This PRO filter has an even smaller frame than the PRF-D37.
With its black rimmed glass it provides a clear view and protects the actual lens from unintentional scratches.
The PRF-D37 PRO is multi-coated and fits to the following lenses:
M.Zuiko Digital ED 14-42mm F3.5-5.6 EZ
M.Zuiko Digital 14-42mm F3.5-5.6 II
M.Zuiko Digital 14-42mm F3.5-5.6 II R
M.Zuiko Digital 45mm F1.8
M.Zuiko Digital 17mm F2.8 Pancake