astro-tech
AT 127EDTfrom Astronomy Technologies
Thank you for choosing this
The lenses in your scope’s 950mm f/7.5
performance of your AT127EDT is very impressive for its very reasonable price.
This instruction sheet will provide you with information on how to get the most out of your new
Please familiarize yourself with the parts and functions of your AT127EDT before using it for the first time.
PARTS OF THE AT127EDT
Retractable
dew shield | Carrying handle/accessory mount |
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| Tube ring | 2” star | |
| lock knob | ||
Tube | diagonal | ||
(1 of 2) | |||
rings |
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| Finderscope focusing ring |
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Finderscope focus lock ring |
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| Illuminator |
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| on/off/brightness | 1.25” | |
| control | ||
eyepiece | |||
dovetail | Finderscope | holder | |
8x50mm | collimating |
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finderscope | screw (1 of 3) | Mounting point | |
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Carrying handle/accessory mount | for finder |
Finderscope illuminator | Fine focus |
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Crosshair focus lock ring | knob |
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Crosshair focusing ring |
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Lock knob for |
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focuser drawtube |
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| Left coarse | 2” accessory |
| 2” accessory Right coarse | |
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| focus knob | lock knob |
| holder | focus knob |
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Aperture | 127mm (5”) | Lens Shade Outer Diameter | 156mm | ||||
Focal Length | 950mm | Objective Lens Cover | ..................... | ||||
Focal Ratio | f/7.5 | Tube Diameter |
| 130mm o. d. | |||
Objective Type | Tube Rings .... dual split hinged rings with | ||||||
Optical Coatings | fully multicoated | dovetail and carrying handle/accessory mount | |||||
Resolving Power (Dawes’ Limit) | 0.91 arc seconds | Tube Length (lens shade retracted) | 33.25” (845mm) | ||||
Visual Limiting Magnitude | 13.0 maximum | 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 | Case | |||||
Focuser |
| 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 | 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 |