Interesting practical twist. I use my DL with the FA 50mm when we go to family gatherings and Annette was (understandably) afraid that I would scratch some table tops with the hard metal hood. So off came the metal hood and on went an A1 Skylight filter and a soft rubber hood. I need the filter because the rubber hood doesn't protect the front lens element from fingers and other objects as the deep metal one does. As for filter flare, if I find myself in the right conditions I will remove the filter.
Sometimes practical matters have to supersede ultimate image quality.
Riverview, NB, Canada
Pentax *istDS, K3:
FA 50 f1.4, FA 28-70mm f4, Tamron SP 70-200mm f2.8 Di, DA 10-17 f3.5-4.5, DA 14 f2.8, DA 16-45mm f4, DA 18-135mm f3.5-5.6 WR, AF-540FGZ
Olympus E-P5, OM-D E-M1(X2): 9mm to 150mm lenses