Astro-Tech AT102ED Ficha de especificações

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A T 102 ED

Thank you for choosing this Astro-Tech AT102 ED 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 –

PARTS OF THE AT 102 ED

Multiple reticle

illuminated finder

Tension adjustment

and lock knob for

focuser drawtube

Dust cover

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

Lock knob for

retractable

dew shield

Tube ring

lock knobs

Split tube rings

Detachable dovetail to fit Astro-Tech,

Celestron, Meade, and Vixen mounts

Brass

compression

ring

1.25" eyepiece

lock knob

from Astronomy Technologies

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.

Locking collar for

360° rotatable focuser

Multiple reticle

illuminated finder

Retractable

dew shield

Left coarse focus knob

Focusing scale on

focuser drawtube

2" eyepiece

1.25"

eyepiece

adapter

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

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)

Hex-head

screws (do

not adjust)

holder

1.25"

eyepiece

adapter

lock knob

Dust seal

hard case, with carrying handle

Tube

rings

Alternate

finder

mounting

location

(slotted

head)

Fine

focus

knob

Right

coarse

focus

knob

2" eyepiece

lock knob