Nikon AF-S TC-20E III - Manual (Page 13)

En
13
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Nomenclature
1 Teleconverter-camera index
(p. 17)
2 Minimum aperture signal post
(EE servo coupling post)
3 CPU contacts (p. 19)
4 Lens mounting index (p. 16)
5 Lens release lever (p. 16)
6 Meter coupling lever
7 Maximum aperture coupling ridge
( ): reference page