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Go Back   IceInSpace > Equipment > ATM and DIY Projects

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  #61  
Old 03-11-2018, 01:48 PM
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LewisM
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Well, that was worth all my blood, sweat and tears (more tears than anything )

Epic is a very apt adjective for this restoration. From Freddy Kruger to Belle of the Ball.
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  #62  
Old 03-11-2018, 03:05 PM
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That last re-aligning pic looks like you're all set to touch down at Clavius Base
(tragic 2001 Space Odyssey reference - skip to 2:45 )


https://www.youtube.com/watch?v=RtDS2sI0N50
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  #63  
Old 04-11-2018, 04:57 PM
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Quote:
Originally Posted by Wilso View Post
Looks fantastic Marc,

Keeping the tag in original condition is a good idea also!
I kind of like messing with my Astro gear as much as looking through them.
Very rewarding when completed.

Thanks. That's the only ugly bit that reminds me where it comes from.
Quote:
Originally Posted by LewisM View Post
Well, that was worth all my blood, sweat and tears (more tears than anything )

Epic is a very apt adjective for this restoration. From Freddy Kruger to Belle of the Ball.
I like frankenstein better, Freddy Kruger scared the sh!t out of me when it came out.
Quote:
Originally Posted by RobF View Post
That last re-aligning pic looks like you're all set to touch down at Clavius Base
(tragic 2001 Space Odyssey reference - skip to 2:45 )


https://www.youtube.com/watch?v=RtDS2sI0N50
yeah I remember that scene.

Still watching paint dry for now. Nothing new yet. Might do a star test tonight with an articicial star to check collimation but the tube is still very tender to handle which is a real pita. I have to be super careful. I've learnt a lot about touch ups though and paint resto, polishing, etc... so I kept busy fixing my car bonnet this weekend and bought an orbital polisher. Holding this thing is like riding a hula hoop.
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  #64  
Old 04-11-2018, 06:49 PM
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All set up to check collimation tonight. Waiting for dark.
Artificial star across the reserve is ~30m I'd say direct line of sight from the scope on the table through the garage.
Posting a couple of videos soon taken through the scope with my SONY NEX-5.

Here's the video during twilight of the artificial star at the cassegrain focus.

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Last edited by multiweb; 04-11-2018 at 07:05 PM.
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  #65  
Old 04-11-2018, 08:12 PM
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Learnt a few things tonight. My artificial star is just not bright enough to be of any use with the CN-212. 8 ish " at f/12+ doesn't cut it. Even visually with a 4mm eyepiece it's pretty dim once defocused. The NEX-5 at 12800 ISO 5s exposures shows the diffraction rings but I focus and shoot in the dark. Nothing is bright enough for a live view focus. Will have to try with a webcam and the laptop next time. Here's a serie of pics in and out of focus. Collimation is a little out but not by much so as Rob said my 2001 moon landing was pretty close.

Here's a GIF sequence shooting in the dark. Will do a better video with my ZWO when I get a chance and tweak collimation.
Also added what I think is the closest to focus in the few frames I got.
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Last edited by multiweb; 06-11-2018 at 02:18 PM. Reason: added focus pic
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  #66  
Old 06-11-2018, 10:27 AM
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Here's a video done last night with an ASI 120MM.
I will need to mount the scope to do further tweaking as it is cumbersome to collimate and shift the OTA back on the table to recenter the star.

PS: I measured accurately tonight. The distance from the scope aperture to the star was 46m and the diameter of the smallest inner dark disc where the star sits in the video is 4.7mm across.



and a focus sequence with Bahtinov mask [7.5MB].

Last edited by multiweb; 06-11-2018 at 05:46 PM.
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  #67  
Old 06-11-2018, 02:48 PM
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Marc,
are you going to set-up both the Newt and Cass arrangements??
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  #68  
Old 06-11-2018, 02:59 PM
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Quote:
Originally Posted by Merlin66 View Post
Marc,
are you going to set-up both the Newt and Cass arrangements??
I'm trying to get the cassegrain right first, spider centering, primary tilt etc... I'm still waiting on the TAK collimation tools and accessories to do the newt side of things. The mirror has a hole in the middle so you can't use a cheshire or a laser or even the catseye kit, so I'll do that later. There's a step by step procedure in the manual. I also saw a few posts on CN using a howie glatter.

Last edited by multiweb; 06-11-2018 at 03:18 PM.
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  #69  
Old 07-11-2018, 05:54 PM
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It is Aliiive!....
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  #70  
Old 07-11-2018, 07:38 PM
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Awesome stuff Marc and Lewis.

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  #71  
Old 07-11-2018, 08:57 PM
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Quote:
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It is Aliiive!....
whats that red bit - did you cut yourself assembling it
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  #72  
Old 07-11-2018, 09:18 PM
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Quote:
Originally Posted by h0ughy View Post
whats that red bit - did you cut yourself assembling it
Some of Lewis blood and sweat.

Keen for tonight. Not ideal conditions but hopefully can have a look at some real stuff for a change.
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Last edited by multiweb; 08-11-2018 at 07:22 AM.
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  #73  
Old 08-11-2018, 08:36 AM
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I think you offended Lewis with that moonlite
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  #74  
Old 08-11-2018, 08:42 AM
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Quote:
Originally Posted by Lognic04 View Post
I think you offended Lewis with that moonlite
I need a focuser to image at the back. The moonlite is motorised. Otherwise I'd have to drill the back for a bracket and change the primary focuser to a micro focuser. If I drilled the back Lewis would give me a call for sure.
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  #75  
Old 08-11-2018, 09:34 AM
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hehe. I think i have to drill my focuser, only way i can mount a stepper properly! Lewis is definitely gonna kill me
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  #76  
Old 08-11-2018, 10:46 AM
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I gave up on saving that MT160 a long time ago

Plenty ways to mount the stepper without drilling. Use the flange screws already there, bend the bracket at right angles. think laterally.
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  #77  
Old 08-11-2018, 12:40 PM
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Flange screw or screw(s)?
I think i probably might have better luck with manual focusing for the minute anyways, with this focuser...
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  #78  
Old 08-11-2018, 03:43 PM
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My TAK collimation and adapters are posted. Should get them within the week. Scope is on the mount. Everything is set up. Aligned the finder. Sky is still blue. Hope it sticks for a little longer. I just want to see one star.
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  #79  
Old 08-11-2018, 09:19 PM
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Couple of shots taken with the NEX-5 at sunset tonight. Achernar and NGC104. 15s unguided. The fov looks a lot better than the Mewlon 210. Collimation is still a little out and I haven't touched it. Seeing is not the best. Pretty happy with sharpness and contrast though. Just set up the QHY9 mono with UV/IR cut LUM filter now waiting for the clouds to clear and try some long exposures.
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  #80  
Old 08-11-2018, 10:46 PM
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Achernar single 3min exposure LUM QHY9 guided and very heavily strecthed. Pretty happy with the stars in the field at that FL. Image scale is 0.42asp and fov 24' x 18' . The double diffraction spike tells me what I already knew when I checked visually, the secondary is not quite centered and the spider vanes are not exactly square. When I get the TAK collimation scope I'll be able to tweak that and recollimate. I reckon the scope will perform exceptionally well once I get it right. The FL on this shot is 2.6m.

Added 7x2min so 14min LUM on the trap uncalibrated. Limiting factor is going to be my guiding. But exciting times ahead. I have now a scope I can't even get the best out of yet. Very sharp and such a nice flat field compared to the C11. It gathers less light but the quality of the data can't compare off axis.
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Last edited by multiweb; 09-11-2018 at 08:16 AM.
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