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Note: Using a Circular Polarizing Filter

*In the case of the FA 77mm f/1.8 Limited lens, attaching certain dis- continued circular polarizing filters (including the PENTAX Type-A Circular Polarizing Filter) prevents the built-in hood from being pulled out.

*With an autofocus camera, use a circular polarizing filter instead of a polarizing filter. A polarizing filter affects the accuracy of the autofo- cus and exposure.

Note: Attaching a Specialized Hood If the PENTAX Type-A Circular Polarizing Filter (discontinued) is attached to the FA 28-105mmf/3.2-4.5AL (IF) lens, you cannot attach the specialized lens hood since it hits the filter's outer edge. Also, attaching a non-PENTAX circular polarizing filter may still prevent the specialized hood from being attached.

PENTAX Circular Polarizing Filters

(Both discontinued)

Type A

Type B

* Type A is thicker than Type B.