I've never gotten very good results using a scanner. The main problem is poor contrast. Also, the lack of lighting control usually results in results that are not quite right. For examples of what we've done with a scanner see http://www.the-rna.com/medals.php. Click on each medal to see a larger image. For imageing the entire coin I'm using a Canon 5D with a Canon EF 100mm F2.8 Macro USM lens. This gives great results for 1x magnification. I also want to capture small details on a coin. I'll need between 4x and 10x magnification to capture features about the size of the date on a coin. And between 20x and 40x to capture the detail of a small letter on a coin. For example, the words "In God We Trust" on a dime. Thanks, Tim On Sat, 2007-03-17 at 20:22 +0000, editor@xxxxxxxxxxxxxx wrote: > This may not be your cup of tea, but flatbed scanners do a fabulous > job with scanning coins and other flat objects. > > Consider this: at 1200dpi you would be able to enlarge it 400% @ > 300dpi > And at 2400dpi, you would be able to enlarge it 800% @ 300dpi > > You should be aware that the light in the scanner will "light" your > subject at approx a 45 deg angle to the plane of focus so you will > have to learn which direction the scanner light "falls" on your > subject. At the very least, you might want to give it a try. YMMV. > > Cheers > J Michael Sullivan > > > > > > >-----Original Message----- > >From: Tim Corio [mailto:tcorio@xxxxxxxxxxxxxxxx] > >Sent: Saturday, March 17, 2007 05:38 PM > >To: 'List for Photo/Imaging Educators - Professionals - Students' > >Subject: Rochester Resources for macro equipment > > > >Is there a good source in the Rochester, NY area for good used > >photogrpahy/microscopy equipment? Hopefully a place where I can also > >get some selection advice. > > > >I'm photographing coins using a standard macro lens (Canon EF 100mm > F2.8 > >Macro USM) on a Canon 5D body. This is working great for 1x > >magnifications. I also want to get magnifications from about 4x to > 40x. > >I've decided the most flexable way to accomplish this is to mount a > >microscope objective on a bellows. > > > >All the equipment I need is available online. But, since this is all > >new to me I would preffer to handle and inspect the pieces and > >hopefully get some advice before I buy. > > > >Is there a source in the Rochester, NY area for used equipment? The > >things I'll be needing are microscope objectives, a t-mount to RMS > >(microsope abjective lens mount) adapter, bellows, and possibly > t-mount > >extension tubes. > > > >I'm in the middle of a project photographing the collection of the > >Rochester Numismatic Association (RNA). Our web site is at > >http://www.the-rna.com. > > > >Thanks, > >Tim Corio > > > >
