Uh fat16lib, thank you!
First at all, congratulations for the picture, very well taken. You're probably an enthusiast photographer as well.
As for my setup, while at first failing on the pin 10 connection (WAS mistakenly wired to pin number 4) is NOW perfectly resembling your* and, not surprisingly, it finally works!
(*) Except for colors, but Arduino works on a 10bit basis, and I assume it will see on gray levels anyway 
So, shame on me but good to be reported for further references, and to make sure no one will be stressed on the same point.
- Card readers have to be buffered. Don't ask me why, but make sure there's a little extra component between an Arduino port and the microSD card whatsoever. Spare much frustration and get that reader.
- IF you connect your microSD board straight onto Arduino, pin have to be 10-11-12-13 while some examples specifically set pin 4 as chipSelect (ReadWriteSdFat is among those). Forget pin number 4, that's apparently to be used with some other shields on the way; make sure to connect 10~13, set up the code properly and off you go.
- Have a beer.