Name Manufacturer / Model	Mount Bayonet	Type Category	Year Released	Focal mm	Aperture f/	Weight g
Seikanon28-80mm F/3.5-4.5 MC	PENTAX K	Zoom	—	28-80mm	f/3.5	—
Seimar28-70mm F/3.5-3.8 MC Auto	PENTAX K	Zoom	—	28-70mm	f/3.5	—
Sigma10-20mm F/3.5 EX DC HSM	PENTAX K	Wide	—	10-20mm	f/3.5	520g
Sigma10-20mm F/4-5.6 EX DC	PENTAX K	Wide	—	10-20mm	f/4	—
Sigma10-20mm F/4-5.6 EX DC HSM	PENTAX K	Wide	—	10-20mm	f/4	470g
Sigma100-300mm F/4 APO EX DG	PENTAX K	Telephoto	—	100-300mm	f/4	—
Sigma100-300mm F/4 APO EX DG [HSM]	PENTAX K	Telephoto	—	100-300mm	f/4	—
Sigma100-300mm F/4 APO EX IF	PENTAX K	Telephoto	—	100-300mm	f/4	—
Sigma100-300mm F/4 APO EX IF [HSM]	PENTAX K	Telephoto	—	100-300mm	f/4	—
Sigma100-300mm F/4.5-6.7 DL ZEN	PENTAX K	Telephoto	—	100-300mm	f/4.5	—
Sigma100-300mm F/4.5-6.7 UC ZEN	PENTAX K	Telephoto	—	100-300mm	f/4.5	—
Sigma105mm F/2.8 EX DG Macro	PENTAX K	Macro	—	105mm	f/2.8	460g
Sigma105mm F/2.8 EX DG OS HSM Macro	PENTAX K	Macro	—	105mm	f/2.8	—
Sigma105mm F/2.8 EX Macro	PENTAX K	Macro	—	105mm	f/2.8	—
Sigma10mm F/2.8 EX DC HSM Diagonal Fisheye	PENTAX K	Fisheye	—	10mm	f/2.8	475g
Sigma10mm F/2.8 EX DC HSM Fisheye	PENTAX K	Fisheye	—	10mm	f/2.8	—
Sigma12-24mm F/4.5-5.6 DG HSM II	PENTAX K	Wide	—	12-24mm	f/4.5	—
Sigma12-24mm F/4.5-5.6 EX DG ASPH	PENTAX K	Wide	—	12-24mm	f/4.5	—
Sigma12-24mm F/4.5-5.6 EX DG ASPH HSM	PENTAX K	Wide	—	12-24mm	f/4.5	600g
Sigma120-400mm F/4.5-5.6 APO DG [OS] HSM	PENTAX K	Telephoto	—	120-400mm	f/4.5	—
Sigma120-400mm F/4.5-5.6 APO DG HSM	PENTAX K	Telephoto	—	120-400mm	f/4.5	—
Sigma120-400mm F/4.5-5.6 DG HSM	PENTAX K	Telephoto	—	120-400mm	f/4.5	1640g
Sigma135-400mm F/4.5-5.6 APO DG	PENTAX K	Telephoto	—	135-400mm	f/4.5	—
Sigma135-400mm F/4.5-5.6 APO RF ZEN	PENTAX K	Telephoto	—	135-400mm	f/4.5	—
Sigma14mm F/2.8 EX ASPH HSM	PENTAX K	Wide	—	14mm	f/2.8	—
Sigma15-30mm F/3.5-4.5 EX DG ASPH IF	PENTAX K	Wide	—	15-30mm	f/3.5	—
Sigma150-500mm F/5-6.3 APO DG [OS] HSM	PENTAX K	Telephoto	—	150-500mm	f/5	—
Sigma150-500mm F/5-6.3 APO DG HSM	PENTAX K	Telephoto	—	150-500mm	f/5	—