(New)GT102 102mm f/6.9 Apo Refractor

Product Code: A-F102GT
In Stock
Price: 50,040NT$

Available Options

102 Soft Case (BG1-P001):


The new 2015 GT 102 three-element super APO offer superb quality for imaging and visual use at an affordable price.

Package includes:

-GT 102 three element design with center FPL-53 and other ED element glass (air spaced)

-Mounting rings

-Retractable dew shield with lock screw

-All-new 2" R&P focuser design with 360-degree rotatable focuser

-2 speed knobs 1:10

-Aperture: 102mm F6.9

-Free vixen style dovetail plate

-Weight: 11 lb

-length: 27"


GT102  Specifications




Focal Ratio


Focal Length


Objective designed

3 elements Air-spaced with FPL53 glass

Resolving Power

1.13 arc "

Limiting Magnitude


Lens Shade



OD 2.3" R &P focuser ,360° Rotating Camera-angle Adjuster
1.25" Adapter Included

1.25" Adapter

Brass Compression Rings

Tube Diameter


Mounting Rings


Tube Length

27" (689mm) Fully Retracted

Tube Weight

11 lbs. (5.0kg)


High Quality Soft Case (Optional accessory)

Case Dimensions

31" x 10" x 13 "

(W x H x D)

(78cm x 25m x 34cm)



Specification for Apochromatic Lenses



All WO refractors objective are double tested and inspected before shipping to our customer, these telescopes are free of coma and astigmatism.
Since all individual lens surfaces are machine coated sometime it could have visual imperfections which do not affect the objective optical performance.

Dimensions of scratches and points shall not exceed the following values:

Surface finish class Scratches Points Accumulation of defects Width,not more, mm Total length, not more, mm, Diameter no more,mm, Quantity, no more Diameter. 



Scratches Width, not more, mm 0.025mm
Total length, not more 1/4 of total lens diameter. 
Quantity no more
Dots or spot points No more, mm 0.4mm
Quantity, no more 3
Accumulation of defects Limited area, mm 0.8mm^2
Total area of scratches and points, no more, square mm 5.8mm^2


Review of the William Optics 102 GT By Michael Hyrczyk

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