Pentax 21760, 21717, 21740, 21580, 21660, 21650, 21507 manual Yes

38

	Circular polarizing filter		Circular polarizing filter
Lens		(A type)		(B type)
	Compatibility	Notes	Compatibility	Notes
		*Can be mounted and
		used. However, when the
		A type of circular polarizing
DA 16-45mm f/4ED AL	*YES	filter is mounted, the mount	YES
		of the dedicated bayonet
		hood interferes with the
		filter’s mount so it cannot
		be mounted on that.
				Vignetting occurs
DA 17-70mm f/4 AL [IF] SDM	NO		*YES	when the focal
				length is 17mm.
DA 18-55mm f/3.5-5.6 AL ΙΙ		*Can be mounted and
		used. However, when the
DA 18-55mm f/3.5-5.6 AL
		A type of circular polarizing
DA 50-200mm f/4-5.6ED	*YES	filter is mounted, the mount	YES
		of the dedicated bayonet
		hood interferes with the
DA 55-300mm f/4-5.8ED		filter’s mount so it cannot
		be mounted on that.

*1 The lens hood cannot be mounted on some circular polarizing filters that are not produced by PENTAX, depending on the type.

*2 Vignetting occurs at focal lengths below 15mm with other PENTAX filters (such as the Skylight) besides circular polarizing filters.

*3 The dedicated hood cannot be mounted if a filter is mounted on the front of the lens, including circular polarizing filters.