Teleconverters.
Warning: fitting a lens with an incompatible TC could damage your lens or TC
201 - TC-201(AiS) - TC-200(Ai) - TC-1(pre-Ai)
301 - TC-301(AiS) - TC-300(Ai) - TC-2(pre-Ai)
14B - TC-14B(AiS) - TC-14(Ai)
o - Teleconverter is usable
v - Vignetting or other image deterioration may occur at close focus or wide apertures
u - Uneven exposure may result at high shutter speed with small aperture
r - Usable if rear filter is removed
a - Autofocus is possible