Page 1 of 2 12 LastLast
Results 1 to 10 of 12
  1. #1
    Darto's Avatar
    Darto is offline White Dwarf
    Points: 6,882, Level: 57
    Level completed: 66%, Points required for next Level: 68
    Overall activity: 0%
    Achievements:
    First 1000 Experience Points365 Days+ Registered Achievement!750 Days+ Registered Achievement!2 Posts Achievement1000 Days+ Registered Achievement!
    Join Date
    Mar 2010
    Location
    California
    Posts
    38
    Points
    6,882
    Level
    57
    Thanks
    5
    Thanked 1 Time in 1 Post

    Default Dobsonian mount for refractors.



    Stellervue yahoo group starting to talk about the new SV Dobsonian mount for small refractors or Newtonians.

    Something different, anyways!

  2. #2
    jrkirkham's Avatar
    jrkirkham is offline HYPER GIANT
    Points: 34,437, Level: 100
    Level completed: 0%, Points required for next Level: 0
    Overall activity: 0%
    Achievements:
    200+ Posts Achievement!First 1000 Experience Points365 Days+ Registered Achievement!Visitor Messenger Achievement!Got three Friends
    Join Date
    Oct 2009
    Location
    Illinois, USA
    Posts
    2,793
    Points
    34,437
    Level
    100
    Thanks
    1,042
    Thanked 1,527x 887 Posts

    Default

    I think I am confused as to the definition of "Dobsonian". I always thought the idea of the Dobsonian is to pack the largest aperture into the simpliest, cheapest mount so it is accessible to the common person. I thought the first dobs were even hand made from inexpensive materials. This way of describing "Dobsonian" virtually excludes intentionally small apertures, expensive styles of scopes (such as refractors, cats, etc.), electronics, and upper end models of scopes. Now we have all sorts of scopes on dobsonian mounts. We have extremely expensive scopes on dobosinian mounts, complete with electronics, gear drives, etc. Am I wrong? Does dobsonian simply refer to any alt/az mount without a tripod? I think I must be wrong about what makes a dob a dob? With the increase of electronics I was beginning to think the true dob was beginning to lose favor, but if dob refers to alt/az mounts without tripods, then I think dobs will be among the upper end scopes of the future.
    Rob
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.


    Current Projects: nothing organized, just preparing for retirement in a few years
    Main Scopes: Orion XT10, Dob / ES ED80T / Orion 90mm Mak-Cass / 50 mm Galileoscope refractor / Celestron 8" SCT / Orion Sirius Mount / Various cameras and lenses

  3. #3
    sxinias's Avatar
    sxinias is online now Super Moderator
    Points: 323,522, Level: 100
    Level completed: 0%, Points required for next Level: 0
    Overall activity: 31.0%
    Achievements:
    Got three Friends20+ Friends Achievement!First 1000 Experience Points5+ Referrals Achievement!100+ Threads Achievement!
    Awards:
    Attachments Award
    Join Date
    Nov 2008
    Location
    Marathon Greece summer Tampa Florida winter
    Posts
    17,800
    Points
    323,522
    Level
    100
    Thanks
    4,582
    Thanked 10,192x 6,475 Posts
    Blog Entries
    4

    Default

    The DOB has gone a long way from the sidewalk astronomer ... home made mirrors made from port hole glass, vinyl records for azimuth bearings, concrete forms for scope tubing, etc. None of the store bought DOBs today match this. I guess the question is where to draw the line. For me, I'm in your camp. A DOB is a classical Newtonian on a very simple box azimuth mount with no electronics but..... who am I to say?
    SXINIAS

    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.



    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    ZEQ25 mount;
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    SynScan AZ
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    Mount;

    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    ST-80A 80mm Refractor (OTA); Meade
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    203mm SCT (OTA);
    Meade DS2090AT 90mm Refractor; Meade 2045LX3 102mm SCT;

    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    4 SE 102mm MAK; Celestron Advanced Series C6S (XLT) 150mm SCT
    with an iOptron GOTO Drive

    My Photos:
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.

  4. #4
    WWPierre's Avatar
    WWPierre is offline HYPER GIANT
    Points: 64,445, Level: 100
    Level completed: 0%, Points required for next Level: 0
    Overall activity: 0%
    Achievements:
    10 Days registered3 Years + Achievement400+ Posts AchievementGhost Achievement! Averaging 5+ posts a day!1000 Days+ Registered Achievement!
    Join Date
    Jun 2009
    Location
    Squamish B.C.
    Posts
    6,948
    Points
    64,445
    Level
    100
    Thanks
    1,095
    Thanked 2,953x 1,808 Posts

    Default

    Are they talking about this?

    M2 Alt Azimuth Mount - Mounts & Tripods by Stellarvue

    Hardly a dob.
    Meade 16" LightBridge; Celestron G-8N Bird-Jones/motorized EQ5;
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    127 Mak/go-to EQ5; Burgess 127f8 refractor; Sky-Watcher 5" F/5 collapsible dob; 90mm Mak/motorized EQ2; Royal Astro 76/910-GEM; Meade 60x700 refractor/alt/az; Zhumell 25x100 Coin Ops; GalilleoScope. Celestron 8mm-24mm zoom; lots of fixed EPs,some good, some..not so much. A small collection of surveying instruments; a forest of tripods; Canon Rebel Xti. Confirmed gadget junkie; Custodian of the Magnetic North Pole (Send $1.00 to Pierre each time you use a compass.)
    49-41-37.03N 123-09-29.61W Calculated magnetic declination: 17° 39' East

    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.


    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.


    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.

    We have been broadcasting our presence to the Universe for 100 years now. If there is a detachment of Galactic Pest Control within 100 light years, they are already on the way.

  5. #5
    Bob327's Avatar
    Bob327 is offline HYPER GIANT
    Points: 41,366, Level: 100
    Level completed: 0%, Points required for next Level: 0
    Overall activity: 0%
    Achievements:
    10 Days registered200+ Posts Achievement!First 1000 Experience PointsGot three Friends365 Days+ Registered Achievement!
    Join Date
    Sep 2009
    Location
    Frederick Maryland
    Posts
    9,247
    Points
    41,366
    Level
    100
    Thanks
    19
    Thanked 4,039x 3,068 Posts

    Default

    Lets think about this.... A dob mount would put the eyepiece kind of low to the ground.... a 3 foot tall rocker box may be useful for terrestrial viewing BUT unless you have a fox hole to stand in using a dob mounted refractor is going to be difficult...

    Bob G
    CPC1100 housed in a slotted domed observatory (Exploradome) 4 and 5 inch refractors for use from the lawn, a 8" Sct (NS 8i) for star parties...
    I Hate the winter so I use heated Motorcycle clothing to stay warm while observing in winter
    Retired, also have 2 other hobbies
    1. tinker with older Corvettes (6 in garage)
    2. make a heck of a lot of sawdust in my wood shop.

  6. #6
    pcwizard2600's Avatar
    pcwizard2600 is offline Main Sequence
    Points: 8,068, Level: 62
    Level completed: 73%, Points required for next Level: 82
    Overall activity: 0%
    Join Date
    Feb 2009
    Location
    Central Vermont
    Posts
    91
    Points
    8,068
    Level
    62
    Thanks
    29
    Thanked 32x 23 Posts

    Default

    "Dob" or Dobsonian strictly refers to the mount/base. Most typically it is a newtonian style scope on a "dob" style base, which is usually a "rocker box" style. This combined designs has always been known for it's simple design, easy and cheap to build. A number of scope makers will offer the same optical tube in either a dob or EQ mount. I have seen a few home built dob bases for a refractor, but they tend to be real tall due to the low eyepiece problem that Bob mentions. In my opinion, refractors belong on a tripoded mount, newtonians (reflectors) belong on a dob base.

    Pat
    Criterion (RV-6) 6" reflector, Celestron 10" reflector (dobsonian), Meade 2080 (8" SCT), Orion 120 mm refractor, Orion ST-80 refractor, many binos, Meade 12x50, Barska 15x70, Visioner 20x80, Celestron 25x100

  7. #7
    Djarum's Avatar
    Djarum is offline Main Sequence
    Points: 7,490, Level: 60
    Level completed: 70%, Points required for next Level: 60
    Overall activity: 0%
    Achievements:
    10 Days registered365 Days+ Registered Achievement!750 Days+ Registered Achievement!First 1000 Experience Points1000 Days+ Registered Achievement!
    Join Date
    Mar 2009
    Posts
    90
    Points
    7,490
    Level
    60
    Thanks
    0
    Thanked 31x 22 Posts

    Default

    I've actually seen small refractors on a tabletop dob mount that stellarvue sells.

  8. #8
    Leo's Avatar
    Leo
    Leo is offline SUPER GIANT
    Points: 11,929, Level: 75
    Level completed: 60%, Points required for next Level: 121
    Overall activity: 0%
    Achievements:
    Got three Friends20+ Friends Achievement!200+ Posts Achievement!First 1000 Experience PointsVisitor Messenger Achievement!
    Join Date
    Apr 2010
    Location
    Calgary, AB, Canada
    Posts
    680
    Points
    11,929
    Level
    75
    Thanks
    559
    Thanked 178x 127 Posts

    Default

    Enrico Bandolin
    <img src="http://cleardarksky.com/c/Calgarycs0.gif?1">
    Infected with
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    and accessories buying spree disease.

    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.

    <a href="http://enricobandolin.com/">My Website</a>

    __________________

  9. #9
    stevew's Avatar
    stevew is offline White Dwarf
    Points: 2,300, Level: 30
    Level completed: 40%, Points required for next Level: 150
    Overall activity: 0%
    Achievements:
    365 Days+ Registered Achievement!750 Days+ Registered Achievement!First 1000 Experience Points1000 Days+ Registered Achievement!2 Posts Achievement
    Join Date
    May 2010
    Location
    Vancouver
    Posts
    12
    Points
    2,300
    Level
    30
    Thanks
    0
    Thanked 2x 2 Posts

    Default

    Quote Originally Posted by Darto View Post
    Stellervue yahoo group starting to talk about the new SV Dobsonian mount for small refractors or Newtonians.

    Something different, anyways!
    A few years ago when I could not afford a mount for a D&G I made an Alt Az mount for it.

    Steve
    Attached Images Attached Images

  10. #10
    techno's Avatar
    techno is offline White Dwarf
    Points: 1,573, Level: 23
    Level completed: 73%, Points required for next Level: 27
    Overall activity: 0%
    Achievements:
    First 1000 Experience Points365 Days+ Registered Achievement!750 Days+ Registered Achievement!2 Posts Achievement1000 Days+ Registered Achievement!
    Join Date
    Jul 2010
    Location
    somerset UK
    Posts
    14
    Points
    1,573
    Level
    23
    Thanks
    4
    Thanked 5x 5 Posts

    Default

    A Dobsonian for a refractor? Surely not. More like an Altazimuth mount. You really would need a refractor "dob" to be mounted on a VERY sturdy table or on top of a tall pillar/tripod which is then really a "standard" altaz?

    I would not like to use a refractor on the ground with a traditional Dob mount. Ouch, that really would hurt, especially at my age!!!!
    Fullerscope 10" f5 on MK4 mount, Fullerscopes 8 3/4" f7 on MK3 mount, Planetary 6" f8 Newtonian (1/12wave optics), TMB 130 f9 APO, Vixen/Antares 4" f/15 achro, H.Wildey 4" f/11 achro, PST.

 

 
Page 1 of 2 12 LastLast

Similar Threads

  1. equatorial mount for dobsonian
    By heman90210 in forum Astronomy Beginners Forum
    Replies: 4
    Last Post: 12-07-2010, 04:50 AM
  2. dobsonian mount questions
    By iamsneaky13 in forum Dobsonian Telescopes Forum
    Replies: 6
    Last Post: 12-05-2009, 11:38 PM
  3. Dobsonian mount for an 8" f9
    By digirak in forum Telescope Mounts Forum
    Replies: 8
    Last Post: 07-02-2009, 02:38 PM
  4. Purchasing a dobsonian mount (on its own)
    By Gareth Williams in forum UK Astronomy Forum
    Replies: 5
    Last Post: 09-13-2006, 06:23 PM
  5. Dobsonian mount
    By Mark Miller in forum Amateur Astronomy Forum
    Replies: 3
    Last Post: 11-14-2003, 01:22 PM

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 09:48 PM.