The new AF-I/S Nikon teleconverters (TC-14E & TC20E) generally have an excellent reputation when used on the lenses they were designed for. I use the older 2x converter (TC-300) on the 400/3.5 with quite satisfying results. This leads to 2+ questions. The Internet so far couldn't give me the answers.

1) How does the TC-20E perform on the (older) AI/S lenses, and more specifically: on the 400/3.5 ? Could anyone compare the performance of the TC-20E with the TC-300/1 ?

2) I read somewhere that the TC-xE's include an electrically powered 'floating element', that ensures the ultimate optical correction on modern lenses. Is this true? Is there a 'default' setting for this element when the TC is used on older camera's ? (If not, you would expect that the TC has a variable performce!!)

Thanks for your input,

-- Albin Hunia (a.hunia@dlg.agro.nl), November 29, 2000

Answers

AF-I teleconverters must be modified before thay can be used on AI/S lenses. In the original state they will mount only on those AF lenses equiped internal motors.

AF-I teleconverters do not have internal floating elements. All elements are fixed.

-- Chuck Fan (chaohui@msn.com), November 29, 2000.