Roland Mabo:
"What happened to the Tamron collaboration?
28-200, 28-105, 100-300 - then nothing. (btw, isn't
the FA28-80 f/3.5-5.6 the same as
Tamron's 28-80 f/3.5-5.6?)."
-------------------------------------
No. A quick comparison of the specifications shows
that the Pentax and Tamron 28-80s are quite different
designs (the pentax has more lens elements, a closer
focusing distance and is larger and heavier):
28-80 f/3.5-5.6
Pentax vs. Tamron
Groups/Elements
8 - 8 7 - 7
Angle of View
75� - 30,5� 75� - 30�
Minimum Aperture
22~38 22~38
Minimum Focus
0.50 m 0.7m
Macro Mag. Ratio
1:5.3 1:8
Filter Diameter
E�58 E�58
Diameter x Length (in mm)
� 65 x 87 �72 x 70.4mm
Weight
278 g 237g
BTW the 100-300mm Pentax is also different from the
Tamron. They differ in number of lens elements, filter
diameters, size and weight.
100-300
Pentax vs Tamron
Groups/Elements
9 - 11 9-12
Angle of View
24.5 � 8.2� 24.5�-8�
Minimum Aperture
32 32
Minimum Focus
1,5 m 1.5 m
Macro Mag. Ratio
1:3,8 1:4
Filter Diameter
E � 58 E � 55
Diameter x Length (in mm)
� 70 x 128.5 �71 x 115.5
Weight
390 g 354g
So I think these lenses are no Tamrons and are their
own design. But who knows, who makes somebody's
lenses...
Alexander
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