My First telescope purchase Suggession

2549 views
10 replies
1 rating 2 rating 3 rating 4 rating 5 rating
  • Member since
    May, 2013
My First telescope purchase Suggession
Posted by Abhishek on Saturday, May 11, 2013 12:06 PM

Hello all , i am new to forum and this my First Post ,

I am looking many online website in India to purchase my first telescope

Please Suggest from the following  ,

1)STAR TRACKER 114 AZ1
D=114 / F=900mm AZ Reflector . . . . Rs. 7,500

http://www.tejraj.com/sky-114az.html

2)BKP1149EQ1 ....Black Diamond
D=114 / F=900mm parabolic reflector. . . . Rs. 9,660

http://www.tejraj.com/reflectors-sk1149.html

3)KONUSPACE-7 D=60mm/F=900mm Refractor Rs 8,400

http://www.tejraj.com/konuspace7.html

3) STAR TRACKER 114 EQ2       (Eq2 higher version mount)
D=114 / F=900mm (EQ2) reflector. . . . Rs. 9660

http://www.tejraj.com/sky-114eq.html

Note : I liked STAR TRACKER 114 AZ1
D=114 / F=900mm AZ Reflector . . . . Rs. 7,500  which is cheap and have Good Diameter, many online suggest to get Telescope with big Diameter, since it can focus more light

Q) Is  STAR TRACKER 114 AZ1  ok to purchase ?

Q) Should i buy any other additional eyepiece or any with the Telescope-Suggested Accessories by that website for the telescope is

[code]

  • Baader Solar Filter (off-axis) Germany . . . . Rs. 930
  • R-G Solar filter (USA) provide more pleasing and natural Yellow-Orange image of the Sun . . . . Rs 1200
  • MOON FILTER . . . . Rs 510
  • Planet View filter each . . . . Rs 510
  • WEBCAM Adapter 1.25" OD.. Rs 660
  • T-C Video /Film Adapter . . . . Rs 660
  • T- Ring . . . . Rs 660 to Rs 2640
  • T- Adapter plus 2X ( Standardcamera adapter plus 2X telephotography)  . . . .Rs 1200
  • Universal A-focal / Digital camera adapter . . . . Rs 930
  • Universal A-focal / Par-focal cam-cord adapter . . . . Rs 1200
  • 38mm Astro Eyepiece . . . . Rs 510
  • 32 mm Astro Eyepiece . . . . Rs 510
  • 20 mm Astro Eyepiece . . . . Rs 510
  • 16 mm Astro Eyepiece . . . . Rs 510
  • 12 mm Astro Eyepiece . . . . Rs 510
  • 6mm Astro Eyepiece . . . . Rs 660
  • Focal reducer . . . . Rss 660
  • Magna View 1.5X . . . . Rs 660
  • CARRY BAG . . . Rs 660
  • CARRY BAG Padded . . . . Rs 1560[/code]

Q)Should i buy extra accessories like

Planet filter , Eyepiece 38x , focal reducer , magna view , can i get idea about these filter and magna view

Note : I am not in This field by profession , but i am interested stargazing

sry if i posted in wrong section , Cant find many forums dedicated for stargazing /telescopes

d

Note: Please dont suggest other website , only Tejas , Planing to buy from Indian Shop/Online seller only

  • Member since
    November, 2009
Posted by Poppa Chris on Monday, May 13, 2013 9:02 AM

The 114 AZ1 at approx. f/8 is a sufficient scope for a beginner with a casual obsrvation of brighter things like the Moon, planets, and some nebulae.  There are better options out there for wide-field work, such as open clusters and star clouds.

But as you budget, you should keep in mind that aquiring the accessories you neeed or want can easily double the purchase price.  

Ask yourself what your goals are in this hobby; casual observing, more serious observing, Moon,planets and brighter nebulae, deep sky nebulae or other objects, photography.  Once you have narrowed the scpe of your desires a bit, let us know and we can help you with some more targeted answers.

---Poppa Chris---

Denham Springs, Louisiana USA

"Second star to the right - Then straight on until morning!" - Peter Pan

Celestron CPC1100GPS (XLT) - 279mm aperature, 2800mm Focal length. (f10) Celestron Ultima LX (70deg AFOV) Eyepieces 32mm thru 5mm, Canon EOS Rebel T2i DSLR, Backyard EOS imaging software, Orion Star Shoot Planetary Imager IV, Celestron Skymaster 15x70 binoculars

 

  • Member since
    May, 2013
Posted by Abhishek on Monday, May 13, 2013 1:03 PM

Thank you for replying

But as you budget, you should keep in mind that aquiring the accessories you neeed or want can easily double the purchase price.  

 1)   Sir , My buget is below 8500 Rs , can extent to upto max 9500 if the extra money worth it

 2) Sir i don't want all those accessories , was asking is there any Must buy accessories in that list ? like to observe moon , which is the closest to earth , do i require moon filter[Saw in video , with moon filter i can observer craters in moon ,

Ask yourself what your goals are in this hobby; casual observing, more serious observing, Moon,planets and brighter nebulae, deep sky nebulae or other objects, photography.  Once you have narrowed the scpe of your desires a bit, let us know and we can help you with some more targeted answers.

3)I am working in IT field and  i am looking into stargazing as extra time activity,like weekend


But i Rate 5/10    [where 10=Serious observing & 0 =Least observing ] ,


4) Photography ?  Currently No , so wont be needing

  • WEBCAM Adapter 1.25" OD.. Rs 660
  • T-C Video /Film Adapter . . . . Rs 660    , BUT i will look into it in future , Once i am more experienced

I found few more Indian Websites selling telescopes

1)http://www.tejraj.com/sky-114az.html

2)http://www.galileotelescope.com/productsdetails.php?pro_id=178

3)http://www.spacearcade.in/114mm-reflector-telescope.html

----Not sure if i am checking correctly but i cant find bigger diameter telescope in below 10k Indian Rupee


Best i can find is

1)STAR TRACKER 114 AZ1
D=114 / F=900mm AZ Reflector . . . . Rs. 7,500

http://www.tejraj.com/sky-114az.html

and its Equitorial Mount version

3) STAR TRACKER 114 EQ2       (Eq2 higher version mount)
D=114 / F=900mm (EQ2) reflector. . . . Rs. 9660

1) if suggesting Above Mount is Az mount ok for my requirement ? and use the extra money 2160 [9660-7500] for extra upgrades ?

Please suggest , dont want to mess my first purchase

Thank you again for helping me decide



    



  • Member since
    November, 2009
Posted by Poppa Chris on Monday, May 13, 2013 1:41 PM

For visual use only Alt-Az mounts are just fine.  Equiitorial mounts are more expensive and really only needed to prevent image field rotation for photography.

The 900mm focal length /114mm aperture = f/7.9 which is a moderate factor that will allow a wide range of objects.

I will assume the scope comes with one eyepiece. For sake of this discussion I will assume it is 25mm.

Focal length of scope/focal lenght of eyepiece = magnification therefore 900 / 25 = 36X

This is relatively low to medium low power.  Sufficient to see Jupiter and its Gallilean moons or a limitied view of the rings of Saturn.  It will probably be best on viewing the Moon.  So whet you need next are additional eyepieces.  I would suggest:

40mm (22.5X) for wider fields of view such as the Pleiades, etc.

10mm (90X) for higher powered view of cloud bands on Jupiter, the Cassini division of Saturn's rings, etc.

a 2X Barlow this will essentially let your 3 eyepieces  work for 6 magnifications.

Let's run this down:

40mm = 22.5X   with Barlow = 45X

25mm = 36X      with Barlow = 72X

10mm   = 90X    with Barlow = 180X

The 114 will have a maximum useful magnification of 225X but you wil achieve this only on the best of nights so it doesn't pay to push any higher than the 180X, although you could add an 8mm EP to the above to get 110X and 220X as you gain experience.  In general, you should avoid zoom eyepieces as they typically will not produce very good views unless you spend more than your total allowd budget on th the single eyepiece.

Other accessories:  A unity or "Red dot" finder such as a Telrad or Reflex finder will be much easier to use than the typical 6x30 finders that come with small aperture scope.

"Sky and Telescope's Pocket Sky Atlas" and "Turn Left at Orion" to help you find those targets in the sky.  And a red flashlight to preserve your night vision when consulting these references in the field.

Really, that should do it to get you up and running in the hobby.  

---Poppa Chris---

Denham Springs, Louisiana USA

"Second star to the right - Then straight on until morning!" - Peter Pan

Celestron CPC1100GPS (XLT) - 279mm aperature, 2800mm Focal length. (f10) Celestron Ultima LX (70deg AFOV) Eyepieces 32mm thru 5mm, Canon EOS Rebel T2i DSLR, Backyard EOS imaging software, Orion Star Shoot Planetary Imager IV, Celestron Skymaster 15x70 binoculars

 

  • Member since
    May, 2013
Posted by Abhishek on Monday, May 13, 2013 2:28 PM

WOW, thank you for spending your time and writing detailed info


1) For visual use only Alt-Az mounts are just fine.  Equiitorial mounts are more expensive and really only needed to prevent image field rotation for photography.

Thank you , that means i can save some money for extra addons


2) I will assume the scope comes with one eyepiece. For sake of this discussion I will assume it is 25mm.Focal length of scope/focal lenght of eyepiece = magnification therefore 900 / 25 = 36X


http://www.tejraj.com/sky-114az.html


Eyepiece 1.25"OD
1) K-25mm efl, 2) K-10mm efl, 3) SR 4mm
Magnification with eyepiece 36x, 90x and 225x
3x Barlow

K-25mm:  108x
K-10mm:  270x
SR-4mm:  675x

1.5X Terrestrial Erecting Eyepiece 54x, 135x and 337.5x

Quoted from Tejas , it comes with 36x/90x/225x Eyepiece , 3 set  [I will mail and reconfirm ]

Highest they have for sale is 38mm Astro Eyepiece . . . . Rs 510


3) a 2X Barlow this will essentially let your 3 eyepieces  work for 6 magnifications.

http://www.tejraj.com/sky-114az.html

This one comes with

3x Barlow , so 3x
4 ) although you could add an 8mm EP to the above to get 110X and 220X as you gain experience


THe telescope set comes with

1.5X Terrestrial Erecting Eyepiece 54x, 135x and 337.5x
 
which means i can get Erect Image for terrestrial viewing rite? if i needed ?
5) "Sky and Telescope's Pocket Sky Atlas" and "Turn Left at Orion" to help you find those targets in the sky.  And a red flashlight to preserve your night vision when consulting these references in the field.
These are the freebees offered



THank you again for helping me


Extra Info : Telescope Specfication

TELESCOPE SPECIFICATION
Optical Design
Newtonian Reflector.
Diameter
114mm
Focal Length 900mm
Secondary Mirror Diameter ------
Focal Ratio F/ 7.8
Highest Practical Power 269x
Faintest Steller Magnitude 12.8
Resolving Power
1 Arc - Seconds.
Focuser diameter RACK-AND-PINION Focuser 1.25".
Eyepiece 1.25"OD
1) K-25mm efl, 2) K-10mm efl, 3) SR 4mm
Magnification with eyepiece 36x, 90x and 225x
3x Barlow

K-25mm:  108x
K-10mm:  270x
SR-4mm:  675x

1.5X Terrestrial Erecting Eyepiece 54x, 135x and 337.5x
Finder
6x30
Filter 1.25" Lunar filter
Mount type
Altazimuth Mount
Slow-motion Control Vertical
Accessories Tray No-Tool Tray with Eyepiece holder
Tube Weight 3 kg
Tube dimension 15cm Dia, x 87cm length
Shipping Weight
Within 9 Kg
Shipping Carton Dimension

96 x 29.5 x 26.5 cm3


@mods - Thanks , finally i don't have to wait for Post Approval




  • Member since
    November, 2009
Posted by Poppa Chris on Monday, May 13, 2013 3:37 PM

Abhishek

WOW, thank you for spending your time and writing detailed info

You're welcome.

1) For visual use only Alt-Az mounts are just fine.  Equiitorial mounts are more expensive and really only needed to prevent image field rotation for photography.

Thank you , that means i can save some money for extra addons  Correct. 

2) I will assume the scope comes with one eyepiece. For sake of this discussion I will assume it is 25mm.Focal length of scope/focal lenght of eyepiece = magnification therefore 900 / 25 = 36X

http://www.tejraj.com/sky-114az.html


Eyepiece 1.25"OD
1) K-25mm efl, 2) K-10mm efl, 3) SR 4mm All 3 of these EPs are of outdated and lower quality designs.  Although they are of the correct focal lengths, i would opt for some standard Plossl designs instead of these. 
Magnification with eyepiece 36x, 90x and 225x
3x Barlow

K-25mm:  108x
K-10mm:  270x
SR-4mm:  675x  3X Barlow is too high for this 114mm Scope. The views at anything over 250X will be very distorted, shaky and aberrated.  2x is much better.  You will never achieve a useful view at 675X with this telescope.  270X would be exceptionally lucky only on the rarest of occasions.

1.5X Terrestrial Erecting Eyepiece 54x, 135x and 337.5x

Quoted from Tejas , it comes with 36x/90x/225x Eyepiece , 3 set  [I will mail and reconfirm ]

Highest they have for sale is 38mm Astro Eyepiece . . . . Rs 510  Close enough...

3) a 2X Barlow this will essentially let your 3 eyepieces  work for 6 magnifications.

http://www.tejraj.com/sky-114az.html

This one comes with

3x Barlow , so 3x  Too much conversion.  Will boost your magnifications beyond your scope's abilities.  Advertising very high magnifications is a typical sales ploy to sell scope to unwitting newcomers.  Try not to fall into this trap.  Read your specs below:  269X is highest useful magnification for this scope, and that will only be in superbly ideal conditions.  90-120X will be much more common.  In fact, with this scope you will soon learn that around 75X is more useful. 

 
4 ) although you could add an 8mm EP to the above to get 110X and 220X as you gain experience
THe telescope set comes with
1.5X Terrestrial Erecting Eyepiece 54x, 135x and 337.5x
 
which means i can get Erect Image for terrestrial viewing rite? if i needed ?  Correct.
5) "Sky and Telescope's Pocket Sky Atlas" and "Turn Left at Orion" to help you find those targets in the sky.  And a red flashlight to preserve your night vision when consulting these references in the field.
These are the freebees offered
The following items are FREE with the telescope listed above.

THank you again for helping me

Extra Info : Telescope Specfication

 

TELESCOPE SPECIFICATION
Optical Design
Newtonian Reflector.
Diameter
114mm
Focal Length 900mm
Secondary Mirror Diameter ------
Focal Ratio F/ 7.8
Highest Practical Power 269x
Faintest Steller Magnitude 12.8
Resolving Power
1 Arc - Seconds.
Focuser diameter RACK-AND-PINION Focuser 1.25".
Eyepiece 1.25"OD
1) K-25mm efl, 2) K-10mm efl, 3) SR 4mm  You will probably want to replace these with better ones in the future
Magnification with eyepiece 36x, 90x and 225x
3x Barlow

K-25mm:  108x
K-10mm:  270x  Limited Use
SR-4mm:  675x Will never use.

1.5X Terrestrial Erecting Eyepiece 54x, 135x and 337.5x  337X may be used here since sharp detail won't be as critical, but be prepared for image to be very jumpy. 
Finder
6x30  Get a red-dot unity finder.
Filter 1.25" Lunar filter OK
Mount type
Altazimuth Mount
Slow-motion Control Vertical
Accessories Tray No-Tool Tray with Eyepiece holder
Tube Weight 3 kg
Tube dimension 15cm Dia, x 87cm length
Shipping Weight
Within 9 Kg  Only 9Kg?  Tripod mount may be very flimsy.
Shipping Carton Dimension

96 x 29.5 x 26.5 cm3


@mods - Thanks , finally i don't have to wait for Post Approval

Bottom line: 

I worry about the overall quality of the scope you have selected.  Instead of this scope with its questionable eyepieces, etc.  Try shopping for a Dobsonian mount reflector.  The quality would be much better. The mount is much more stable and the cost may even be very comparable.  I know you stated "India only" but you should shop around a bit more.  Orion telescopes has a fine selection of beginner's Dobs that are very reasonable and of good quality.



---Poppa Chris---

Denham Springs, Louisiana USA

"Second star to the right - Then straight on until morning!" - Peter Pan

Celestron CPC1100GPS (XLT) - 279mm aperature, 2800mm Focal length. (f10) Celestron Ultima LX (70deg AFOV) Eyepieces 32mm thru 5mm, Canon EOS Rebel T2i DSLR, Backyard EOS imaging software, Orion Star Shoot Planetary Imager IV, Celestron Skymaster 15x70 binoculars

 

  • Member since
    May, 2013
Posted by Abhishek on Thursday, May 16, 2013 8:32 AM

Sir , i have shortlisted few telescope in Below 10k  Indian Rupees and 2 in Below 16k Please select the best

. I have commented in Brown color based on formuale you used above

1 )STAR TRACKER 135/900 EQ  D=135 / F=900mm parabolic reflector. . . . Rs. 15600

[code]http://www.tejraj.com/sky1359eq.html[/code]

TELESCOPE SPECIFICATION
Optical Design
Newtonian Reflector. Diffraction limited resolution and higher reflectivity coating
Diameter
135mm (catch more light than 114mm)
Focal Length 900mm
Mirror Cell Stability treated die-cast alluminum
Secondary Mirror 36mm
Focal Ratio F/ 6.6
Highest Practical Power 265
Faintest Steller Magnitude 12.7
Resolving Power
0.86 Arc - Seconds.
Light gathering power 270
Finder Scope
Red Dot finder with two-position brightness control
Focuser diameter 1.25" Helical rack and pinion moment
Eyepiece 1.25"OD
1) F20mm efl, 2) F6mm efl,
Magnification with eyepiece 45x and 150x 
Variable Barlow 1.25"OD

20mm: 67.50x, 90x, 112.5x, 135x

6mm: 225x, 300x, 375x, 450x  -[135*2=270(max useful mag)

Note: Not sure good about Variable Barlow Quality

Mount type
Equatorial  :)
Slow-motion Control RA & DEC with flexible micro-adjustment rods
Counter weight Set 2p  :  1.5Kg / 1.5Kg
Accessories Tray redesigned to aid tripod stability
Tube Weight 4 kg
Tube dimension 170cm Dia, x 82cm length
Net weight 12 Kg
Shipping Weight
Within 13.5 Kg
Shipping Carton Dimension 114 x 61 x 18.5 cm3

FREEBEES

2) STAR TRACKER 135 / 1100  FS AZ   D=135 / F=1100mm parabolic reflector. . . . Rs. 16,500

http://www.tejraj.com/sky135fsaz.html

TELESCOPE SPECIFICATION
Optical Design
Newtonian Reflector.
Diameter
135mm  (Catch More light than 114mm)
Focal Length 1100mm  [Higher focal Length = Higher magnification with Eyepiece
Mirror Cell Stability treated die-cast alluminum, provide better and stable alignment.
Secondary Mirror Diameter 36
Focal Ratio F/ 8
Highest Practical Power 270
Faintest Steller Magnitude 12.7
Resolving Power
0.9 Arc - Seconds.
Finder Scope
Red Dot finder with two-position brightness control
Focuser diameter 1.25" Helical rack and pinion moment
Eyepiece 1.25"OD
1) HR20mm efl, 2) HF6mm efl,
Magnification with eyepiece 55x and 183.3x
Variable Barlow 1.25"OD

20mm: 82.50x, 110x, 137.50x, 165x

6mm: 274.95x, 366.6x, 458.2x, 549.9x [135*2=270  (max usefull magnification )

Mount type
Free style Alt-Az mount with micro-adjustment on both directions.[Alt Z Mount ONLY :(
Tripod Fast setup Metal Tripod, with 1.5" and 1.25" tube, 630mm - 1080mm height
Counter weight 5Kgs x 2set. To balance the telescope at any angle for convenient tracking object.
Accessories tray Specially design to enhence stability of the tripod, support load up to 40 KG.
Tube Weight with AZ mount 4.75 Kg
Tube dimension 17cm Dia, x 102cm length
Net weight 20 Kg
Shipping Weight
Within 22 Kg
Shipping Carton Dimension 114 x 61 x 18.5 cm3

BELOW 12k PRICE SERIES

3)  STAR TRACKER 114 EQ2       (Eq2 higher version mount)
D=114 / F=900mm (EQ2) reflector. . . . Rs. 9660

TELESCOPE SPECIFICATION
Optical Design
Newtonian Reflector.
Diameter
114mm
Focal Length 900mm
Secondary Mirror Diameter ------
Focal Ratio F/ 7.8
Highest Practical Power 269x [Note sure what this means , taught max usefull mag is 228(114x2 ) Before image get too much distorted
Faintest Steller Magnitude 12.8   (better than 12.7(able to see fainter object)
Resolving Power
1 Arc - Seconds.
Focuser diameter RACK-AND-PINION Focuser 1.25".
Eyepiece 1.25"OD
1) K-25mm efl, 2) K-9mm efl, 3) SR 4mm
Magnification with eyepiece

36x, 100x and 225x [114*2=228 , so if i use 4mm E piece , i get almost max magnificaiton ]   ,

Think SR

3x Barlow Lens

K-25mm:  108x
K-10mm:  270x
SR-4mm:  675x

Think useless since i am able to get max magnification even without Barlow by using EYepiece 4mm

1.5X Terrestrial Erecting Eyepiece 54x, 135x and 337.5x Can see earthly objects
Finder
6x30
Filter 1.25" Lunar filter
Mount type
EQUATORIAL EQIII  (EQ2) Heavy verdsion  good :)
Slow-motion Control RA & DEC
Counter weight 2.5Kgs
Accessories Tray No-Tool Tray with Eyepiece holder
Tube Weight 3 kg
Tube dimension 15cm Dia, x 87cm length
Shipping Weight
Within 14.5 Kg
Shipping Carton Dimension 94.5 x 39 x 27 cm3

4) STAR TRACKER 127 EQ D=127 / F=900mm EQ reflector. . . . Rs. 12,000


http://www.tejraj.com/sky-127eq.html

TELESCOPE SPECIFICATION
Optical Design
Newtonian Reflector.
Diameter
127mm
Focal Length 900mm
Secondary Mirror Diameter ------
Focal Ratio F/ 7
Highest Practical Power 300x  [Again not sure about this since 127*2=254
Faintest Steller Magnitude 13
Resolving Power
0.9 Arc - Seconds.
Focuser diameter RACK-AND-PINION Focuser 1.25".
Eyepiece 1.25"OD
1) K-25mm efl, 2) K-9mm efl, 3) SR 4mm
Magnification with eyepiece 36x[900/25], 100x and 225x(900/4)
3x Barlow Lens

K-25mm:  108x
K-10mm:  270x
SR-4mm:  675x

1.5X Terrestrial Erecting Eyepiece 54x, 135x and 337.5x
Finder
5x24
Filter 1.25" Lunar filter   added bonus
Mount type
EQUATORIAL EQ  :)
Slow-motion Control RA & DEC
Counter weight 2.5Kgs
Accessories Tray No-Tool Tray with Eyepiece holder
Tube Weight 3 kg
Tube dimension 15cm Dia, x 87cm length
Shipping Weight
Within 15 Kg
Shipping Carton Dimension 95 x 38 x 25.5 cm3

====================

====================

Disadvantages -

1)All the above are non Plossal desgin's  i think

2) Barlow lens in some of the above scope are useless since barlow is providing magnificaiton above scope's range  , but might be usefull to watch early view's

So after having all these disadvantages please suggest one telescope which is Most Value for money [Note- I can buy eyepiece with saved money]

Note : Please suggest the ABove 10k Model if they have huge gain over Below 10k Model

or Suggest one in Above 10k Model and one in Below 10k model ,




Edit

-Got price of PLossl eyepiece :( they are really expensive

ASTRO EYEPIECE 1.25" OD
Rs 510  38mm efl 1.25" OD
Rs 510  32mm efl 1.25" OD
Rs 510  25mm efl 1.25" OD
Rs 510  20mm efl 1.25” OD
Rs 510 16mm efl 1.25" OD
Rs 510  12mm efl 1.25" OD
Rs 510  9mm efl 1.25" OD
Rs 840 6mm efl 1.25” OD
Rs 30  soft winged eye-guard
Rs 660 Refractor Collimator
SUPER PLOSSL
Rs 3000  40mm plossl eyepiece
Rs 3000  32mm plossl eyepiece
Rs 2460  25mm plossl eyepiece
Rs 2460  10mm plossl eyepiece
Rs 2460  6.3 mm plossl eyepiece (KONUS)
Rs 2460  4mm plossl eyepiece (KONUS)
Rs 50 soft winged eye-guard for imported eyepiece
Rs 660 1.25”Extension Tube (1.25” OD)

Rs 3900  40mm plossl eyepiece (ORION)
Rs 3630  32mm plossl eyepiece (ORION)
Rs 2640  25mm plossl eyepiece (ORION)
Rs 2640  10mm plossl eyepiece (ORION)


Other accessories

ACCESSORIES .965" OD
Rs 660  F 6mm efl .965" OD
Rs 660 H 8mm efl .965” OD
Rs 660 H 12.5mm efl .965” OD
Rs 660 HM 25mm efl .965” OD
Rs 210 2X Barlow lens .965” OD
Rs 210 3X Barlow lens .965” OD
Rs 408  terrestrial erecting eyepiece 1.5x .965” OD for Refractor.

BARLOW LENS
Rs 300 2X Barlow lens .965” OD
Rs 510  2X Barlow lens 1.25" OD SKYWATCHER (imported)
Rs 840 3X BARLOW LENS 1.25" OD . . . .(imported)
(T-Thread for direct camera attachment)
Rs 510  4X Barlow lens 1.25" OD
Rs 510  variable Barlow (1.5x=2x=2.5x=3x) 1.25" OD
No stock  2X Achromatic Barlow lens 1.25" OD

  • Member since
    November, 2009
Posted by Poppa Chris on Thursday, May 16, 2013 8:59 AM

Based solely on your criteria and the scopes offered above my first choice would be"

STAR TRACKER 135/900 EQ  D=135 / F=900mm parabolic reflector. . . . Rs. 15600

My second choice would be:

STAR TRACKER 127 EQ D=127 / F=900mm EQ reflector

But I must state once again that I feel you would be better off buying a Dobsonian mount Newtonian Reflector of rroughly the same aperture or greater, and one without all of the useless accessories that the above are loading the package with just to make the unsuspecting buyer think he is getting a bargain.

Ask yourself the question: Who is the manufacturer of these "Star Tracker" scopes?  I can tell you that they are NOT one of the leading quality manufacturers.  Select one of the two I mentioned if you must, but know that I sense a certain lack of quality in the packages you present.  Personally, I would continue shopping.

---Poppa Chris---

Denham Springs, Louisiana USA

"Second star to the right - Then straight on until morning!" - Peter Pan

Celestron CPC1100GPS (XLT) - 279mm aperature, 2800mm Focal length. (f10) Celestron Ultima LX (70deg AFOV) Eyepieces 32mm thru 5mm, Canon EOS Rebel T2i DSLR, Backyard EOS imaging software, Orion Star Shoot Planetary Imager IV, Celestron Skymaster 15x70 binoculars

 

  • Member since
    May, 2013
Posted by Abhishek on Thursday, May 16, 2013 9:57 AM

Cheapest Dobsonian mount available is 

Orion SkyQues XT4.5 Classic Dobsonian Telescope
D=114 / F=900mm Dobsonian reflector. . Rs. 18,300

http://www.tejraj.com/orionclassic.html

checked other Sites also , starting price is above 20,000 Rs

eneral Benefits
Best for viewing
Bright deep sky
Best for imaging
Lunar & planetary
User Level
Beginner
Optical Specifications
Optical design
Reflector
Optical; diameter
114mm
Focal Length
900
Focal ratio f7.9
Optical type
spherical
Glass material
Soda-lime plate
Eyepieces
Sirius Plössl 25.0mm, 10.0mm
Magnification with included eyepieces 36x, 91x
Resolving power   1.02arc*sec
Lowest useful magnification 17x
Highest useful magnification 228x
Highest theoretical magnification 228x
limiting stealler magnitude 12.9
Optical Quality Diffraction limited
finder scope 6x26 Correct-image
Focuser 1.25" Rack-and-pinion
Secondary mirror obstruction 28mm
Secondary mirror obstruction by diameter 24%
Secondary mirror obstruction by area 6%
Mirror coatings/over-coatings Aluminum & Silicon Dioxide
Mount type
Dobsonian
Bearing material PTFE and UHMW bearings
Tube material Steel
Tripod material Wood
Length of optical tube 35.0 in.
Weight, fully assembled 17.6 lbs.
Additional included accessories
Collimation cap, Eyepiece rack
Other features CorrecTension system, Navigation knob, Integral carry hsandle
 
The following items are FREE with the telescope listed above.

I can see this one have Plossil eye piece but got 114 mm diameter only

  • Member since
    November, 2009
Posted by Poppa Chris on Thursday, May 16, 2013 10:17 AM

Orion is a good and trusted name.  The XT 4.5 is simple to set up, use and care for. It comes with 2 plossls - 25mm and 10mm.  It is a very good scope for a beginner.  You will be pleased with it for many years.  I would much rather see you purchase it than any of the previous scopes you mentioned.

Most of the other accessories are OK, especially the collimation tool, but they should not be why you choose one scope over another.  Accessories can be purchased seperately at any time as you find a need for them. The worst thing you can do is get a scope that is difficult to use or performs poorly.  That will ruin the hobby for you not to mention cost you a good deal of money.

---Poppa Chris---

Denham Springs, Louisiana USA

"Second star to the right - Then straight on until morning!" - Peter Pan

Celestron CPC1100GPS (XLT) - 279mm aperature, 2800mm Focal length. (f10) Celestron Ultima LX (70deg AFOV) Eyepieces 32mm thru 5mm, Canon EOS Rebel T2i DSLR, Backyard EOS imaging software, Orion Star Shoot Planetary Imager IV, Celestron Skymaster 15x70 binoculars

 

  • Member since
    January, 2014
Posted by addhaneshwar on Tuesday, January 28, 2014 1:14 PM

Hello Abhishek...

I am also planning to buy a telescope from Tejraj. So I am just curious, which telescope did you brot? Can you give me some suggestions?

Join our Community!

Our community is FREE to join. To participate you must either login or register for an account.

ADVERTISEMENT

FREE EMAIL NEWSLETTER

Receive news, sky-event information, observing tips, and more from Astronomy's weekly email newsletter.

ADVERTISEMENT
ADVERTISEMENT
Find us on Facebook

Loading...