2488 frames, stacked best 40%. The avi needed to be split in two, each part stacked, then assembled in autostitch. I converted to greyscale and split the avi using virtualdub.
http://www.autostitch.net for the best mosaic software available for free. Be sure to click on the image to get the full size.
f/15 exposure (prime focus). This works out to a magnification of about 100x, and a scale of 1:4,000,000.