Meade Telescope AT 127EDT User Manual

astro-tech  
AT 1 2 7 E D T  
from Astronomy Technologies  
Thank you for choosing this Astro-Tech AT127EDT performance of your AT127EDT is very impressive for its  
ED triplet refractor.  
The lenses in your scope’s 950mm f/7.5 air-spaced  
very reasonable price.  
This instruction sheet will provide you with information  
triplet optics include an advanced ED (Extra-low on how to get the most out of your new Astro-Tech  
Dispersion) glass element to give you images that are refractor, and how to properly maintain it so it can give  
virtually color-free, even at very high powers. Thanks to you a lifetime of observing enjoyment.  
its computer-optimized optical design, quality ED glass,  
Please familiarize yourself with the parts and functions  
and high transmission multicoatings, the optical of your AT127EDT before using it for the first time.  
PARTS OF THE AT127EDT  
Retractable  
Carrying handle/accessory mount  
dew shield  
Tube ring  
lock knob  
(1 of 2)  
2” star  
diagonal  
Tube  
rings  
Finderscope focusing ring  
Finderscope focus lock ring  
Illuminator  
on/off/brightness  
control  
1.25”  
eyepiece  
holder  
Vixen-style  
dovetail  
Finderscope  
collimating  
8x50mm  
finderscope  
screw (1 of 3)  
Mounting point  
for finder  
Carrying handle/accessory mount  
Finderscope illuminator  
Fine focus  
knob  
Crosshair focus lock ring  
Crosshair focusing ring  
Lock knob for  
focuser drawtube  
Left coarse 2” accessory 2” accessory  
focus knob lock knob holder  
Right coarse  
focus knob  
Astro-Tech AT127EDT ED Triplet Refractor Specifications  
Aperture............................................... 127mm (5”) Lens Shade Outer Diameter .......................156mm  
Focal Length ...............................................950mm Objective Lens Cover ..................... thread-in metal  
Focal Ratio ...................................................... f/7.5 Tube Diameter .................................... 130mm o. d.  
Objective Type.............................. air-spaced triplet Tube Rings .... dual split hinged rings with Vixen-style  
Optical Coatings ........................... fully multicoated  
Resolving Power (Dawes’ Limit)........ 0.91 arc seconds  
Visual Limiting Magnitude ..............13.0 maximum  
dovetail and carrying handle/accessory mount  
Tube Length (lens shade retracted) ..... 33.25” (845mm)  
Tube Length (lens shade extended)......37.25” (946mm)  
Light Grasp (versus the eye) ............................... 329x Optical Tube Weight................. 18.75 lbs. (8.52 kg)  
Field Stops ................ two internal knife-edge baffles Case ............................. aluminum-frame foam-fitted  
Focuser .......................... dual-speed rack and pinion  
lockable hard case, with carrying handle  
with 10:1 reduction ratio fine focus Case Dimensions ....................... 36.5” x 14.5” x 10”  
and 2” and 1.25” compression ring eyepiece holders Lowest Usable Power............ 19x (50mm eyepiece)  
Focuser Travel ................................ 4.25” (108mm) Highest Practical Power........ 238x (4mm eyepiece)  
Finder .........8 x 50mm with erect right-reading image Theoretical Maximum ........ 271x (3.5mm eyepiece)  
and variable brightness illuminated crosshair reticle Supplied Accessories.......... 10mm and 20mm 1.25”  
Lens Shade ............................................ retractable  
eyepieces; enhanced 99% reflectivity 2” diagonal  
 

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