fecal microscopy
not to wave my own flag but i have several years of reptile fecal photomicroscopy as well as other types of microscopy.
i have researched almost every suitable scope under $1000 and have owned several different scopes. in fact i am in the process of buying a new scope. if you want to post or pm your budget, i will be glad to make some recommendations. i would proceed cautiously, buying a scope that is not all that conducive to fecal microscopy is a common mistake first time around.
marginally suitable scopes can be had for less than a $100, but imo you are better off if you could go around a $170. in addition you will need fecasol (fecal float solution), for just starting out you will also need fecalizers, it can be done in a testube but imo fecalizers are probably easier for the beginner. you will also need a box of blank slides, some cover slides, a chart or book of reptile pathology. a collection of pipettes, syringes and needles dont hurt either.
but before you invest you should understand that just having a book or chart of pathology does not necessarily make one qualified to do fecal floats, at least not and get reliable results. it takes practice to properly read fecal floats/smears. i would strongly recommend the ability for photo microscopy because then you can post or pm your results to to get other opinions, you could even share them online with your vet. it doesnt necessarily cost any more to do photomicroscopy, depending on choice of scope.
also another point that imo should not be overlooked, is that you are dealing with pathogenic organisms, most are easily transmissible to humans, so a knowledge of proper handling/sanitization protocol would be a good thing to study before beginning. some reptile pathogens are even capable of entering through the skin. so, imo a little study, practice, advance knowledge and common sense probably not a bad idea either.
you can get small qtys of fecasol and most other supplies through the
http://www.beautifuldragons.com/Reptilestore.html
larger qtys can be had through most biological supply houses.
fecasol and fecalizers as well as slides/cover slides can also usually be had on ebay.
celestron has a good selection of reasonably priced photomicroscopy scopes including 44320,44325,44326,/// the ldm(liquidcrystal display module) lcd scopes like the 44340 is a common recomendation in the $175 price range (the factory listed prices are not realistic), the 44345 is a nicer scope but for $265 you can get an amscope t490A, a well built high quality scope capable of extreme high quality images but photo microscopy would be extra. if you are really serious and $ isnt a huge issue imo, your 2 best choices would be a celestron pentaview $389(my next scope ) or an amscope t490A $265 available from ebay seller precision world, which is a square trade dealer so you can get a greatly extended warranty for cheap.
http://www.celestron.com/science_education/microscopes.html?p=2
ebay is a great place to window shop scopes, but beware the cheaper scopes that are clones of the amscope t490A that look almost identical but they are made in india and have several negative issues, hope that help clear things up. jmo
ps the beautiful dragons store has a laminated color chart of the most common reptile pathogens for $6/// now you know, but i dont want no chocolate suprizes while i am sleeping lol.