Tamron Adapt-A-Matic 70-220mm F/4 Model PZ-30Au: This lens was available in three versions. We are not sure if the PZ-30Au model name applies to all three versions. Initially there was the first model which featured metal knurled focus and zoom rings. Then there was a subsequent model which featured rubber focus and zoom rings yet still did not have slots on the aperture ring for the aperture coupling band included with later versions of some Adapt-A-Matic mounts. The final version of this lens features rubber focus and zoom rings plus the slots for aperture coupling bands.

Lens Specifications:

Lens Model	PZ-30Au
Focal Length	70-220mm
Aperture Range	f/4.0 — 22
Angle of View	34°~11°
Optical Construction (Groups / Elements)	11 / 14
Min. Focus from Film Plane	79" (2.0m)
Macro Mag. Ratio	—
Filter Size	67mm (front)
Diameter	2.8" (71mm)
Length at [w/Nikon mount]	[7.4" (189mm)]
Weight	37.6 oz. (1065g)
Lens Hood	Built-in
Accessory	—