Name Manufacturer / Model	Mount Bayonet	Type Category	Year Released	Focal mm	Aperture f/	Weight g
HasselbladHC 80mm F/2.8 Fujinon	HASSELBLAD H	Prime	2002	80mm	f/2.8	—
HasselbladHCD 24mm F/4.8	HASSELBLAD H	Wide	2012	24mm	f/4.8	810g
HasselbladHCD 28mm F/4	HASSELBLAD H	Wide	2006	28mm	f/4	850g
HasselbladHCD 35-90mm F/4-5.6 ASPH	HASSELBLAD H	Zoom	2008	35-90mm	f/4	1410g
Helios-81N 50mm F/2 MC	NIKON F	Portrait	1978	50mm	f/2	215g
IrixBlackstone 11mm F/4	NIKON F+ CANON EF, PENTAX K	Wide	—	11mm	f/4	—
IrixBlackstone 15mm F/2.4	NIKON F+ CANON EF, PENTAX K	Wide	—	15mm	f/2.4	—
Itorex50mm F/40 Pan Focus	T MOUNT	Prime	—	50mm	f/40	60g
Jupiter-21A 200mm F/4	T MOUNT	Telephoto	1968	200mm	f/4	740g
Jupiter-37A 135mm F/3.5	T MOUNT	Telephoto	—	135mm	f/3.5	410g
Jupiter-37A 135mm F/3.5 [MC]	T MOUNT	Telephoto	—	135mm	f/3.5	410g
Kaleinar-5N 100mm F/2.8 MC	NIKON F	Telephoto	1983	100mm	f/2.8	380g
Kalimar300mm F/5.6 Mirror	T MOUNT	Mirror	—	300mm	f/5.6	207g
Kelda500mm F/6.3 Mirror DX	T MOUNT	Mirror	—	500mm	f/6.3	597g
Kenko35mm F/4 Soft MC	T MOUNT	Wide	1996	35mm	f/4	—
Kenko400mm F/8 Mirror MC	T MOUNT	Mirror	2012	400mm	f/8	340g
Kenko400mm F/8 Mirror MC N II	T MOUNT	Mirror	2017	400mm	f/8	500g
Kenko400mm F/8 Mirror MC N II S	T MOUNT	Mirror	2021	400mm	f/8	500g
Kenko45mm F/4.5 Soft MC	T MOUNT	Prime	1995	45mm	f/4.5	210g
Kenko85mm F/2.5 Soft MC	T MOUNT	Telephoto	1987	85mm	f/2.5	340g
KenkoMIL TOL 200mm F/4	T MOUNT	Telephoto	2015	200mm	f/4	670g
KenkoMIL TOL 400mm F/6.7 ED	T MOUNT	Telephoto	2015	400mm	f/6.7	1560g
KenkoMIL TOL 400mm F/8 Mirror MC	T MOUNT	Mirror	2012	400mm	f/8	340g
KiyoharaKogaku 50mm F/4.5 Soft	T MOUNT	Prime	1987	50mm	f/4.5	125g
KiyoharaKogaku 50mm F/4.5 Soft [VK50R]	T MOUNT	Prime	1987	50mm	f/4.5	125g
KiyoharaKogaku 70mm F/5 Soft	T MOUNT	Prime	1986	70mm	f/5	136g
KiyoharaKogaku 70mm F/5 Soft [VK70R]	T MOUNT	Prime	1986	70mm	f/5	136g
Kowa110mm F/5.6	KOWA SIX	Telephoto	—	110mm	f/5.6	680g