Pentax 6x7 Manual page 6

67 lenses are high precision optical in-
struments and should be treated accordingly.
Protect them from humidity, salt air and dust ;
do not store them in damp places. It is good
practice to protect the lens with a filter when
using it near the seashore and other loca -
tions where dust or moisture might accumu-
late.
Cleaning: Do not wipe the lens with a hand -
kerchief or other rough cloth which might
scratch the surface. Use only a rubber blower
or soft brushes especially designed for lens