Not sure what you are trying to prove here by posting an ISO50 image and expect noise?
why not post a ISO6400 pic @ 100% crop and we go from there
nice macro shot btw
Because everyone else has already posted their ISO6400 crap. Isn't it nice to see what the a77 can do, for once, instead of bitching endlessly about what it can't do?
Oh, wait . . . excuse me for butting into a forum thread about a camera body, the exclusive domain of the naysayers. I hereby exile myself back to the field.

Happy sniping, everyone!
