Results 1 to 4 of 4
  1. #1
    njmcgregor0909's Avatar
    njmcgregor0909 is offline White Dwarf
    Points: 1,780, Level: 25
    Level completed: 80%, Points required for next Level: 20
    Overall activity: 0%
    Achievements:
    365 Days+ Registered Achievement!First 1000 Experience Points750 Days+ Registered Achievement!1000 Days+ Registered Achievement!3 Years + Achievement
    Join Date
    Jan 2011
    Location
    Boise, ID
    Posts
    1
    Points
    1,780
    Level
    25
    Thanks
    0
    Thanked 0x 0 Posts

    Default Orion 10-inch f/3.9 Newtonian Astrograph Reflector vs. Orion SkyQuest XT12g GoTo Dob



    I'm an undergraduate student double majoring in astronomy and physics, and I am looking at getting a telescope for personal enjoyment as well as research. This is my first telescope, and I need it to last me through undergrad and early grad school.

    I've been going back and forth on the Orion 10-inch f/3.9 Newtonian Astrograph Reflector (with an Orion Atlas Mount) OR the Orion SkyQuest XT12g GoTo Dob (I've posted the specs below). I have a real interest in astrophotography and it might prove useful in research so the 10" is appealing. However, I know that aperture rules and the 12" has that 2" more of aperture that would really be nice in gathering that extra light when I'm in the country. Transportation shouldn't be a problem for either the 10" or 12" just fyi. I'm sure the 12" will be a challenge by I'm a young male in good health so I'm not too worried.

    So when it comes down to it...which telescope is better? Is the 10" Newtonian Astrograph Reflector going to have descent optics for astrophotography or should I stick to the more powerful Orion SkyQuest XT12g GoTo Dob? How much difference will I truly see between the 10" vs. the 12"? Thanks for your help! I really appreciate it!

    Orion 10-inch f/3.9 Newtonian Astrograph Reflector Specs
    Use Astronomy
    User level Advanced
    Optical design Reflector
    Optical diameter 254mm
    Focal length 1000mm
    Focal ratio f/3.9
    Optics type Parabolic
    Glass material Low thermal expansion glass
    Resolving power 0.46arc*sec
    Lowest useful magnification 25x
    Highest useful magnification 300x
    Limiting stellar magnitude 14.7
    Optical quality Diffraction limited
    Finder scope 9x50
    Focuser 2in. dual-speed Crayford
    Secondary mirror obstruction 82mm
    Secondary mirror obstruction by diameter 32%
    Secondary mirror obstruction by area 10%
    Mirror coatings/over-coatings Enhanced Aluminum and Silicon Dioxide
    Mount style Optical Tube without Mount
    Astro-imaging capability Lunar, planetary and long exposure
    Tube material Steel
    Length of optical tube 38.6 in.
    Weight, optical tube 25.5 lbs.
    Additional included accessories Tube rings, Cooling accelerator fan, 2in. to 1.25in. adapter
    Other features Primary mirror center mark, Extended tube in front of focuser, Quick collimation cap
    Warranty One year

    Orion SkyQuest XT12g GoTo Dob Specs
    Use Astronomy
    User level Advanced
    Optical design Reflector
    Optical diameter 305mm
    Focal length 1500mm
    Focal ratio f/4.9
    Optics type Parabolic
    Glass material Low thermal expansion glass
    Eyepieces included DeepView 28.0mm (2in.), 12.5mm (1.25in.)
    Magnification with included eyepieces 54x, 120x
    Resolving power 0.38arc*sec
    Lowest useful magnification 43x
    Highest useful magnification 300x
    Limiting stellar magnitude 15.1
    Optical quality Diffraction limited
    Finder scope EZ Finder II
    Focuser 2in. dual-speed Crayford
    Secondary mirror obstruction 70mm
    Secondary mirror obstruction by diameter 23%
    Secondary mirror obstruction by area 5%
    Mirror coatings/over-coatings Aluminum and Silicon Dioxide
    Mount style Dobsonian
    Astro-imaging capability Simple moon shots
    Motor drive compatibility Clock drive included
    Computerized compatibility Go-To included
    Alignment procedure 2-Star Alignment, Brightest Star
    Number of objects in database 42,900
    Tracking rates Sidereal, Solar and Lunar
    Motor type DC Servo motors with encoders
    Bearing material AZ: Thrust needle bearings ALT: Ball bearings
    Power requirement 12-volt DC - 2A (tip positive)
    Available ports RS-232, Aux
    Tube material Steel
    Tripod material Wood
    Length of optical tube 58.3 in.
    Weight, optical tube 48.9 lbs.
    Weight, mount/tripod 52.9 lbs.
    Weight, fully assembled 101.8 lbs.
    Additional included accessories Eyepiece rack, Navigation knob, 1.25in. Eyepiece adapter
    Other features Full Go-To control
    Warranty One year

  2. #2
    jenniferchristine's Avatar
    jenniferchristine is offline Jedi Moderator
    Points: 76,152, Level: 100
    Level completed: 0%, Points required for next Level: 0
    Overall activity: 8.0%
    Achievements:
    200+ Posts Achievement!Ghost Achievement! Averaging 5+ posts a day!First 1000 Experience PointsGot three Friends20+ Friends Achievement!
    Join Date
    Oct 2010
    Location
    Ormeau SEQld Australia
    Posts
    11,249
    Points
    76,152
    Level
    100
    Thanks
    580
    Thanked 4,791x 3,198 Posts

    Default

    An astrograph by its very definition is made for taking pictures.
    A goto dob is not going to track as accurately so will not be so good for pics.

    The difference between 10" and 12" is not as big as you would think and the difference is going to be more about the wide field and speed - f3.9 against f4.9 both are fast and will have a similar FOV - 300x is a lot of magnification and is probably not going to be used much - 200X is more likely to be the normal max.

    Personally I'd go with the astrograph EVERY TIME - it's going to be good for many years.
    NEQ6 Pro Mount.
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    ACF 8" and
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    8" emc, Canon 450D (Rebel XSi) 18-55 and 75-300 lenses. Canon 70DW 18-135 USM and sigma 70-300. 4000 lens kit. Orion Starshoot Autoguider.
    Saxon 100 f9 Apo. Saxon20x80 Binoculars. Meade ext 125 Mak

    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    102 x F5 guide
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    /wide field scope. 10x10 shed with dome. Sky watcher sky adventurer mount.

  3. #3
    LesPhelps's Avatar
    LesPhelps is offline White Dwarf
    Points: 1,091, Level: 18
    Level completed: 91%, Points required for next Level: 9
    Overall activity: 0%
    Achievements:
    365 Days+ Registered Achievement!First 1000 Experience Points750 Days+ Registered Achievement!
    Join Date
    Jan 2011
    Location
    Madison Wisconsin
    Posts
    1
    Points
    1,091
    Level
    18
    Thanks
    0
    Thanked 0x 0 Posts

    Default

    It depends on whether you are going to take pictures or not. The dob will be easier to use if you aren't going to do astrophotography. Of the two, the astrograph is really your only choice if you are going to take pictures. I'd recommend a comma corrector with either one, something like the MPCC coma corrector would do.

    Astrophotography makes aperature less important. What you lack in diameter you can make up in exposure time. Plus, a decent ccd chip is much more light sensitive than the human eye.

    Of course, astrophotography carries a higher price tag that visual observation.

    CS.

  4. #4
    AlexMNet's Avatar
    AlexMNet is offline White Dwarf
    Points: 748, Level: 14
    Level completed: 96%, Points required for next Level: 2
    Overall activity: 0%
    Achievements:
    365 Days+ Registered Achievement!2 Posts Achievement20 Posts Achievement!
    Join Date
    Aug 2011
    Location
    California
    Posts
    14
    Points
    748
    Level
    14
    Thanks
    14
    Thanked 8x 7 Posts

    Default

    njmcgregor0909
    What telescope did you end up purchasing?

 

 

Similar Threads

  1. Orion XT12G GoTo Dob
    By jolasa in forum Dobsonian Telescopes Forum
    Replies: 14
    Last Post: 11-23-2010, 12:54 AM
  2. Orion SkyQuest XT8 vs. Orion AstroView 6 Equatorial Reflector
    By Trackspace in forum Reflector Telescope Forum
    Replies: 5
    Last Post: 11-19-2010, 12:48 AM
  3. Orion SkyQuest 12XTg GoTo Dobsonian telescope
    By rogerio.ribas.cd in forum Orion Telescopes Forum
    Replies: 11
    Last Post: 10-18-2010, 09:01 PM
  4. Orion SkyQuest XT12g Review
    By admin in forum Dobsonian Telescopes Forum
    Replies: 0
    Last Post: 07-13-2010, 09:26 AM
  5. orion skyquest XTG 10 inch goto verses skywatcher synscan 10 inch goto
    By misterfixall in forum Skywatcher Telescopes Forum
    Replies: 0
    Last Post: 05-18-2010, 12:52 AM

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Powered by vBulletin® Version 4.2.0
Powered by vBulletin®
All times are GMT. The time now is 07:44 AM.