Pentax 6x7 - Accessory Filters; Front Lens Filter Attachment

_ ACCESSORY FILTERS _____________ •
Filters Attaching to the front of the lens
The 55mm f/ 4 lens uses 77mm screw-in
filters that fit the threads on the front of the
lens. In addition, the spring-type lens hood
for this lens may be attached over the filter .
The
75mm lens, the standard lens, and
telephoto lenses through 300mm focal length
accept bayonet
mounting filters of different
sizes. These filters attach to the front rim of
the lens via two bayonet tabs.
In
the case of the 90mm and 105mm lens,
as well as the 135mm and 150mm lenses,
the respective lens hood may be mounted
over the filter.
Except
for the polarizing filter , use of two
filters together is not recommended.
Filters Attaching to the Rear of the Lens
.Telephoto lenses from 400mm through
1000mm (except the 500mm lens) are de-
signed
to accept both 77mm 67 bayonet
filters and
77mm Pentax screw-in filters (SMC
Pentax
M* ED (F) 800mm f/ 6.7 via a filter
frame). Both types
mount to the rear of the
lens. Before
mounting either, the filter
adaptor ring which is housed in the lens
mount will