astro-tech
AT 1 0 2 E D
Thank you for choosing this Astro-Tech AT102ED high-
performance ED refractor.
The images from its 709mm focal length f/6.95 ED (Extra-
low Dispersion glass element) air-spaced doublet optics are
virtually color-free, even at high magnifications.
Its package of standard features – a dual-speed Crayford-
style focuser, an illuminated multiple reticle finder, tube rings
with a separate Vixen-style dovetail, hard case, and more –
from Astronomy Technologies
is unsurpassed at its sensible price. We believe you will
agree that the performance and features of your AT102ED
make it an exceptional value.
This sheet will provide you with information on how to
get the most out of your new scope, and how to maintain
it so it can give you a lifetime of observing enjoyment.
Please familiarize yourself with the parts and functions
of your AT102ED before operating it for the first time.
Locking collar for
360° rotatable focuser
PARTS OF THE AT102ED
Tube
rings
Lock knob for
Multiple reticle
retractable
Multiple reticle
illuminated finder
dew shield
illuminated finder
Retractable
Tube ring
lock knobs
dew shield
Alternate
finder
mounting
location
(slotted
head)
Hex-head
screws (do
not adjust)
Left coarse focus knob
Focusing scale on
Split tube rings
Tension adjustment
and lock knob for
focuser drawtube
Fine
focus
knob
Detachable dovetail to fit Astro-Tech,
Celestron, Meade, and Vixen mounts
focuser drawtube
Dust cover
2” eyepiece
holder
Brass
compression
ring
1.25”
eyepiece
adapter
Right
coarse
focus
knob
1.25”
eyepiece
lock knob
1.25” eyepiece
lock knob
1.25”
eyepiece
adapter
Dust seal
2” eyepiece
lock knob
Astro-Tech AT102ED Apochromatic Refractor Specifications
Aperture .................................................... 102mm (4”) Lens Shade ........................ retractable, with lock knob
Focal Length ....................................................709mm Objective Lens Cover............................. slip-on metal
Focal Ratio ..........................................................f/6.95 Tripod Mount ............... hinged split rings with dovetail
ObjectiveType .... air-spaced doublet with ED element
for Astro-Tech, Celestron, Meade, and Vixen mounts
Optical Coatings................................ fully multicoated Tube Diameter.......................................... 105mm o. d.
Resolving Power (Dawes’ Limit) ...... 1.14 arc seconds Tube Length (lens shade retracted) ........ 23” (584mm)
Visual Limiting Magnitude.................. 12.5 maximum Tube Length (lens shade extended)..... 27.5” (699mm)
Light Grasp (versus the eye) ............................... 212x OpticalTube Weight.......................... 7.3 lbs. (3.32 kg)
Field Stops ............ 3 knife-edge baffles in optical tube Weight (w/dovetail, rings, finder) ..... 10.1 lbs. (4.59 kg)
Focuser ....................................... dual-speed Crayford Case.................... lockable aluminum-frame foam-fitted
with 10:1 reduction ratio fine focus;
hard case, with carrying handle
2” and 1.25” compression ring eyepiece holders; Case External Dimensions .........28.75” x 9.75” x 8.5”
360° rotating camera angle/observing angle adjuster Lowest Usable Power.............. 17.5x (40mm eyepiece)
FocuserTravel ....................................... 3.35” (85mm) HighestTerrestrial Power ..........101x (7mm eyepiece)
with millimeter scale on drawtube for repeatable focus Highest Practical Power.............177x (4mm eyepiece)
Finder ........ non-magnifying illuminated multiple reticle Theoretical Maximum Power .. 203x (3.5mm eyepiece)
Download from Www.Somanuals.com. All Manuals Search And Download.
|