1/4 Plate Alumitype (3.25" x 4.25).

1/4 Plate Alumitype (3.25" x 4.25").

 

I made this 1/4 plate image of a metronome in motion @ adagio under 5500K compact fluorescent bulbs in a cardboard box.  Process used was wet plate collodion.  Lens:  f8 Dallmeyer Rapid Rectilinear (c. 1891).  Exposure time was 1 min. 45 sec.