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Your telescope is designed to give you years of fun and rewarding observations. However, there are a few things to consider before using
your telescope that will ensure your safety and protect your equipment.
Warning
Never look directly at the sun with the naked eye or with a telescope (unless you have the proper solar
filter). Permanent and irreversible eye damage may result.
Never use your telescope to project an image of the sun onto any surface. Internal heat build-up can damage the telescope and any
accessories attached to it.
Never use an eyepiece solar filter or a Herschel wedge. Internal heat build-up inside the telescope can cause these devices to crack or
break, allowing unfiltered sunlight to pass through to the eye.
Never leave the telescope unsupervised, either when children are present or adults who may not be familiar with the correct operating
procedures of your telescope
.
Technical Specs
Highest Useful Magnification
480x 555x 660x 840x
Lowest Useful Magnification
29x 34x 40x 51x
Limiting Stellar Magnitude
14 14.4 14.7 15.3
Resolution: Rayleigh
.68 arc seconds .59 arc seconds .50 arc seconds .39 arc seconds
Dawes Limit
.57 arc seconds .49 arc seconds .42 arc seconds .33 arc seconds
Light Gathering Power
843x unaided eye 1127x unaided eye 1593x unaided eye 2579x unaided eye
Field of View: standard eyepiece
.85º .8º .67º .48º
Linear FOV (@1000 yds)
44 ft. 42 ft. 35 ft. 25 ft.
Optical Coatings - Standard
Starbright XLT Coating Starbright XLT Coating Starbright XLT Coating Starbright XLT Coating
Secondary Mirror Obstruction
2.7" 3.35" 3.75" 4.5"
by Area
11% 13% 12% 10%
by Diameter
34% 36% 34% 32%
Optical tube length
17 inches 22 inches 24 inches 31 inches
#91030
-
XLT
#91040
-
XLT
#91050
-
XLT
#91060
-
XLT
EdgeHD 800 EdgeHD 925 EdgeHD 1100 EdgeHD 1400
Diameter
203mm (8") EdgeHD
Optics
235mm (9.25") EdgeHD
Optics
280mm (11") EdgeHD
Optics
356mm (14") EdgeHD
Optics
Focal Length
2032mm F/10 2350mm F/10 2800mm F/10 3910mm F/10
Eyepiece
40mm - 1.25" (51x) 23mm - 2" (102x) 23mm - 2" (122x) 23mm - 2" (170x)
Finderscope
9x50 9x50 9x50 9x50
Diagonal
90° - 1.25"
90° - 2" with 1.25"
adapter
90° - 2" with 1.25"
adapter
90° - 2" with 1.25"
adapter
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