Meade Telescope AT102EDF User Manual

astro-tech  
AT 1 0 2 E D F  
from Astronomy Technologies  
Thank you for choosing this Astro-Tech AT102EDF  
high-performance ED refractor with Feather Touch focuser.  
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.  
dovetail, hard case, and more – is unsurpassed at its sensible  
price. We believe you will agree that the performance and  
features of your AT102EDF 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 AT102EDF before operating it for the first time.  
Its package of standard features – a genuine Feather  
Touch dual-speed microfocuser from Starlight Instruments,  
an illuminated multiple reticle finder, tube rings with separate  
Locking collar for  
360° rotatable focuser  
PARTS OF THE AT102EDF  
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)  
Feather  
Touch  
micro-  
focuser  
Left coarse focus knob  
Focusing scale on  
Tension  
adjustment  
and lock knob  
for focuser  
drawtube  
Split tube rings  
Fine  
focus  
knob  
Detachable dovetail to fit Astro-Tech,  
Celestron, Meade, and Vixen mounts  
focuser drawtube  
2” eyepiece  
holder  
Dust cover  
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 AT102EDF 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-type with genuine Case.................... lockable aluminum-frame foam-fitted  
Feather Touch 9:1 reduction ratio microfocuser;  
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)  
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