wrote:

Having controlled my "megapixel jealousy," let me suggest
a very easy field-expedient extreme close-up adapter: An
ordinary large magnifying glass. :-)

I do closeups the old-fashioned way with my Digital Rebel,
using an extension tube to hold the lens farther away
from the sensor than it would otherwise sit. With such
gear it's easy to blow up an individual component (or
coax connector, or coin, or whatever) to fill the entire
frame.

Never found any EOS-mount extension tubes, so I use an
EOS-to-M42 adapter and my screwmount Pentax lenses and
extension tubes. The Pentax lenses work really well on
a DSLR for general photography, though you have to run
the camera fully manually when you do.

Laura Halliday VE7LDH "Que les nuages soient notre
Grid: CN89mg pied a terre..."
ICBM: 49 16.05 N 122 56.92 W - Hospital/Shafte