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Tamron Adaptall-2 35-70mm F/3.5-4.5 Model 09A: A moderate
wide angle to slight telephoto zoom lens with above average optical
performance. Image sharpness is excellent with very good contrast, and
aberrations are very well controlled. Optimal aperture is between F/5.6 and
F/11 with peak performance at F/8. This lens features continuous focusing (CF)
into macro mode with 1:2.8 macro magnification at the 70mm setting. Maximum
aperture varies from F/3.5 at 35mm to F/4.5 at 70mm. Introduced in 1980, this
lens was replaced in 1983 with the model 17A lens which features a tweaked
optical design providing a constant F/3.5 maximum aperture. Both lenses have
above average and nearly identical optical performance.
Lens Specifications:
| Lens Model |
09A |
| Focal Length |
35 — 70mm |
| Aperture Range |
f/3.5~4.5 — 32, AE |
| Angle of View |
64°~34° |
Optical
Construction
(Groups / Elements) |
7 / 7 |
| Min. Focus from Film
Plane |
9.8" (0.25m) at f=70mm |
| Macro Mag. Ratio [w/2X
Converter] |
1:2.8 [1:1.4] at f=70mm |
| Filter Size |
58mm |
| Diameter |
2.5" (64.5mm) |
Length at
[w/Nikon mount] |
2.2" (56.5mm)
[2.4" (61mm)] |
| Weight |
11.4 oz. (322g) |
| Lens Hood |
Push-on type #25FH, (optional extra). |
| Accessory |
Accepts SP 2X tele-converter. |
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