Meade specifications Astro-Tech AT102ED Apochromatic Refractor Specifications, Objective Type

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AT102ED from Astronomy Technologies

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 –

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.

PARTS OF THE AT 102 ED		Locking collar for
Multiple reticle	Lock knob for	360° rotatable focuser
	retractable	Multiple reticle
illuminated finder
	dew shield
Tube ring		illuminated finder
lock knobs		Retractable
		dew shield

Tube rings

Alternate finder

Tension adjustment

Hex-head screws (do not adjust)

Split tube rings Left coarse focus knob

mounting location (slotted head)

and lock knob for focuser drawtube

Dust cover

Detachable dovetail to fit Astro-Tech, Celestron, Meade, and Vixen mounts

Brass compression ring

Focusing scale on focuser drawtube

2” eyepiece holder

1.25”

eyepiece

adapter

Fine

focus knob

1.25” Right

eyepiece coarse

lock knob focus knob

1.25” eyepiece

1.25”

lock knobDust seal eyepiece

adapter

2” eyepiece lock knob

Astro-Tech AT102ED Apochromatic Refractor Specifications

Aperture		102mm (4”)
Focal Length		709mm
Focal Ratio		f/6.95
Objective Type ....	air-spaced doublet with ED element
Optical Coatings		fully multicoated
Resolving Power (Dawes’ Limit)		...... 1.14 arc seconds
Visual Limiting Magnitude		12.5 maximum
Light Grasp (versus the eye)		212x
Field Stops	3 knife-edge baffles in optical tube
Focuser		dual-speed Crayford
	with 10:1 reduction ratio fine focus;
2” and 1.25” compression ring eyepiece holders;
360° rotating camera angle/observing angle adjuster
Focuser Travel		3.35” (85mm)

with millimeter scale on drawtube for repeatable focus Finder ........ non-magnifying illuminated multiple reticle

Lens Shade	retractable, with lock knob
Objective Lens Cover			slip-on metal
Tripod Mount	hinged split rings with dovetail
for Astro-Tech, Celestron, Meade, and Vixen mounts
Tube Diameter			105mm o. d.
Tube Length (lens shade retracted)			........ 23” (584mm)
Tube Length (lens shade extended)			..... 27.5” (699mm)
Optical Tube Weight			7.3 lbs. (3.32 kg)
Weight (w/dovetail, rings, finder)		.....	10.1 lbs. (4.59 kg)
Case	lockable aluminum-frame foam-fitted
	hard case, with carrying handle
Case External Dimensions		28.75” x 9.75” x 8.5”
Lowest Usable Power		17.5x (40mm eyepiece)
Highest Terrestrial Power		101x (7mm eyepiece)
Highest Practical Power		177x (4mm eyepiece)
Theoretical Maximum Power ..		203x (3.5mm eyepiece)