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Two-Year Limited Warranty 

This Bintel Dobsonian Reflecting Telescope is warranted against defects in materials and workmanship for a 

period of two years from the date of purchase. This warranty is for the benefit of the original retail purchaser 

only. During this warranty   The Binocular and Telescopes Shop will repair or replace, at Bintel’s option, any 

warranted instrument that proves to be defective, provided it is returned freight paid to:   

The Binocular and Telescope Shop at  

84Wentworth Park Rd  Glebe  2037 

519 Burke Rd  Camberwell   3124 

Proof of purchase (such as original invoice) is required. This warranty does not apply if, in  Bintel’s judgment, 
the instrument has been abused, mishandled, or modified, nor does it apply to normal wear and tear.  
For further details  contact  The Binocular and Telescope Shop Customer Service on  (02) 9518 7255 

 

8. Specifications  BT 252 / BT 302 

 

Bintel BT 252: 

Focal Length: 1250mm 
Aperture: 250mm 
Focal Ratio: f/5 
Mirror Coatings: aluminium with SiO overcoat. 
Minor Axis of Secondary Mirror: 63mm 
Weight: 26kgs  (tube 16kgs., base 10kgs.) 
Tube Length: 1220mm  
Tube Outer Diameter: 303mm 
Focuser: 2” Crayford design with 1.25" adapter. 
Eyepieces:  30mm  Superview  (2”),15mm  &  9mm  
Bintel Plössl, 1.25" barrel diameter, ND96 Filter 
Magnifications : 48x, 83x & 139x 
Finder Scope: 8x power, 50mm aperture,  
Finderbracket:  Dovetail  base,  spring-loaded  X-Y         
alignment 
Cooling fan and Battery Pack 

 

Bintel BT 302: 

Focal Length: 1520mm 
Aperture: 304mm 
Focal Ratio: f/5 
Mirror Coatings: aluminium with SiO overcoat 
Minor Axis of Secondary Mirror: 70mm 
Weight: 37kgs  (tube 22kg, base 15kg.) 
Tube Length: 1450mm  
Tube Outer Diameter: 360mm 
Focuser:     2"  Crayford design with 1.25" adapter. 
Eyepieces:  30mm  Superview,  2”  barrel  diameter,     
 

 

15mm & 9mm Bintel Plössl, 1.25"  

Magnification: 47x, 100x & 167x 
Finder Scope: 8x power, 50mm aperture,  
Finderbracket:  Dovetail  base,  spring-loaded  X-Y               
alignment 
Cooling Fan with Battery Pack 

TeleVue Eyepieces 

These  are  the  standard  candle  of  eyepieces  and 
come  in  various  focal  lengths.  TeleVue  eyepieces 
offer the sharpest images ..

 

 
Coloured Eyepiece Filters 

Enhance  planetary  and  lunar  images  with  coloured 
filters,  whether  it  be  the  equatorial  belts  of  Jupiter, 
dust  storms  on  Mars  or  crater  details  on  the  Moon, 
there is a filter  to  enhance the view. 

 
Full Aperture Solar Filters 

The  only  safe  way  to  observe  the  sun  is  with  a  full  
aperture  glass  solar  filter.  Sunspots,  their  umbrae, 
penumbrae become easily and safely visible. 
 

Bandpass Filters 

Cut  Light  pollution  and  enhance  Nebulae  with      
Astronomik  bandpass  filters.  CLS,  UHC,  OIII,  H-
alpha, H-beta SII filters available. Also EOS Clip in  

 
Barlow Lenses 

To  gain  magnification  without  loss  of  eye  relief,  the 
best  way  is  to  use  a  barlow  lens.  Barlow  lenses 
range in price and amplifying power. 
 

Star Charts 

Astronomy 201? 

This  annual  ephemeris  is  a  practical  guide  to  the 
night  sky.  The  most  useful  book  for  Australian     
Amateur  astronomers. 

  
Tirions Bright Star Atlas 

A  very  good  easy  to  understand  star  chart  for         
beginner to advanced astronomer alike. 
 

Sky Atlas 2000.0 2nd Edition 

A  great  set  of  star  charts available in  Field,  Desk  or 
Deluxe versions to suit all levels of astronomer. 

 
Sky Atlas 2000.0 Companion 

An invaluable partner to the Sky Atlas 2000.        
 

Telescope Computer 

Argo Navis

 

The worlds best Digital Telescope Computer.  
30,000 Objects at your fingertips.  Australian  Made.  
With Bintel Exclusive Hardware. 

 

 
 
 
 

The Binocular and Telescope Shop 

84 Wentworth Park Rd  Glebe  NSW  2037 

519 Burke Rd  Camberwell   VIC  3124 

Phone:(02) 9518 7255 in NSW (03) 9822 0033 in VIC 

Email: [email protected] 

Web: www.bintel.com.au 

9. Suggested Accessories 

Bintel Plossl Eyepieces 

Bintel  Plossl  eyepieces  provide  sharp,  50°  apparent 
field  with 1.25” barrels. Available in 40mm, 32mm, 
20mm, 15mm, 12mm, 9mm, 6mm 
 

Bintel Wide Angle Eyepieces   2”

 

65°    Field  of  View.    Sharp  images,  ghost  free        
images.   Available in 40mm, 32mm,. 
 

Summary of Contents for BT 152

Page 1: ...ANUAL THE BINOCULAR AND TELESCOPE SHOP 84 Wentworth Park Rd Glebe NSW 2037 519 Burke Rd Camberwell VIC 3124 Email info bintel com au WWW www bintelshop com au www bintel com au BINTEL TELESCOPES DOBSO...

Page 2: ...practice a little patience and a reasonably dark sky away from city lights you ll find your telescope to be a never ending source of wonder exploration and relaxation For after sales service or frien...

Page 3: ...9518 7255 for assistance Box 2 Dobsonian Base Qty Description 1 Left panel 1 Right panel 1 Front brace 1 Top baseplate has countersunk holes in it 1 Ground baseplate 2 Metal disks 1 Roller Bearing Ma...

Page 4: ...wrench to tighten the screws Do not com pletely tighten the screws yet See image be low Note Be sure that the Predrilled holes for the eyepiece rack are on the LEFT of the rocker box as view from the...

Page 5: ...titude Bearing in posi tion so that the screws will screw into the Brass Nuts Altitude Bearing Fitted 5 One side panel has 2 small pre drilled holes for mounting the Eyepiece Rack Attach the Eyepiece...

Page 6: ...cts to view in the night sky The 8 means it magnifies 8 times the 50 means it has a 50mm diameter lens It shows around 5 degrees of sky Before attaching the finder scope bracket to the telescope tube...

Page 7: ...crosshairs The finderscope is an invaluable tool for locating objects in the night sky its usage for this purpose will be discussed later in detail Focusing the FinderScope If when looking through th...

Page 8: ...nd remove the eyepiece Place it in the eyepiece rack if you wish Insert the 9mm eyepiece into the 1 25 eyepiece adapter then retighten the thumb screw If you were careful not to bump the telescope the...

Page 9: ...r collimating tool goes into the focuser like an eyepiece with the bottom end out The Bintel Deluxe Laser Collimator can also be used It comes with it s own instruction manual Aligning the Secondary M...

Page 10: ...oosen i e rotate counter clockwise each collimation thumb screw too much or the thumb screw will completely unthread from the mirror cell Rather try tightening the other two collimation thumb screws O...

Page 11: ...s and star clusters or even very many stars for that matter Your eyes take about 30 minutes to reach perhaps 80 of their full dark adapted sensitivity Many observers notice improvements after several...

Page 12: ...rt with a low power wide field and then work your way up in magnification If the object looks better try an even higher magnification If the object looks worse then back off the magnification a little...

Page 13: ...pect these subjects to appear like the photographs you see in books and mag azines most will look like dim gray smudges How to Find Deep sky Objects Starhopping Starhopping as it is called by astronom...

Page 14: ...er 4 NGC 6121 is a bright Globular Cluster with a line of 10th magnitude stars running north south through it By using the low power and moving one field at a time many objects will be found In the su...

Page 15: ...ed into place Handle the entire assembly carefully by the holder only do not touch the mirror surface You can clean the secondary mirror in its holder by following the same procedure described below f...

Page 16: ...t Dovetail base spring loaded X Y alignment Cooling Fan with Battery Pack TeleVue Eyepieces These are the standard candle of eyepieces and come in various focal lengths TeleVue eyepieces offer the sha...

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