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Tamron AF 28-200mm
F/3.8-5.6 XR Aspherical (IF) Super Zoom Lens
The world's smallest, most
lightweight 28-200mm high
magnification zoom lens.
With a minimum focal
distance over the entire
zoom area of 49cm, and a
maximum magnification of 1:4
(at 200mm), this remarkable
lens achieves high
magnification zoom
performance with the compact
size of a standard zoom
lens. Through XR (Extra
Refractive Index) glass and
efficient use of aspherical
lenses, Tamron has achieved
a 25% reduction in size and
a 27% reduction in weight
over the previous model
(Model 371D), along with a
decrease in filter diameter
by two-steps °72mm- °62mm)
without compromising the
superior image quality
characteristic of Tamron
28-200 lenses.
The first most important
reason that the lens is so
compact is the use of high
refractive index glass. That
is, XR Glass. High
refractive index glass bends
light more than normal or
lower refractive index
glasses. Normally, glass
material having a refractive
index of more than 1.69 is
called high refractive index
glass. In the A03 optical
system, glass material
having a refractive index of
more than 1.69 is used in
the first group. In
addition, refractive index
of the whole optical system
is enhanced. By using high
refractive index glass in
the first group, we could
make the elements in the
first group thinner, and
reduce one element in the
second group. This made the
overall length of the whole
optical system shorter. Now,
with a shorter optical
system, the distance from
the diaphragm to the front
surface of the objective
lens becomes shorter, which
enabled us to make the clear
aperture (the front element
diameter) of the front
element smaller by two full
filter sizes. This allowed
us to also incorporate 3
Aspherical elements to
further correct for any
aberrations. Also, LD glass
is not used in this lens
since any chromatic
aberration is very well
compensated for with the
optical system that uses a
combination of XR and
Aspheric elements. Also,
multi-coated surfaces are
used in abundance.
A mechanism reduced to fit a
more compact barrel. The
moving triple cam is key to
the perfection of the lens
was development of a
mechanism to achieve
rock-solid stability during
the radical barrel movement
between the retracted 28mm
position to the extended
200mm position: the moving
triple cam. This remarkable
mechanism transforms the
conventional fixed triple
cam into a moving unit that
slides in conjunction with
the zooming action. In order
to fit such a complex
mechanism into the compact
barrel, the mechanical
design was enhanced to
incorporate parts and
mechanisms of greater
precision and performance
with less weight and volume.
The dramatic compact,
lightweight design combined
with uncompromising
performance and durability
were the result.
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62mm Filter Size |
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No Vigenetting with Built-in
Flash on Most Cameras |
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Easy Handling |
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Extremely Portable for
Traveling |
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Fits Today's Compact SLR
Cameras |
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Construction |
14 Groups/ 10 Elements |
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Angle of view |
75°-12° |
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F stop range |
3.8-22 |
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Closest Focusing Distance |
19.3in.(0.49m) |
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Maximum Magnification |
1:4.0 (at 200) |
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Filter Size |
62mm |
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Dimensions (Length x
Diameter) |
3.0 x 2.8in. (75.2 x 71mm) |
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Weight |
12.5oz. (354gm) |
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Notes |
high refractive index glass |
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German and French Description
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Die neue
Dimension für Megazoom Objektive. Geschaffen
als das leichteste und kleinste Objektiv der
28-200mm Klasse. Die Länge entspricht der
einer Kreditkarte. Dabei ist die optische
und mechanische Konstruktion eine High-Tech
Leistung der Extraklasse. Die
Naheinstellgrenze liegt bei 49cm über den
gesamten Brennweitenbereich. Ideal für
Anwender die ein leichtes und kompaktes
Universal Zoomobjektiv für brillante und
scharfe Bilder suchen.
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Gruppen - Elemente |
14-15 |
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Bildwinkel |
12 -
75 |
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Bauweise |
Drehzoom |
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Anzahl
Blendenlamellen |
7 |
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Kleinste Blende |
22 |
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kürzeste Einstellentfernung [m] |
0.49 |
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Max.
Abbildungsmaßstab |
1:4 |
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Filtergröße [mm] |
62 |
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Gewicht [g] |
354 |
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Größter Durchmesser x Baulänge [mm] |
71 x
75,2 |
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Lichtstärke |
3,8-5,6 |
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Brennweite [mm] |
28 -
200 |
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Sonnenblende |
ja |
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Canon
AF |
ja |
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Minolta AF |
ja |
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Nikon
AF |
ja |
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Pentax
AF |
ja |
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Un
trans-standard 28-200 mm incroyablement
compact et léger ! Remarquable, cet objectif
assure la meilleure qualité d’image qu’un
zoom d’une telle amplitude puisse offrir
tout en gardant
l’encombrement d’un objectif de focale
standard. Il propose aussi de véritables
fonctions Macro,
avec une mise au point minimale de seulement
49 cm à toutes les focales et un ratio de
1:4 à la
focale de 200 mm. Et grâce à la judicieuse
utilisation de lentilles XR (Indice Extra de
Réfraction)
et asphériques, Tamron a réussi à réduire sa
taille de 25 % et son poids de 27 % par
rapport à son prédécesseur (Modèle 371D),
tout en diminuant aussi de deux tailles le
diamètre du filtre. Sans
altérer la qualité supérieure de l’image, il
passe de Ø 72 à 62 mm.
l Diamètre filtre: Ø 62mm l Distance
minimale de mise au point/49cm l Monture
compatible/Canon AF, Minolta AF, Nikon AF-D,
Pentax AF l Parasoleil en corolle
l Grâce à son système de mise au point
interne, cette optique fournit une image
plus large que les optiques conventionnelles,
à une mise au point autre qu`à l'infini.
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Groupes-Lentilles |
14-15 |
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Angle
de champ |
12 -
75 |
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Construction Optique |
rotation |
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Lames
Diaphragme |
7 |
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Ouverture Mini |
22 |
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Mise
au point mini (m) |
0.49 |
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Grossissement maxi |
1:4 |
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Diamètre filtre (mm) |
62 |
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Poids
(g) |
354 |
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Diamètre x Longueur (mm) |
71 x
75,2 |
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Ouverture Maxi |
3,8-5,6 |
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Longueur Focale [mm] |
28 -
200 |
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Parasoleil |
oui |
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Canon
AF |
oui |
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Minolta AF |
oui |
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Nikon
AF |
oui |
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Pentax
AF |
oui |
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