TAMRON Wide Field Tele-View-Adapter
Applications The built-in quality of Tamron’s 35mm
SLR interchangeable lenses can be utilized
in a high-performance telescope by attaching the Tele-View Adapter for a wide
range of applications.



Observations of nature (bird watching
studying animals in their native habitat)
Watching baseball games, horse races,
etc.
Watching plays, etc.
Many other
Features 
Name of Parts 1.
Wide field of view
The normal field of view for a 25X
telescope at 1,000 meters is 34 meters.
By attaching the tele-view adapter to
the SP 500mm lens, however, the field
of view is 50 meters at a distance of
1,000 meters. This is an increase of
approximately 50%.
High performance, high resolution
The resolution is greatly superior to
that of ordinary telescopes and binoculars because the interchangeable lens
is required to have high performance and
high resolution.
Bright field of view
The bright periphery produced by the
camera lens and the use of a high
percision, high quality roof prism
produce an extremely bright field of
view.
L-shaped for easy, fatigue-free viewing
The eyes do not tire easily because
the image appears right side up and the
viewer can look from a natural, downward position.
Easily applicable as a microscope too
By attaching the tele-view adaptor to
a macro lens with an extension ring, a
microscope can also be easily made.
High magnification ratio
A 10X telescope can be made by attaching the tele-view adapter to a
200mm lens.
Built-in diopter adjustment
A built-in diopter adjustment allows
adjustment to individual eyesight.
Compact, lightweight
2.
3.
4.
5.
6.
7.
8.
Operating Instructions 1.
2.
Adjust the diopter adjustment ring
On the top of the adaptor to suit your
own eyesight.
3.
When removing the tele-view
adaptor
9.
1.
4.
Specifications
2.
Focal Length
= Mag. ratio
90mmX
3.6XXX
70-150mm
3.5X - 7.5X
135mmX
6.7XXX
85-210mm
4.2X-10.5X
200mmX
10.0XXX
70-210mm
3.5X-10.5X
300mmX
15.0XXX
80-250mm
4 X-12.5X
500mmX
25.0XXX
70-150mm
3.5X-17.5X
200-500mm
10 X-25 X
Field of view at 100m
=
2500/focal length
Field of view at 100 yds.
=
7500/focal length (feet)
For example, to find the field of view
when the tele-view adapter is used with
the SP 500mm lens at 100m:
2500/500 = 5M. At 1,000m the field
of view would be 50m.
The field of view for various lenses used
with the tele-view adapter at 100m
(100 yds) are as follows.
Exit diameter
(10X) 5.01mm
(25X) 2.5mm
Field of view (1,000m)
(10X) 125.0m
(25X) 50.0m
Angle of view
(10X) 7.2o
(25X) 2.87o
Construction
5 elements + roof prism
Overall lenght
61mm
Height
106mm
Weight
257 grams
Mag. ratio
The field of view when the tele-view
adapter is attached to a camera lens
can be found by using the following
formulas:
Focal Length
High performance but easy to
own price
The magnification ratio of telescopes
made by attaching a tele-view adapter to a camera lens can be found by
fividing the focal length ny 20. The
following are representative examples:
Focal Length
Magnification Ratio Press the L-shaped lever directly opposite the aperture indicator window on
the rear of the lens and rotate the
adaptor counterclockwise. The adapter
can be removed when it stops turning.
Using a tripod
Place the tele-view adapter with the
eyepiece pointing upward and place it
on the panhead of the tripod. Then
screw the tripod screw into the tripod
socket of the adapter.
The 106mm height, 61mm length
and 257 gram weight allow the teleview adpter to be slipped into a
pocket to take along on photographic
meets, trips, etc.
Attaching to
A lens
The extremely
simple Adaptall bayonet
mount is used.
The tele-view
adapter can be
attached to a
lens by merely
matching the
green dot on
the rear of the
lens with the green dot on the bayonet
part of the adapter and rotating clockwide approximately 2.5cm until a click
is heard. Field of viev (m)
(Angle of view)
Field of viev (ft)
(Angle of view)
50mm
50m (28.7o)
150 ft (28.7o)
105mm
23.8 m (13.6o)
71.4 ft (13.6o)
135mm
18.5 m (10.6o)
55.6 ft (10.6o)
200mm
12.5 m (7.2o)
37.6 ft (7.2o)
300mm
8.3 m (4.7o)
25.0 ft (28.7o)
500mm
5 m (2.8o)
15 ft (2.8o)
TAMRON Wide Field Tele-View-Adapter
Applications 


Observations of nature (bird watching
studying animals in their native habitat)
Watching baseball games, horse races,
etc.
Watching plays, etc.
Many other
Features 
Name of Parts The built-in quality of Tamron’s 35mm
SLR interchangeable lenses can be utilized
in a high-performance telescope by attaching the Tele-View Adapter for a wide
range of applications.
1.
Wide field of view
The normal field of view for a 25X
telescope at 1,000 meters is 34 meters.
By attaching the tele-view adapter to
the SP 500mm lens, however, the field
of view is 50 meters at a distance of
1,000 meters. This is an increase of
approximately 50%.
High performance, high resolution
The resolution is greatly superior to
that of ordinary telescopes and binoculars because the interchangeable lens
is required to have high performance and
high resolution.
Bright field of view
The bright periphery produced by the
camera lens and the use of a high
percision, high quality roof prism
produce an extremely bright field of
view.
L-shaped for easy, fatigue-free viewing
The eyes do not tire easily because
the image appears right side up and the
viewer can look from a natural, downward position.
Easily applicable as a microscope too
By attaching the tele-view adaptor to
a macro lens with an extension ring, a
microscope can also be easily made.
High magnification ratio
A 10X telescope can be made by attaching the tele-view adapter to a
200mm lens.
Built-in diopter adjustment
A built-in diopter adjustment allows
adjustment to individual eyesight.
Compact, lightweight
2.
3.
4.
5.
6.
7.
8.
Operating Instructions 1.
2.
Adjust the diopter adjustment ring
on the top of the adaptor to suit your
own eyesight.
3.
When removing the tele-view
adaptor
9.
Magnification Ratio 1.
4.
Specifications
The magnification ratio of telescopes
made by attaching a tele-view adapter to a camera lens can be found by
fividing the focal length ny 20. The
following are representative examples:
Focal Length
2.
Press the L-shaped lever directly opposite the aperture indicator window on
the rear of the lens and rotate the
adaptor counterclockwise. The adapter
can be removed when it stops turning.
Using a tripod
Place the tele-view adapter with the
eyepiece pointing upward and place it
on the panhead of the tripod. Then
screw the tripod screw into the tripod
socket of the adapter.
Focal Length
= Mag. ratio
90mmX
3.6XXX
70-150mm
3.5X - 7.5X
135mmX
6.7XXX
85-210mm
4.2X-10.5X
200mmX
10.0XXX
70-210mm
3.5X-10.5X
300mmX
15.0XXX
80-250mm
4 X-12.5X
500mmX
25.0XXX
70-150mm
3.5X-17.5X
200-500mm
10 X-25 X
Field of view at 100m
=
2500/focal length
Field of view at 100 yds.
=
7500/focal length (feet)
For example, to find the field of view
when the tele-view adapter is used with
the SP 500mm lens at 100m:
2500/500 = 5M. At 1,000m the field
of view would be 50m.
The field of view for various lenses used
with the tele-view adapter at 100m
(100 yds) are as follows.
High performance but easy to
own price
Exit diameter
(10X) 5.01mm
(25X) 2.5mm
Field of view (1,000m)
(10X) 125.0m
(25X) 50.0m
Angle of view
(10X) 7.2o
(25X) 2.87o
Construction
5 elements + roof prism
Overall length
61mm
Height
106mm
Weight
257 grams
Mag. ratio
The field of view when the tele-view
adapter is attached to a camera lens
can be found by using the following
formulas:
Focal Length
The 106mm height, 61mm length
and 257 gram weight allow the teleview adpter to be slipped into a
pocket to take along on photographic
meets, trips, etc.
Attaching to
A lens
The extremely
simple Adaptall bayonet
mount is used.
The tele-view
adapter can be
attached to a
lens by merely
matching the
green dot on
the rear of the
lens with the green dot on the bayonet
part of the adapter and rotating clockwide approximately 2.5cm until a click
is heard. Field of viev (m)
(Angle of view)
Field of viev (ft)
(Angle of view)
50mm
50m (28.7o)
150 ft (28.7o)
105mm
23.8 m (13.6o)
71.4 ft (13.6o)
135mm
18.5 m (10.6o)
55.6 ft (10.6o)
200mm
12.5 m (7.2o)
37.6 ft (7.2o)
300mm
8.3 m (4.7o)
25.0 ft (28.7o)
500mm
5 m (2.8o)
15 ft (2.8o)
Tokyo Main Office Tamron Bldg. 17-11, 7-chome Takinogawa, Kita-ku, Tokyo, Japan (Zip 114) Tel.: (03) 916-0131
Telex 123977 Tamron, 272-2220 Tamron Cable: “Tamrontaisei Tokyo”
Specifications and availability are subject to change without notice.
910EC371 Printed in Japan
TAMRON Wide Field Tele-View-Adapter
Design (from box illustrations) Specification Magnification Ratio (when attached to a camera lens) Focal length/20 = Mag. ratio Example: With a 200mm F/3.5 10X With a 500mm F/8 25X Field of View At 100m 2500/Focal length At 100 yds 7500/Focal length Example: With a 200mm F/3.5 12.5m 37.5 ft. (7.2O) With a 500mm F/8 5.0m 15.0 ft. (2.8O) Construction 5 elements + 1 roof prism Dimensions and Weight Max. length 61mm Max height 106mm Weight 257 grams Features  Wide field of view  High performance, high resolution  Bright field of view  L‐shaped for easy, fatigue‐free viewing  Built‐in diopter adjustment 
Compact, lightweight design What the manual doesn’t say: The inner part of the tele‐view adapter’s mount has a standard 49mm filter thread. Thus, it is fairly straightforward to construct an adapter for other types of gear. Shown here is a 1.25” adapter that converts the tele‐view adapter into a terrestrial eyepiece for a small astronomical telescope. Copyright © 2013 - Steen G. Bruun