Results 1 to 8 of 8
Like Tree7Likes
  • 2 Post By Gabby76
  • 1 Post By Piet Le Roux
  • 3 Post By not_Fritz_Argelander
  • 1 Post By Piet Le Roux

Thread: Laser Collimator Question

  1. #1
    Greg6498's Avatar
    Greg6498 is offline Gold Supporter
    Points: 1,289, Level: 20
    Level completed: 89%, Points required for next Level: 11
    Overall activity: 4.0%
    Achievements:
    2 Posts Achievement20 Posts Achievement!5 Threads Achievement!50 Posts Achievement!Got three Friends
    Join Date
    Nov 2018
    Location
    Lexington, VA
    Posts
    64
    Points
    1,289
    Level
    20
    Thanks
    98
    Thanked 6x 5 Posts

    Talking Laser Collimator Question



    I am looking for a good, easy to use laser Collimator for my Skywatcher Dobsonian. I’m not sure if my Skywatcher has any kind of “collimating target” on the mirrors. Any suggestions?

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

    Skywatcher 8” Collapsible Dobsonian with an Explore Scientific 8x50 Polar Illuminated Erect Image Finder Scope Skywatcher Evostar Pro 80mm RefractorStellarvue 9x50 Erect Image Finder ScopeMead LX70 EQ5 Mount
    Baader Morpheus 12.5 mm eyepiece ​Explore Scientific 6.7 mm eyepiece Explore Scientific 18 mm eyepiece

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

  2. #2
    Gabby76's Avatar
    Gabby76 is offline Super Moderator
    Points: 83,561, Level: 100
    Level completed: 0%, Points required for next Level: 0
    Overall activity: 99.8%
    Achievements:
    2 Posts Achievement20 Posts Achievement!Gallery Achievement!Album Achievement!50 Posts Achievement!
    Awards:
    Activity & Post & Thread Master
    Join Date
    Jan 2016
    Location
    Slovakia
    Posts
    19,410
    Points
    83,561
    Level
    100
    Thanks
    3,706
    Thanked 6,017x 5,054 Posts
    Blog Entries
    4

    Default Re: Laser Collimator Question

    If the primary mirror does not have a center dot or doughnut on it you can place one yourself. Easy to do.
    You will still need the collimation cap to check that the secondary is aligned under the focuser though.
    Refractors: Antares 105 f/15, Celestron 150 f/8, Stellarvue NHNG 80 f/6.9, TAL 100RS f/10, TS 102 f/11, UR 70 f/10, Vixen SD115s f/7.7
    Mounts: Celestron SLT w/ pier mod & EQ-3 tripod, Celestron hypertuned CG-5 w/ tracking motor & Argo Navis, Manfrotto 028B w/ Stellarvue M2C, Manfrotto 055PRO w/ 128RC, TAL-1 HD EQ, Vixen SXP w/ HAL-130 SXG & half pier
    Diagonals: 2" Astro-Physics MaxBright, 2" Zeiss/ Baader prism, 2" Baader Herschel Wedge (Photo Version), 2"
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    Amici prism, 2" Stellarvue Dielectric, 2" TeleVue Everbrite
    Eyepieces: A-Z

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

    The weakest link in the optical chain is the large nut located directly behind the
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    / camera. - Gabrielle

    Ya gotta keep this Apo/
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    thing in some balance of perspective. Apos are awesome, but long focus Achros aren't that far behind them - Siriusandthepup (CN)

    Refractors kick arse precisely because they don't hide behind excuses. That is, they have no obstructions to hide behind. - Jon Isaacs (CN)

  3. The Following User Says Thank You to Gabby76 For This Useful Post:

    Greg6498 (12-14-2018)

  4. #3
    Piet Le Roux's Avatar
    Piet Le Roux is offline Bright Giants
    Points: 2,807, Level: 34
    Level completed: 38%, Points required for next Level: 93
    Overall activity: 0%
    Achievements:
    2 Posts Achievement20 Posts Achievement!50 Posts Achievement!5 Threads Achievement!365 Days+ Registered Achievement!
    Join Date
    Nov 2017
    Location
    Bloemfontein South Africa
    Posts
    300
    Points
    2,807
    Level
    34
    Thanks
    12
    Thanked 48x 46 Posts

    Default Re: Laser Collimator Question

    If you have a 2" focuser I can suggest the Kendrick Astro (if they still make them) Mine came with my Dobson and because it's a truss design I have to check the collimation every time after assembly and mostly in the dark(and mine has a 1.7 meter focal length) so a Cheshire is not a option. With the laser I look down the tube and get the laser on the center donut with the 3 secondary mirror spring loaded screws then I adjust the 3 primary mirror knobs looking up at the laser till the return dot is in the laser hole : very easy and takes me less than 3 minutes.
    One year of astronomy and totally hooked!
    Equipment : 15" Obsession F4.5 Classic, Tele Vue 1.25" 7&13mm Nagler, Tele Vue 2" 27mm Panoptic, Tele Vue Big
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    , Tele Vue Paracorr II : 8" Meade LX90ACF with Meade 2.0" Enhanced Diagonal, Baarder Hyperion MK III 24-8mm zoom and 2" 40mm Astromania Kellner

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

  5. #4
    Piet Le Roux's Avatar
    Piet Le Roux is offline Bright Giants
    Points: 2,807, Level: 34
    Level completed: 38%, Points required for next Level: 93
    Overall activity: 0%
    Achievements:
    2 Posts Achievement20 Posts Achievement!50 Posts Achievement!5 Threads Achievement!365 Days+ Registered Achievement!
    Join Date
    Nov 2017
    Location
    Bloemfontein South Africa
    Posts
    300
    Points
    2,807
    Level
    34
    Thanks
    12
    Thanked 48x 46 Posts

    Default Re: Laser Collimator Question

    this one looks like it could do the job...
    https://www.hotechusa.com/2-SCA-Cros...r-p/sca-2c.htm
    Larry Bradt likes this.
    One year of astronomy and totally hooked!
    Equipment : 15" Obsession F4.5 Classic, Tele Vue 1.25" 7&13mm Nagler, Tele Vue 2" 27mm Panoptic, Tele Vue Big
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    , Tele Vue Paracorr II : 8" Meade LX90ACF with Meade 2.0" Enhanced Diagonal, Baarder Hyperion MK III 24-8mm zoom and 2" 40mm Astromania Kellner

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

  6. #5
    not_Fritz_Argelander's Avatar
    not_Fritz_Argelander is offline HYPER GIANT
    Points: 182,949, Level: 100
    Level completed: 0%, Points required for next Level: 0
    Overall activity: 36.0%
    Achievements:
    365 Days+ Registered Achievement!2 Posts Achievement20 Posts Achievement!750 Days+ Registered Achievement!First 1000 Experience Points
    Awards:
    Thread Award
    Join Date
    Jul 2011
    Location
    US
    Posts
    22,040
    Points
    182,949
    Level
    100
    Thanks
    7,254
    Thanked 46,396x 14,954 Posts
    Blog Entries
    59

    Default Re: Laser Collimator Question

    But first make sure the laser collimator is itself collimated! I made a collimator test stand out of a baseboard and two uprights with a V notch for the laser. Rolling the laser in the Vs, the point where the laser hits the wall should not wander in a circle. Most collimators have adjustment screws so you can straighten them out if they've gone out of whack in shipping.

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

    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    ST80 (mods for white light solar), SV ED80 f7 Newtonians: Z12 f5 Catadioptrics: VMC110L, Intes MK66 EPs: KK Fujiyama Orthoscopics, 2x Vixen NPLs (40-6mm) and BCOs, Baader Mark IV zooms, TV Panoptics, Delos, Plossl 32-8mm. Mixed brand Masuyama/Astroplans Binocular Nikon Aculon 10x50, Celestron 15x70, Baader Maxbright. Mounts: Star Seeker III, Vixen Porta II, Celestron CG5, Orion
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    EQG

  7. The Following User Says Thank You to not_Fritz_Argelander For This Useful Post:

    j.gardavsky (12-15-2018)

  8. #6
    Piet Le Roux's Avatar
    Piet Le Roux is offline Bright Giants
    Points: 2,807, Level: 34
    Level completed: 38%, Points required for next Level: 93
    Overall activity: 0%
    Achievements:
    2 Posts Achievement20 Posts Achievement!50 Posts Achievement!5 Threads Achievement!365 Days+ Registered Achievement!
    Join Date
    Nov 2017
    Location
    Bloemfontein South Africa
    Posts
    300
    Points
    2,807
    Level
    34
    Thanks
    12
    Thanked 48x 46 Posts

    Default Re: Laser Collimator Question

    Quote Originally Posted by not_Fritz_Argelander View Post
    But first make sure the laser collimator is itself collimated! I made a collimator test stand out of a baseboard and two uprights with a V notch for the laser. Rolling the laser in the Vs, the point where the laser hits the wall should not wander in a circle. Most collimators have adjustment screws so you can straighten them out if they've gone out of whack in shipping.
    For me a easy and practical way to collimate my laser is to lay it om my workbench vise adjusting the gap til it rotate easely. On the wall where the laser beam lands I first stick black adhesive tape and then surround the dot with a white ring-reinforcement donut : this makes it easy to see at a distance because you can immediately see when the beam "climbs out of the black hole".

    Here is a manual for adjusting the collimator : http://www.tilburyhillobservatory.co...fcollimate.pdf
    Last edited by Piet Le Roux; 12-16-2018 at 04:20 AM.
    One year of astronomy and totally hooked!
    Equipment : 15" Obsession F4.5 Classic, Tele Vue 1.25" 7&13mm Nagler, Tele Vue 2" 27mm Panoptic, Tele Vue Big
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    , Tele Vue Paracorr II : 8" Meade LX90ACF with Meade 2.0" Enhanced Diagonal, Baarder Hyperion MK III 24-8mm zoom and 2" 40mm Astromania Kellner

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

  9. #7
    Larry Bradt's Avatar
    Larry Bradt is offline Bright Giants
    Points: 1,446, Level: 22
    Level completed: 46%, Points required for next Level: 54
    Overall activity: 0%
    Achievements:
    2 Posts Achievement20 Posts Achievement!50 Posts Achievement!5 Threads Achievement!200+ Posts Achievement!
    Join Date
    Aug 2018
    Location
    PA
    Posts
    211
    Points
    1,446
    Level
    22
    Thanks
    2
    Thanked 7x 7 Posts

    Default Re: Laser Collimator Question

    Quote Originally Posted by Piet Le Roux View Post
    this one looks like it could do the job...
    https://www.hotechusa.com/2-SCA-Cros...r-p/sca-2c.htm
    Thanks for the suggestion. I just ordered one.
    Scope: SkyWatcher 10" GoTo Dob
    EPs: 2" GSO 30mm 2" Explore Scientific 18mm 82*, 2" GSO 2x barlow, 1.25" 25mm Plossl, 1.25" 10mm Plossl, 1.25" Explore Scientific 6.7mm 82*,1.25" Explore Scientific 8.8mm, 20mm illuminated reticle

  10. #8
    Piet Le Roux's Avatar
    Piet Le Roux is offline Bright Giants
    Points: 2,807, Level: 34
    Level completed: 38%, Points required for next Level: 93
    Overall activity: 0%
    Achievements:
    2 Posts Achievement20 Posts Achievement!50 Posts Achievement!5 Threads Achievement!365 Days+ Registered Achievement!
    Join Date
    Nov 2017
    Location
    Bloemfontein South Africa
    Posts
    300
    Points
    2,807
    Level
    34
    Thanks
    12
    Thanked 48x 46 Posts

    Default Re: Laser Collimator Question

    Quote Originally Posted by Larry Bradt View Post
    Thanks for the suggestion. I just ordered one.
    I have read some negative comments about laser collimators but if you checked its collimation it's the best and fastest way to collimate a Dobson. I think one reason for bad reviews is that any focuser slop or eyepiece holder play is amplified by the laser where with a Chesshire you won't even notice it, especially with a focal length of more than 1.5 meters. My Taurus 15" primary mirror has a "X" engraved on its center and this is superimposed on the return beam : so if I got the return beam in the center of the collimator and I can see the "X" I know I have perfect collimation.
    One year of astronomy and totally hooked!
    Equipment : 15" Obsession F4.5 Classic, Tele Vue 1.25" 7&13mm Nagler, Tele Vue 2" 27mm Panoptic, Tele Vue Big
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    , Tele Vue Paracorr II : 8" Meade LX90ACF with Meade 2.0" Enhanced Diagonal, Baarder Hyperion MK III 24-8mm zoom and 2" 40mm Astromania Kellner

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

 

 

Similar Threads

  1. quick question about laser collimator
    By DTC1999 in forum Astronomy Beginners Forum
    Replies: 11
    Last Post: 10-01-2016, 12:34 AM
  2. laser collimator for dobsonian question
    By Callsignviper12 in forum Astronomy Beginners Forum
    Replies: 17
    Last Post: 11-05-2014, 04:43 PM
  3. Laser Collimator size question (which to buy?)
    By haveblue in forum Astronomy Beginners Forum
    Replies: 13
    Last Post: 10-25-2012, 03:52 AM
  4. Replies: 6
    Last Post: 08-15-2012, 07:09 AM
  5. Apertura/Zhumell owners laser collimator question
    By Ashkid in forum Dobsonian Telescopes Forum
    Replies: 5
    Last Post: 08-06-2012, 06:04 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 11:41 AM.