Meade specifications Astro-Tech AT102EDF Apochromatic Refractor Specifications, 102mm, 709mm

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AT102EDF 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.

Its package of standard features – a genuine Feather Touch dual-speed microfocuser from Starlight Instruments, an illuminated multiple reticle finder, tube rings with separate

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.

PARTS OF THE AT102 EDF		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

Hex-head screws (do not adjust)

Feather	Tension	Split tube rings	Left coarse focus knob
Touch
	adjustment
micro-				Focusing scale on
	and lock knob
focuser		Detachable dovetail to fit Astro-Tech,
	for focuser			focuser drawtube
	drawtube	Celestron, Meade, and Vixen mounts
				2” eyepiece
	Dust cover	Brass
				holder
		compression
		ring		1.25”
				eyepiece
				adapter
		1.25” eyepiece		1.25”
		lock knob			Dust seal
				eyepiece

adapter

Tube rings

Alternate

finder mounting location (slotted head)

Fine

focus knob

1.25” Right

eyepiece coarse

lock knob focus knob

2” eyepiece lock knob

Astro-Tech AT102EDF 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-type with genuine

Feather Touch 9:1 reduction ratio microfocuser; 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)