Now I've read the whole thread, but I just wish I could digest all that valuable information! "JPEG compression ratios" and all that other stuff really throw me. It's a shame that after two or so years of taking caudate photos, I remain "photo illiterate"
I simply insist on you giving me a private lesson in Ireland someday -- or better yet, have you over to Japan to exchange photography lessons for a grand tour of Cynops habitats
Sadly, I seem to be having some problems with my Canon Rebel these days -- not getting the same quality photos I did before, slower focusing compared with one I saw in a shop the other day (though it had a different lens). I think the camera is need of a professional checkup. It's not at all surprising considering the punishment I've put it through -- dropping it several times and exposing it to some pretty rough environments.
For now, I think I'll try taking photos in RAW format, if my camera allows it, and converting them to JPEG photos using my ACDSee software, if that can be done.
Anyway, I'm very much looking forward to seeing those ensicauda pics!