There are also the Audx M1245 or M1290. They are the smallest condenser mics available. They do not have active cables, but they are so small that you don't need them!
The M1245, the smallest of the 2 is about half the size of your pinky finger. The M1290 is about the size of your ring finger.
I was quite impressed with them! They are also much more affordable than the Schoeps/Neumann/DPA/MBHO mics that are mentioned.
Granted they don't have the same specs as the "high end" mics, for a starter set of stealth mics, these are fantastic. I have samples if interested
Phil