A "mouse" in an old violin

From the discussion thread at the via:

"Fritz" lives inside a ~130 year old "Hopf" violin awaiting restoration at the workshop of Noel Sweetman in New Zealand.

Photographed by OP using a Lumix S1R and a specially modified Laowa Probe Lens designed specifically to fit into the end pin block of violins.

Fritz and his home aren't just one photo, but a blend of 47 images, focus stacked to create a sharp image from front to back. This sharpness is what gives the illusion that the space is large, we're used to seeing macro images with a shallow depth of field. 

And this:

That ball of hair is affectionately known to violinists as a “violin mouse”. Even after cleaning many will ask for the mouse to be returned to the instrument for luck.