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Tamron SP 300mm F/2.8 LD-IF Model 360B: This lens, compared
to the earlier model 60B, features a very slightly revised optical design and
adds a floating element system to the internal focusing system. The overall
optical layout, including the two low dispersion (LD) elements (shown in green
in the above optical layout) and the spherical aberration compensator group, is
nearly identical to the earlier model 60B. This cosmetically redesigned model
360B features a new lens hood which attaches via two screws instead of the
bayonet-on lens hood found on the earler model. Thanks to the new floating
element internal focusing system, optical performance is slightly improved over
the earlier model, particularly off-axis and at closer focusing distances.
Overall optical performance is "best in class" when compared to other similarly
priced 300mm F/2.8 lenses.
Lens Specifications:
| Lens Model |
360B |
| Focal Length |
300mm |
| Aperture Range |
f/2.8 — 32, AE |
| Angle of View |
8° |
Optical
Construction
(Groups / Elements) |
7 / 10 |
| Min. Focus from Film
Plane |
98.4" (2.5m) |
| Macro Mag.
Ratio |
— |
| Filter Size |
43mm (rear), 112mm (front) |
| Diameter |
4.6" (117.5mm) |
Length at
[w/Nikon mount] |
8.2" (208mm)
[8.4" (212.5mm)] |
| Weight |
80.0 oz. (2269g) |
| Lens Hood |
Bayonet type #B3FH, reversible. |
| Accessory |
Accepts SP 2X tele-converter #01F. Supplied
wth lens hood. Additional 43mm rear filters and 112mm front filter available as
optional extras. |
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