Tamron Adaptall-2 28-50mm F/3.5-4.5 Model 07A: A wide angle
to normal zoom lens with somewhat above average performance. The extremely
compact optical design minimizes distortion at the wide angle settings and
produces virtually zero distortion at the 50mm setting. This lens is notable
for being very compact and will fit in most camera ever-ready cases. Optical
performance at 28 mm is very good by F/8, yet remains slightly soft in the
corners. Optical performance from 37mm to 50mm is very good across the field by
F/5.6, with much better corner sharpness as well. Overall optimal aperture is
F/11. While the performance isn't nearly as good as Tamron's SP 24-48, this
lens was much less expensive and offered a perfect price versus performance
ratio for amateur photographers. This lens also features continuous focusing
(CF) into macro mode and reaches a 1:5 reproduction ratio at the 50mm
setting.
Lens Specifications:
Lens Model |
07A |
Focal Length |
28 50mm |
Aperture Range |
f/3.5~4.5 32, AE |
Angle of View |
75°~47° |
Optical
Construction (Groups / Elements) |
9 / 9 |
Min. Focus from Film
Plane |
9.8" (0.25m) at f=50mm |
Macro Mag. Ratio [w/2X
Converter] |
1:4 [1:2] at f=50mm |
Filter Size |
58mm |
Diameter |
2.5" (64.7mm) |
Length at
[w/Nikon mount] |
1.8" (46.2mm) [2.0" (50.7mm)] |
Weight |
10.5 oz. (297g) |
Lens Hood |
Push-on type #26FH, (optional extra). |
Accessory |
Accepts F-system 2X tele-converter. |
|