|
Select a product from
the list below in order to see the detailed product review.
 |
|
> XW Series | |
 |
|
> XO | |
 |
|
> XP IMAGE PROJECTION | |
 |
|
> XF Series | |
|
|
Model:
XW Series
Description
:
Clear, Comfortable Viewing Assured
by 70?Apparent Angle of View and 20mm Eye Relief
All smc PENTAX XW-series
eyepieces feature an extra-wide 70-degree apparent angle of view and an
extra-long 20mm eye relief to deliver an exciting, wide-perspective
image.
High-Grade Optics for Exceptional
Image Quality
The high-performance XW-series
optics incorporates high-refraction, extra-low-dispersion lanthanum
glass elements to produce a well-balanced image with minimal
aberrations. It is particularly designed to reduce the disturbing
blackout effect by effectively compensating the spherical aberration of
the pupil.
PENTAX-Original Multi-Layer
Coating for Outstanding Light Transmission Efficiency
All lens surfaces that come
in contact with air are treated with the original multi-layer coating,
while all laminated surfaces are treated with the innovative partial
coating, to offer the light transmission efficiency of more than 90
percent (an astonishing 96 percent at 550nm) over the visible light
spectrum.
Advanced Light-Shielding
Technology for Improved Image Contrast
Thanks to PENTAX advanced
computer simulation technology, the XW series features a light-shielding
diaphragm at the most effective position to drastically reduce internal
reflections for a brighter, higher-contrast image.
A Choice of Four Magnifications to
Meet Specific Applications
With four different
magnifications (7mm, 10mm, 14mm and 20mm) to choose from, the XW series
accommodates a wide range of both casual and specialized applications.
Weatherproof Construction for
All-Weather Viewing
The XW series features JIS Class 4 weatherproof construction,* making it
possible to use it in drizzle or under night dew.
* The XW-series eyepieces are not designed
for underwater use and should not be submerged under water.
American-Standard Eyepiece Sleeve
and Built-In Adapter-Mounting Screw
The XW series features the
American-standard 31.7mm for smooth, easy installation on the PENTAX
spotting scopes. When the rotatable eyecup is removed, it also offers an
adapter-mounting screw/thread (43mm in diameter with a 0.75mm pitch).
 |
Specification :
| No. |
Focal length |
AFOV |
Eye relief |
Lenses / Groups |
| XW 3.5 |
3.5 mm |
70 |
20 mm |
8 Lenses / 5 Groups |
| XW 5 |
5 mm |
70 |
20 mm |
8 Lenses / 5 Groups |
| XW 7 |
7 mm |
70 |
20 mm |
8 Lenses / 6 Groups |
| XW 10 |
10 mm |
70 |
20 mm |
8 Lenses / 6 Groups |
| XW 14 |
14 mm |
70 |
20 mm |
8 Lenses / 6 Groups |
| XW 20 |
20 mm |
70 |
20 mm |
6 Lenses / 4 Groups |
| XW 30 |
30 mm |
70 |
20 mm |
7 Lenses / 6 Groups |
| XW 40 |
40 mm |
70 |
20 mm |
6 Lenses / 5 Groups |
| No. |
Barrel size |
Length |
Diameter |
Weight |
| XW 3.5 |
1.25" |
137 mm |
61 mm |
405 g |
| XW 5 |
1.25" |
127 mm |
61 mm |
395 g |
| XW 7 |
1.25" |
120 mm |
61 mm |
390 g |
| XW 10 |
1.25" |
110 mm |
61 mm |
390 g |
| XW 14 |
1.25" |
97 mm |
61 mm |
365 g |
| XW 20 |
1.25" |
86 mm |
61 mm |
355 g |
| XW 30 |
2" |
123 mm |
76 mm |
740 g |
| XW 40 |
2" |
117 mm |
76 mm |
700 g |
Model:
XO
Description
:
Two XO-series eyepieces designed for use
with PENTAX-brand astronomical telescopes. Combining the outstanding
benefits of the smc PENTAX O series in visual observation and the
smc PENTAX XP series in astronomical photography, PENTAX developed
totally new dual-purpose optics for the XO series.
With focal lengths of 2.5mm and 5mm, these
high-performance eyepieces are perfect for high-magnification
observation and photography of the planets.
The new XO series incorporates
high-refraction, low-dispersion lanthanum glass elements to provide
high-resolution images with minimal aberrations and PENTAX-original
full-surface multi-layer lens coating to improve light transmission
efficiency. In addition, laminated optical elements are treated with
the innovative partial coating. Taking advantage of advanced
computer simulation technology, PENTAX also succeeded in minimizing
internal reflections to deliver a bright, high-contrast image.
The XO-series eyepieces also feature a
44-degree apparent field of view and a filter attachment diameter of
28.6mm (one and one-eighth inches). The American-standard
sleeve-fitting diameter of 31.7mm (1.25 inches) allows them to be
mounted on any telescope equipped with the American-standard sleeve.
The key objective when designing these
Pentax XO eyepieces was to get the best possible light transmission
and contrast. The Pentax XO eyepieces were laid out to offer an
outstanding contrast and on-axis image sharpness at high
magnifications. The light transmission is approx. 98%. At an
apparent field of view of 44?a standard 4 lens design would have
sufficed. But Pentax did not only design excellent eyepieces for
visual use, but also for photographical use through eyepiece
projection. Unlike most normal Orthoscopic eyepieces the excellent
image sharpness of the Pentax XO stretches out to the edges of the
field of view - both for visual and photographical use. To achieve
this Pentax has designed these eyepieces with 5 or 6 lenses,
respectively. Therefore the field of use of these eyepieces is both
high power observing and photography. The eyepieces guarantee that
the optical quality of the telescope is not wasted at all.
Featuring a high-performance, dual-purpose
optical system, the new smc PENTAX XO-series eyepieces are specially
designed to give a great opportunity ?for the general public as well
as researchers and amateur astronomers.
Model:
XP IMAGE PROJECTION
EYEPIECES
Description
:
Please put content here. Please put
content here. Please put content here. Please put content here.
Please put content here. Please put content here. Please put content
here. Please put content here. Please put content here. Please put
content here.
Optical Design of the XP3.8
Optical Design of the XP8
Optical Design of the XP24
Model:
XF Series
Description
:
Developed for exclusive use with the compact PF-65ED and PF-645ED
A spotting scopes,
the smc PENTAX XF series offers a choice of three distinctive
eyepieces: two unifocal models with a long eye relief and a wide
angle of view, and one zoom model with a 20-60X variable
magnification range. When the rotatable eyecup is removed, they
feature an adapter-mounting screw (30.5mm in diameter with a 0.5mm
pitch for the unifocal models, and 43mm in diameter with a 0.75mm
pitch for the zoom model).
Specification :
smc PENTAX XF-Series
Eyepieces only
| name |
smc PENTAX XF12 |
smc PENTAX XF8.5 |
smc PENTAX XF ZOOM EYEPIECE
6.5mm-19.5mm |
| Lens
Structure |
6 elements in 4 groups |
| Attachment
Diameter |
31.7mm |
| Length
& External Diameter |
78 x 43mm |
83 x 43mm |
88 x 50mm |
| Weight |
155g |
150g |
240g |
| Screw
Diameter for Adapter |
M30.5 P=0.5 |
M43 P=0.75 |
smc
PENTAX XF12 with Spotting Scope
| Product name
|
PENTAX PF-100ED
|
PENTAX PF-80ED
A |
PENTAX PF-80ED
|
PENTAX PF-65ED
A |
PENTAX PF-65ED
|
| Magnification
|
52X |
43X |
42X |
32.5X |
32.5X
|
| Real Field of
View |
1.2° |
1.4°
|
1.5° |
1.85° |
1.85°
|
|
Apparent Field of View |
60° |
60° |
60° |
60° |
60° |
| Field
of View at 1000m |
21m |
24m |
26m |
32m |
32m |
| Exit
Pupil |
1.9mm
|
1.8mm
|
1.9mm
|
2.0mm
|
2.0mm
|
| Eye
Relief |
18mm
|
18mm
|
18mm
|
18mm
|
18mm
|
|
Relative Brightness
|
3.1 |
3.2 |
3.1 |
4 |
4 |
smc
PENTAX XF8.5 with Spotting Scope
| Product name
|
PENTAX PF-100ED
|
PENTAX PF-80ED
A |
PENTAX PF-80ED
|
PENTAX PF-65ED
A |
PENTAX PF-65ED
|
| Magnification
|
74X |
61X |
59X |
46X |
46X |
| Real Field of
View |
0.8° |
0.95° |
1° |
1.3°
|
1.3° |
|
Apparent Field of View |
60° |
60° |
60° |
60° |
60° |
| Field
of View at 1000m |
14m |
16.5m
|
17m |
22m |
22m |
| Exit
Pupil |
1.4mm
|
1.3mm
|
1.4mm
|
1.4mm
|
1.4mm
|
| Eye
Relief |
18mm
|
18mm
|
18mm
|
18mm
|
18mm
|
|
Relative Brightness
|
1.9 |
1.6 |
1.9 |
1.9 |
1.9 |
smc
PENTAX XF Zoom Eyepiece 6.5mm-19.5mm with Spotting Scope
| Product
name |
PENTAX PF-100ED
|
PENTAX PF-80ED
A |
PENTAX PF-80ED
|
PENTAX PF-65ED
A |
PENTAX PF-65ED
|
|
Magnification |
32.5X-97.5X
|
27X-81X |
26X-78X |
20X-60X |
20X-60X
|
| Real
Field of View |
1.3°0.95° |
1.8°0.95° |
1.6°0.8° |
2.1°1° |
2.1°1° |
|
Apparent Field of View |
42°60° |
42°60° |
42°60° |
42°60° |
42°60° |
|
Field of View at 1000m |
22.5m-11m
|
31m-16.5m
|
28m-14m
|
37m-17m
|
37m-17m
|
|
Exit Pupil |
3.0mm-1.0mm
|
3.0mm-1.0mm
|
3.0mm-1.0mm
|
3.2mm-1.1mm
|
3.2mm-1.1mm
|
|
Eye Relief |
11mm-15mm
|
11mm-15mm
|
11mm-15mm
|
11mm-15mm
|
11mm-15mm
|
|
Relative Brightness
|
0.9-1.0
|
0.9-1.0
|
0.9-1.0
|
10.2-1.2
|
10.2-1.2
|
| 
