Nikon BF-3A Front Mount Cap for TC-14/14B/14E/14E II, TC-17E & TC-20E/E II Teleconverters

Comments about Nikon BF-3A Front Mount Cap:

[...] It is exactly what I needed for my Nikon 2x convertor. Thank you.

Comments about Nikon BF-3A Front Mount Cap:

Did you know that the front Nikon teleconverter cap (BF-3A) is not the same as the Nikon body cap (BF-1A). It is deeper! It (BF-3A) can act as the body cap but not vice versa. That is, BF-1A doesn't fit Nikon teleconverter. It is because the front element of Nikon teleconverter (1.4x, 1.7x and 2.0x) protrudes out at the front. The good thing is that the front element is a concave lens hence if you try fitting a BF-1A on a Nikon teleconverter, it won't scratch it. To set the two front caps apart, BF-3A is grey colour while BF-1A is the usual black colour.

Having said all that, I am not sure why Nikon sells the standard body cap BF-1A. Watch out that most ebayers would only sell BF-1A. I bought a BF-3A from bhphoto and I am completely happy with it.