dave weldon is the cf's foremost authority on the subject and he recomends the amscope trinocular T 490-A available from ebay seller "precision world" for a buy it now price of $263 or less at auction (current ebay item #400035981150) you can get essentially the same microscope in binocular form for about $ 100 less, however the trinocular is a much better scope for photomicography, which allows you to share images online with other cf members or a vet if you can find one willing to do that, there are similar more powerful microscopes (40-2000x) on ebay in the same price range but stick with 40-1600x you will get a better field of view, another microscope that warrants investigation is the celestron 44340 with low res lcd viewer, but has a built in cam that takes high res pictures,and is available from walmart online for $179 delivered, you can get cheesy microscopes on ebay for as low as $40