AF Teleconverters	Elements-Groups	Diameter x Length (mm)	Weight (g)
HD DA 1.4X	4-3	65 x 20	126

SMC Teleconverters	Elements-Groups	Diameter x Length (mm)	Weight (g)
A 1.4X-S	5-4	65 x 22	145
A 1.4X-L	5-5	66 x 29	175
F 1.7X AF	6-4	64 x 26	135
A 2X-S	7-6	65 x 39	210
A 2X-L	6-5	66 x 63	255
T6-2X	6-5	63 x 28	142

Non-SMC Teleconverters	Elements-Groups	Diameter x Length (mm)	Weight (g)
CPC 2X	4-3	62 x 32	unknown
Takumar-A 2X	4-3	60 x 25	113

Prototype Teleconverters	Elements-Groups	Diameter x Length (mm)	Weight (g)
ST-2X	unknown-unknown	unknown x unknown	unknown