness, and,
b) I'm looking at it on my phone. Cheers, frank --- Original Message --- From: John Celio <[email protected]> Sent: December 12, 2012 12/12/12 To: [email protected] Subject: PESO - I picked Abraham Lincoln's nose I recently bought an inexpensive Cosina 28mm lens from Miserere with the intention of reverse-mounting it on my pile o' extension tubes & stuff (illustrated with a different lens here: http://goo.gl/WcvoZ) to see what could be done with such immense magnification powers. For my first subject, I picked a penny. As luck would have it, Abe's nose was the first thing I saw in my viewfinder: http://goo.gl/Xi8vs That's some serious magnification there. I have no clue how to calculate what the macro ratio is, but there's not much point to it at the moment. I appear to have gone beyond the resolving power of the lens. All the photos I took are very soft, regardless of the aperture I used. This one looks a teeny bit sharp on the nose, but I think that's an illusion. (Reference for those who don't know what a US penny looks like: http://en.wikipedia.org/wiki/US_penny. Note that the article also mentions the size of the coin if you want to try to figure out the scale here.) I'm going to keep playing with this setup, but in the meantime I'll save up for a sharper lens. I wish I could use the lenses I already own, but this experiment has taught me the one downside of DA lenses: not having an aperture ring makes extension ring/bellows shooting very difficult. 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. -- 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.
