25
PowerSeeker Specifications
21039 21041 21036 21044
PS 50AZ
PS 60AZ
PS 70AZ
PS 76AZ
Optical Design
Refractor
Refractor Refractor Newtonian
Aperture
50mm (2.0")
60mm (2.4")
70mm (2.8")
76mm (3.0")
Focal Length
600mm
700mm
700mm
700mm
Focal Ratio
f/12
f/12
f/10
f/9
Optical Coatings
fully coated
fully coated
fully coated
fully coated
Finderscope 5x24
5x24
5x24
5x24
Diagonal
Star Diagonal 0.96" Erect Image 1.25"
Erect Image 1.25"
n/a
Eyepieces
20mm .96" (30x)
20mm 1.25" (35x) 20mm 1.25" (35x)
20mm 1.25" Erect
Image (35x)
12mm .96" (50x)
n/a
n/a
n/a
4mm .96" (150x)
4mm 1.25" (175x) 4mm 1.25" (175x) 4mm 1.25" (175x)
Apparent FOV -- 20mm @ 50°
-- 10mm @ 40°
Barlow Lens - 3x
0.96"
1.25"
1.25"
1.25"
w/20mm (90x)
w/20mm (105x)
w/20mm (105x)
w/20mm (105x)
w/12mm
(150x)
n/a
n/a
n/a
w/4mm (450x)
w/4mm (525x)
w/4mm (525x)
w/4mm (525x)
Angular Field of View w/20mm eyepiece
1.7°
1.4°
1.4
°
1.4°
Linear FOV w/20mm eyepiece -ft/1000yds
89
74
74
74
Mount Altazimuth
Altazimuth
Altazimuth
Altazimuth
Altitude Locking Knob
yes
yes
yes
yes
Azimuth Lock
no
yes
yes
yes
CD-ROM "The SkyX"
yes
yes
yes
yes
Highest Useful Magnification
120x
142x
165x
180x
Limiting Stellar Magnitude
11.1
11.4
11.7
11.9
Resolution -- Raleigh (arc seconds)
2.66
2.31
1.98
1.82
Resolution -- Dawes Limit " "
2.28
1.93
1.66
1.53
Light Gathering Power
51x
73x
100x
118x
Optical Tube Length
22" (56cm)
28" (71cm)
30" (76cm)
26" (66cm)
Telescope Weight
1.5# (0.7kg)
2.0# (0.9kg)
6# (2.7kg)
8.5# (3.9kg)
Note: Specifications are subject to change without notice or obligation