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OPTIONAL ACCESSORY CHART

The telescope does not come with the eyepiece as standard 

accessory unless you purchased a package.  

Magnification of the Telescope

Visual Configuration

When using an eyepiece with short focal length 

(small number in millimeters), the image will be dim 

and the range of sharp focus will be small.  

The image will be harder to see so begin with an 

eyepiece with long focal length (low magnification).

Dividing the focal length of the telescope by the focal 

length of the eyepiece gives the magnification.

Focusing the Telescope

Look into the eyepiece. The image will likely be out of 

focus at first. Turn the focus knob slowly clockwise or 

counterclockwise to find a point where the image in the 

field of view of the eyepiece becomes sharpest.

Eyepiece   Focal length of telescope ÷ Focal length of eyepiece = Magnification

S LV20 mm        825mm            ÷           20mm        =   4 1x

S LV  5 mm        825mm            ÷                5 mm        =   165x 

EA60mm to 50.8mm SX, or 50.8mm 

Compression Ring (Supplied)

EA60mm to 50.8mm(Optional)

Extension Tube VC

Eyepiece 

31.7mm

Eyepiece 31.7mm

Eyepiece 50.8mm

Flip Mirror Diagonal

Drawtube Lock Screw

Focus knob

Focus knob

Example: Calculating the eyepiece magnification of a telescope 

with 825mm focal length.  

OPTIONAL ACCESSORY CHART

Some of the optional accessories shown in this chart will be needed if you take pictures with (D)SLR camera, 

compact digital camera or CCD video camera. 

Photographic Configuration

AX103S

AX103S

EA60mm to 50.8mm SX,

or 50.8mm Compression 

Ring (Supplied)

Eyepiece Projection Photography

Digiscoping Photography

Prime Focus Photography 

T-C Ring

Digital Camera Quick Bracket II

(D)SLR 

Camera

T-Ring

(Appropriate 

to your camera.)

Vixen NPL or NLV 

Eyepiece 31.7mm

Compact Digital 

Camera 

/ Digital Video 

Camera

LCD / TV Monitor

CCD Imaging Camera 

(with C-mount)

EA42mm to 

31.7mm SX

(Part of Flip 

 Mirror Diagonal)

Flip Mirror Diagonal

Eyepiece Projection Camera Adapter

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