Results 1 to 8 of 8
Like Tree8Likes
  • 2 Post By Gfamily
  • 5 Post By Ozman13
  • 1 Post By Pauls72

Thread: Please forgive my ignorance; but, is there any way to “Frankenstein” go-to on my dob?

  1. #1
    Jennifromthadock's Avatar
    Jennifromthadock is offline White Dwarf
    Points: 210, Level: 4
    Level completed: 20%, Points required for next Level: 40
    Overall activity: 3.0%
    Achievements:
    2 Posts Achievement
    Join Date
    Jul 2018
    Location
    Langley, BC
    Posts
    4
    Points
    210
    Level
    4
    Thanks
    0
    Thanked 0x 0 Posts
    Downloads
    0
    Uploads
    0

    Question Please forgive my ignorance; but, is there any way to “Frankenstein” go-to on my dob?



    OK, so I’m pretty much giving up on the rebuild or restoration of the Meade ds-16. So now I’d like to know is there anyway to Frankenstein my Celestron nexstar go-to system onto, or vice versa, a 10” skywatcher collapsible dob. I love the go to for finding deep space objects and I’d really love to know if I could possibly take parts I already have and make them work with a skywatcher 10” collapsible dob....

    Furthermore, I know this is going to sound silly but I’m going to ask anyways: Can you use a collapsible dob in it’s collapsed length??

    Hope I’m not sounding really stupid but I’m just curious if any of these ideas I have in my head are viable…

    Thank you so much and advance!

  2. #2
    Gfamily's Avatar
    Gfamily is offline SUPER GIANT
    Points: 7,880, Level: 62
    Level completed: 10%, Points required for next Level: 270
    Overall activity: 5.0%
    Achievements:
    2 Posts Achievement365 Days+ Registered Achievement!First 1000 Experience Points750 Days+ Registered Achievement!20 Posts Achievement!
    Join Date
    Oct 2013
    Location
    Cheshire, United Kingdom
    Posts
    969
    Points
    7,880
    Level
    62
    Thanks
    39
    Thanked 356x 254 Posts
    Downloads
    0
    Uploads
    0

    Default Re: Please forgive my ignorance; but, is there any way to “Frankenstein” go-to on my

    I'd be interested to hear if anyone comes up with anything, but you could set them up beside each other, and use the go-to to show you which way to point the Dob, and getting a matched view in each finder.

    As for using the Dob in its collapsed state; the focal length of the primary is still the same, so the position of the prime focus will be about 12" beyond the end of the focuser - and you'll have lost a huge proportion of the light reflected by the mirror. So not practical I'm afraid.
    Ozypic and Jennifromthadock like this.
    All opinions you read here are given freely and are worth every cent.

    Meade LS8 and Skywatcher 127mm Mak for observing, Pentax K5 and Modded Canon 1000d for photographing
    Modified PS3 EYE for when we get planets
    Mid Cheshire Astro Society and the Delamere Forest Astronomers for company
    Recently added Star Adventurer for dSLR imaging.

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

  3. #3
    Ozman13's Avatar
    Ozman13 is online now HYPER GIANT
    Points: 25,140, Level: 100
    Level completed: 0%, Points required for next Level: 0
    Overall activity: 20.0%
    Achievements:
    2 Posts Achievement5 Threads Achievement!20 Posts Achievement!365 Days+ Registered Achievement!50 Posts Achievement!
    Join Date
    Jun 2013
    Location
    Hopkinsville Kentucky
    Posts
    7,234
    Points
    25,140
    Level
    100
    Thanks
    153
    Thanked 1,967x 1,757 Posts
    Downloads
    0
    Uploads
    0

    Default Re: Please forgive my ignorance; but, is there any way to “Frankenstein” go-to on my

    As Gfamily said, you will have to use the Dob at it's native focal length.

    I don't see anyway to use the goto other than to point in the general direction as it will not support the weight of the Dob.

    BUT!! You have a very simple and affordable option of turning your Dob into a "Push To" that will very quickly and accurately find any object, you just still have to do all the moving manually. With a digital level ($30) and an easy to make yourself setting circle, all you need is an astronomy app on a mobile device/smart phone to look up current alt/az co-ordinates of the object desired and you just push the scope to the co-ordinates and the object will be in a wide field EP most of the time. Aligning the setting circle is as easy as putting Polaris in the EP and setting the circle to zero.
    LX200 ACF 8"SCT, Apertura AD12, Celestron C6A SCT, SkyWatcher 120, ES 102CF Apo triplet, ES AR102, ST100, ST90, Apex 90mm Mak, ST80, ETX60, Oberwerk 25x100s, 15x70s, 8x56s, Kasai 2.3x40s, Celestron AVX, CG4, SLT, LCM, Obie HD Parallel Bino mount, Canon T5, Meade DSI2 Pro, Phillips cam, Explore Scientific 30mm, 24mm, 18mm, 14mm, 11mm, 8.8mm, 6.7mm 82 degree EPs, ES 24mm, 20mm, 16mm 68 degree EPs, Baader 9mm Ortho, Meade 5000 SWA EP set, many more various EPs, Baader Moon&SkyGlow, FringeKiller, SemiApo filters, Celestron UHC, Meade 4000 Nebular Filter, Kson OIII, DGM NPB and lots of astro stuff.

  4. #4
    Pauls72's Avatar
    Pauls72 is offline HYPER GIANT
    Points: 16,231, Level: 87
    Level completed: 95%, Points required for next Level: 19
    Overall activity: 12.0%
    Achievements:
    First 1000 Experience Points365 Days+ Registered Achievement!750 Days+ Registered Achievement!1000 Days+ Registered Achievement!3 Years + Achievement
    Join Date
    Jul 2009
    Location
    LaPorte, IN USA
    Posts
    1,535
    Points
    16,231
    Level
    87
    Thanks
    4
    Thanked 536x 414 Posts
    Downloads
    0
    Uploads
    0

    Default Re: Please forgive my ignorance; but, is there any way to “Frankenstein” go-to on my

    In In theory you could probably use your dob in the collapsed state. However for the amount of space collapsed, you would have to extend your eyepiece out with spacers to make up for it. So if it collapsed it moves the secondary down 24 inches, you would need 24 inches woth of spaces on your eyepiece to bring the scope into focus. The second issue is the light is narrowing down in a cone, when you collapse the scope the secondary will be moved down the cone light to a point where it is much wider than the secondary mirror and all that light will be lost.

    I don't think it would be practical to adapt your Celestron Nexstar GoTo system to a Skywatcher DOB.

    SkyWatcher does make a GoTo conversion kit. It is available from SW Canada, but it's on the expensive side.
    http://ca.skywatcher.com/product/pro...n-upgrade-kit/

    Meade used to make a DS motor drive kit that was pretty easy to adapt to all sorts of mounts. If you added the Meade 497 hand controller, you could make it a GoTo and could tell it to be EQ or Alt/Az and you could set the motor ratios. I think you would be hard pressed to find one of these kits.

    I would recommend you look at adding Digital Setting Circles and make it a push too. Argo Navis, Sky Commander and Nexus all make DSC kits. Should you ever want to add go to, you can add Servo-CAT to any of these.
    DSC's work great, a friend of mine has an Argo Navis and he moves it between his 16" DOB and 12" DOB and loves it.
    Jennifromthadock likes this.
    Mounts: EQ1, LXD55, Atlas EQ-G (one with Rowan belt mod and one without)
    Scopes: C11, 8" Reflector, 102mm MCT, ST80, W.O. FLT98, 6" RC, Lunt LS50THa/B400
    Cameras: Canon XTi, DSI-C, DSI, ST402, QHY8L, QHY183C, QHY163M
    Some of my Pic's http://www.astrobin.com/users/Pauls72/

  5. #5
    sxinias's Avatar
    sxinias is online now Super Moderator
    Points: 308,835, Level: 100
    Level completed: 0%, Points required for next Level: 0
    Overall activity: 10.0%
    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
    17,582
    Points
    308,835
    Level
    100
    Thanks
    4,476
    Thanked 10,051x 6,399 Posts
    Blog Entries
    4
    Downloads
    4
    Uploads
    1

    Default Re: Please forgive my ignorance; but, is there any way to “Frankenstein” go-to on my

    Several members have mentioned using a smart phone ap to find objects by attaching the phone/ tablet to their OTA and using their phone to guide them to objects. I've never sent it done but it sounds possible.
    SXINIAS

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


    iOptron ZEQ25 mount; SkyWatcher SynScan AZ GOTO Mount;
    Orion ST-80A 80mm Refractor (OTA); Meade LX200 203mm SCT (OTA);
    Meade DS2090AT 90mm Refractor; Meade 2045LX3 102mm SCT;
    Celestron NexStar 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 posts.

  6. #6
    Pauls72's Avatar
    Pauls72 is offline HYPER GIANT
    Points: 16,231, Level: 87
    Level completed: 95%, Points required for next Level: 19
    Overall activity: 12.0%
    Achievements:
    First 1000 Experience Points365 Days+ Registered Achievement!750 Days+ Registered Achievement!1000 Days+ Registered Achievement!3 Years + Achievement
    Join Date
    Jul 2009
    Location
    LaPorte, IN USA
    Posts
    1,535
    Points
    16,231
    Level
    87
    Thanks
    4
    Thanked 536x 414 Posts
    Downloads
    0
    Uploads
    0

    Default Re: Please forgive my ignorance; but, is there any way to “Frankenstein” go-to on my

    You can use a cell phone and/or manual setting circles, and these are OK for the bigger and brighter objects. But when you are on the hunt for faint and small objects the real detailed accuracy of DSC's can't be beat.
    Example: At the Nebraska Star Party using my friends 16 inch Light Bridge DOB with Arog Navis we where finding things like NGC4199, a magnitude 15.5 small smudge of a galaxy some 813 million light years from earth.
    Mounts: EQ1, LXD55, Atlas EQ-G (one with Rowan belt mod and one without)
    Scopes: C11, 8" Reflector, 102mm MCT, ST80, W.O. FLT98, 6" RC, Lunt LS50THa/B400
    Cameras: Canon XTi, DSI-C, DSI, ST402, QHY8L, QHY183C, QHY163M
    Some of my Pic's http://www.astrobin.com/users/Pauls72/

  7. #7
    RALibby's Avatar
    RALibby is offline Bright Giants
    Points: 4,174, Level: 43
    Level completed: 50%, Points required for next Level: 76
    Overall activity: 5.0%
    Achievements:
    2 Posts Achievement20 Posts Achievement!5 Threads Achievement!50 Posts Achievement!200+ Posts Achievement!
    Join Date
    May 2016
    Location
    Mars Hill, Maine
    Posts
    580
    Points
    4,174
    Level
    43
    Thanks
    141
    Thanked 99x 84 Posts
    Downloads
    9
    Uploads
    0

    Default Re: Please forgive my ignorance; but, is there any way to “Frankenstein” go-to on my

    I have done exactly what Oz recommended on my 12" dob. I have setting circle on base with a pointer and use a digital inclinometer for altitude on the ota. I use stellarium or skysafari on my tablet to give me the coordinates of the object I'm looking for then push the dob to the correct degree heading and tilt the ota to the correct altitude on the inclinometer.

    You have to level the base and align it with Polaris or other bright star so you have the setting circle and dob set to a known set of coordinates then you can find other objects. Polaris is the easiest because it is fixed in the sky so it makes setting the base and ota to known coordinates easier since your object is not moving in the sky while you you setting up.

    Hope this helps. I have some other threads that have photos of my setting circle and leveling dolly.
    Roger
    Scopes: Z12 F4.9 dob, Orion XT10g F4.7 dob, Tasco #7TE-5 60mm F16.7 w/Royal Astro lens on equatorial mount
    EPs: 30mm, ES 82* 18 mm, 14 mm, 11 mm and 8.8 mm, 9 mm Plossel,.965 ep 20mm, 12.5mm, 9mm, 6mm, 3x barlow
    Finder scope: 8x50 RACI, 6x30, Telrad
    Binocs: Nikon 8x35, Bushnell 10x42, Gordon 10x50

  8. #8
    Bataleon's Avatar
    Bataleon is offline Main Sequence
    Points: 918, Level: 17
    Level completed: 18%, Points required for next Level: 82
    Overall activity: 3.0%
    Achievements:
    2 Posts Achievement20 Posts Achievement!5 Threads Achievement!50 Posts Achievement!200+ Posts Achievement!
    Join Date
    Jul 2018
    Location
    Pennsylvania
    Posts
    180
    Points
    918
    Level
    17
    Thanks
    0
    Thanked 18x 18 Posts
    Downloads
    0
    Uploads
    0

    Default

    As far as the astronomy app question goes, I've used SkySafari 6 to hone in on a good number of objects with high success. It's quite detailed and you can generally triangulate what you're looking at by zooming in and matching the patterns in the app to what you see in the sky. That's how I found Neptune and a bunch of non-naked eye stars.

    Sent from my SM-G935T using Tapatalk

 

 

Similar Threads

  1. Astromania frankenstein camera adaptor
    By vertig0gitrev in forum Astronomy Beginners Forum
    Replies: 1
    Last Post: 03-10-2017, 09:46 PM
  2. Please forgive my rudeness!!
    By oranjeboom in forum Forum Welcomes Introductions
    Replies: 23
    Last Post: 07-23-2014, 01:21 AM
  3. Forgive my idiocy on this, but...
    By Tristantene in forum ATM DIY Telescope Making Forum
    Replies: 4
    Last Post: 08-05-2010, 01:47 AM
  4. Please Do Forgive
    By Dr. Yubiwan in forum General Astronomy Forum
    Replies: 15
    Last Post: 12-01-2004, 11:21 AM
  5. Please forgive my ex. girl friend.
    By Etherized in forum General Astronomy Forum
    Replies: 0
    Last Post: 10-05-2004, 01:18 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 07:41 AM.