Approve the Cookies
This website uses cookies to improve your user experience. By using this site, you agree to our use of cookies and our Privacy Policy.
OK
Index  •   • New posts  •   • RTAT  •   • 'Best of'  •   • Gallery  •   • Gear  •   • Reviews
Guest
New posts  •   • RTAT  •   • 'Best of'  •   • Gallery  •   • Gear  •   • Reviews
Register to forums    Log in

 
FORUMS Photography Talk by Genre Astronomy & Celestial Talk 
Thread started 14 Jan 2013 (Monday) 03:02
Search threadPrev/next
sponsored links
(this ad will go away when you log in as a registered member)

500mm on a motorized barn door tracker?

 
Paxonator
Senior Member
Avatar
520 posts
Gallery: 1 photo
Best ofs: 1
Likes: 6
Joined Jun 2010
Location: Sask, Canada
     
Jan 14, 2013 03:02 |  #1

I'm looking at the feasibility of putting my 500 on a barn door tracker. I have a gitzo 3541 tripod with a markins q-20 ball head which will be able to hold the weight. I'm just curious how hard it would be to fine tune the motor so it runs exactly at 1rpm?

Also does anyone have any recent tutorials on building a motorized one. There's plenty of non motorized tutorials. Here's the newest one I could find http://www.garyseronik​.com/?q=node/52 (external link)

I seem to remember someone on here using a motorized mount and getting good results. All help is greatly appreciated.

Thanks,

Travis


7D | 5DmII | 11-16 | 24-105 | 50 1.4 | 85 1.8 | 135 | 70-200 2.8 IS II | 100-400 | 500 f4 IS | 100 2.8 Macro | MP-E 65 | 580ex II | FB

  
  LOG IN TO REPLY
sponsored links
(this ad will go away when you log in as a registered member)
Nighthound
Cream of the Crop
Avatar
11,675 posts
Gallery: 226 photos
Best ofs: 24
Likes: 4523
Joined Aug 2007
     
Jan 14, 2013 08:36 |  #2

There's no reason it can't be done but the 500 is a lot of lens and with the camera is quite heavy for a barn door. I would approach the project with all heavy duty and rigid construction as a priority.


Steve
Canon Gear: 1D Mark IV | 1D Mark II | 5D | 20D | 500L IS (f/4) | 100-400L
SteveEllwoodPhotograph​y.com (external link)

  
  LOG IN TO REPLY
the ­ jimmy
Goldmember
Avatar
1,422 posts
Likes: 10
Joined Dec 2009
Location: west coast of Florida
     
Jan 14, 2013 11:50 |  #3

Paxonator wrote in post #15485806 (external link)
Also does anyone have any recent tutorials on building a motorized one. There's plenty of non motorized tutorials. Here's the newest one I could find http://www.garyseronik​.com/?q=node/52 (external link)

I seem to remember someone on here using a motorized mount and getting good results. All help is greatly appreciated.

Thanks,

Travis

Start HERE this is in the Astronomy fourm in the photo sharing section, the thread is "You Don't Need a Telescope" post 1244, and it continues on. I am also interested in building one of these, post back in this thread any progress you make, thanks




  
  LOG IN TO REPLY
Paxonator
THREAD ­ STARTER
Senior Member
Avatar
520 posts
Gallery: 1 photo
Best ofs: 1
Likes: 6
Joined Jun 2010
Location: Sask, Canada
     
Jan 14, 2013 15:50 |  #4

Thanks Steve and Jimmy. I may talk to the guys at work and see if they could machine some parts for me.

I was looking at the astrotrac but it's pretty expensive. I figured I could whip something up and try it out for much less. I would also learn a lot more during the process as well.

I guess the one thing I also don't have is the tilt head that sits under the tracker.


7D | 5DmII | 11-16 | 24-105 | 50 1.4 | 85 1.8 | 135 | 70-200 2.8 IS II | 100-400 | 500 f4 IS | 100 2.8 Macro | MP-E 65 | 580ex II | FB

  
  LOG IN TO REPLY
calypsob
Goldmember
Avatar
1,177 posts
Gallery: 3 photos
Likes: 89
Joined Jan 2012
Location: Roanoke Virginia
     
Jan 21, 2013 19:41 as a reply to  @ Paxonator's post |  #5

well a tilt head is no different than a pan head with an angle finder on it. You can get some pretty strong ones from smith victor and the 1980's velbon stratos heads are really cheap on ebay. You can get a motor drive for cheap on amazon also http://www.amazon.com …rds=telescope+m​otor+drive (external link)


Wes
-----------
flickr (external link)
Gear: Many gears Yes.

  
  LOG IN TO REPLY
Paxonator
THREAD ­ STARTER
Senior Member
Avatar
520 posts
Gallery: 1 photo
Best ofs: 1
Likes: 6
Joined Jun 2010
Location: Sask, Canada
     
Jan 22, 2013 19:30 |  #6

calypsob wrote in post #15517672 (external link)
well a tilt head is no different than a pan head with an angle finder on it. You can get some pretty strong ones from smith victor and the 1980's velbon stratos heads are really cheap on ebay. You can get a motor drive for cheap on amazon also http://www.amazon.com …rds=telescope+m​otor+drive (external link)

Thanks! So with that motor drive what does that all do? How does it attach to the threaded rod to spin it? I need to do more reading but if it does what I'm hoping it would make things easier. Especially since it's more readily available online.

*EDIT*

I just realized I could probably use my gimbal head as a wedge. I just need to mount an arca swiss plate to the barn door tracker and as far as I can tell it'll work.


7D | 5DmII | 11-16 | 24-105 | 50 1.4 | 85 1.8 | 135 | 70-200 2.8 IS II | 100-400 | 500 f4 IS | 100 2.8 Macro | MP-E 65 | 580ex II | FB

  
  LOG IN TO REPLY
calypsob
Goldmember
Avatar
1,177 posts
Gallery: 3 photos
Likes: 89
Joined Jan 2012
Location: Roanoke Virginia
     
Jan 23, 2013 18:34 |  #7

Paxonator wrote in post #15521991 (external link)
Thanks! So with that motor drive what does that all do? How does it attach to the threaded rod to spin it? I need to do more reading but if it does what I'm hoping it would make things easier. Especially since it's more readily available online.

*EDIT*

I just realized I could probably use my gimbal head as a wedge. I just need to mount an arca swiss plate to the barn door tracker and as far as I can tell it'll work.

Gimbal head would work to get the angle but does it have an angle scale on it? If not you can get a digital angle finder from harbor freight for $10. There are also some iphone apps that are angle finders but might not be as accurate. I have only recently started contemplating the use of an EQ mount motor to power a barndoor tracker because I am going to get rid of an old cheap eq mount but keep the motor. http://garyseronik.com​/?q=node/52 (external link) I assume the gary seronik method would work and a gear could be connected to the clockdrive motor instead of using the motor drive that Gary uses. The celestron clockdrive has a speed knob which has no presets so you need to center an object in the viewfinder and increase the speed from slowest to fastest until it stays in the center of the viewfinder. Honestly this would be pretty easy to do with a 500mm lens because the field rotation would cause stars to move out of view pretty quick, it would be a little more tedious with a wide angle because it would take probably around 10-15 minutes to tell if a star has moved away from the center of the frame. Finally remember that the moon, planets, and stars all need different speeds. The speed of tracking stars is called side real, the moon is called lunar, and planets are called planetary of course. If I remember correctly, the stars move the fastest.


Wes
-----------
flickr (external link)
Gear: Many gears Yes.

  
  LOG IN TO REPLY
Paxonator
THREAD ­ STARTER
Senior Member
Avatar
520 posts
Gallery: 1 photo
Best ofs: 1
Likes: 6
Joined Jun 2010
Location: Sask, Canada
     
Jan 25, 2013 07:35 |  #8

Thanks for all the info Wes. No I don't think there's an angle finder on the gimbal head. And I didn't know things moved at different speeds. This may be a harder venture than I thought.

I'll do more digging on how I can attach that celestron motor to the threaded rod. If i ever manage to get this thing to work I'll post some pictures.


7D | 5DmII | 11-16 | 24-105 | 50 1.4 | 85 1.8 | 135 | 70-200 2.8 IS II | 100-400 | 500 f4 IS | 100 2.8 Macro | MP-E 65 | 580ex II | FB

  
  LOG IN TO REPLY
calypsob
Goldmember
Avatar
1,177 posts
Gallery: 3 photos
Likes: 89
Joined Jan 2012
Location: Roanoke Virginia
     
Jan 27, 2013 01:02 as a reply to  @ Paxonator's post |  #9

Cool, I don't think it would be very difficult because the motor has a hollow tube with a tension screw for grabbing the ra and dec axis knobs so you could probably connect to a metal axle that feeds through a gear pretty easily.


Wes
-----------
flickr (external link)
Gear: Many gears Yes.

  
  LOG IN TO REPLY
KingRiver
Member
43 posts
Joined Jun 2011
Location: Sweden
     
Jan 30, 2013 12:14 |  #10

Hi all. Just wanted to stop by and tell you that I've started to build a motorized barn door tracker right now. Going to order a Celestron Logic Drive anyday as powersource and hopefully it will work. Camera attached on tripod head - the rest of the components will be made in aluminium and some 3D-modeled plastic parts (too lazy milling them out of alu. right now). The concept of it all comes from "www.garyseronik.com..​....." I think it will be finished in a week or two (too much at work now).


EOS 60D = Sigma EX 10-20/4,0-5,6 DC HSM = Sigma 17-70/2,8-4,0 DC OS HSM = EF 50 1.8 II = Helios 44-2 F/2

  
  LOG IN TO REPLY
the ­ jimmy
Goldmember
Avatar
1,422 posts
Likes: 10
Joined Dec 2009
Location: west coast of Florida
     
Jan 30, 2013 18:50 |  #11

KingRiver wrote in post #15552410 (external link)
Hi all. Just wanted to stop by and tell you that I've started to build a motorized barn door tracker right now. Going to order a Celestron Logic Drive anyday as powersource and hopefully it will work. Camera attached on tripod head - the rest of the components will be made in aluminium and some 3D-modeled plastic parts (too lazy milling them out of alu. right now). The concept of it all comes from "www.garyseronik.com..​....." I think it will be finished in a week or two (too much at work now).

Sounds good, looking forward to seeing photo's of the tracker, and images taken using it. If possible would be nice to see pics of various stages of the fabrication process.




  
  LOG IN TO REPLY
calypsob
Goldmember
Avatar
1,177 posts
Gallery: 3 photos
Likes: 89
Joined Jan 2012
Location: Roanoke Virginia
     
Jan 31, 2013 00:44 |  #12

KingRiver wrote in post #15552410 (external link)
Hi all. Just wanted to stop by and tell you that I've started to build a motorized barn door tracker right now. Going to order a Celestron Logic Drive anyday as powersource and hopefully it will work. Camera attached on tripod head - the rest of the components will be made in aluminium and some 3D-modeled plastic parts (too lazy milling them out of alu. right now). The concept of it all comes from "www.garyseronik.com..​....." I think it will be finished in a week or two (too much at work now).

Rad, keep us posted.. I actually realized today that surplusshed.com has a category for gears and they are cheap, like 40 cents cheap. Most of them are nylon but you may find one that can do the job.


Wes
-----------
flickr (external link)
Gear: Many gears Yes.

  
  LOG IN TO REPLY
KingRiver
Member
43 posts
Joined Jun 2011
Location: Sweden
     
Feb 09, 2013 09:15 |  #13

OK, don't have enough time at the moment but so far the alu-plates and gear with rod is finished. Just going to get the plates its final shape ..... still waiting for the drivemotor. The tripodhead just arrived yesterday. Ballhousing and gears printed in 3D printer, nice to print practically whatever models you need . Sorry if bad pictures but had my pocketcamera at that moment. Will post picture when all is complete and assembled.


HOSTED PHOTO
please log in to view hosted photos in full size.



HOSTED PHOTO
please log in to view hosted photos in full size.


EOS 60D = Sigma EX 10-20/4,0-5,6 DC HSM = Sigma 17-70/2,8-4,0 DC OS HSM = EF 50 1.8 II = Helios 44-2 F/2

  
  LOG IN TO REPLY
calypsob
Goldmember
Avatar
1,177 posts
Gallery: 3 photos
Likes: 89
Joined Jan 2012
Location: Roanoke Virginia
     
Feb 09, 2013 12:16 |  #14

WHAT ! thats really cool that you have access to a 3d printer and it looks like you have gotten a really good curve on that thread. I have actually been drawing a barn door tracker in autocad that uses one giant gear with a camera bracket on the front instead of the curved thread... This looks like it will work out nicely, it may work out in your favor to print some 3d hinges which can slide over a 1.25" tube so you can use the tube as a polar scope and the axle for the hinge at the same time. Very cool, please keep us posted. Also if you dont already have a 3 way geared head I found one that orion sells for cheap http://www.telescope.c​om …Motion-Adapter/p/7033.uts (external link) you may want to get an angle finder from harbor freight to get your latitude as well.


Wes
-----------
flickr (external link)
Gear: Many gears Yes.

  
  LOG IN TO REPLY
KingRiver
Member
43 posts
Joined Jun 2011
Location: Sweden
     
Feb 09, 2013 14:40 |  #15

Yeah, it's really nice to have access to a 3D-printer. Here at work we use Solidworks for CAD and 3D-models. Luckily we do have Solidworks engineers and printer in the department where I work. At the same time I do have access to the complete workshop also.....milling,turni​ng,welding etc.


EOS 60D = Sigma EX 10-20/4,0-5,6 DC HSM = Sigma 17-70/2,8-4,0 DC OS HSM = EF 50 1.8 II = Helios 44-2 F/2

  
  LOG IN TO REPLY
sponsored links
(this ad will go away when you log in as a registered member)

12,055 views & 0 likes for this thread
500mm on a motorized barn door tracker?
FORUMS Photography Talk by Genre Astronomy & Celestial Talk 
AAA
x 1600
y 1600

Jump to forum...   •  Rules   •  Index   •  New posts   •  RTAT   •  'Best of'   •  Gallery   •  Gear   •  Reviews   •  Member list   •  Polls   •  Image rules   •  Search   •  Password reset

Not a member yet?
Register to forums
Registered members may log in to forums and access all the features: full search, image upload, follow forums, own gear list and ratings, likes, more forums, private messaging, thread follow, notifications, own gallery, all settings, view hosted photos, own reviews, see more and do more... and all is free. Don't be a stranger - register now and start posting!


COOKIES DISCLAIMER: This website uses cookies to improve your user experience. By using this site, you agree to our use of cookies and to our privacy policy.
Privacy policy and cookie usage info.


POWERED BY AMASS forum software 2.1forum software
version 2.1 /
code and design
by Pekka Saarinen ©
for photography-on-the.net

Latest registered member is Kevinodw
1009 guests, 296 members online
Simultaneous users record so far is 15144, that happened on Nov 22, 2018

Photography-on-the.net Digital Photography Forums is the website for photographers and all who love great photos, camera and post processing techniques, gear talk, discussion and sharing. Professionals, hobbyists, newbies and those who don't even own a camera -- all are welcome regardless of skill, favourite brand, gear, gender or age. Registering and usage is free.