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Finally made an R/C Collimation adapter

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#201 nateman_doo

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Posted 11 August 2022 - 02:38 PM

What focuser do you use?

Mine is a Baader Diamond Steeltrack RT with 80mm of range

I use a rack and pinion one that looks just like yours.

 

https://www.teleskop...avel-95-mm.html



#202 Mert

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Posted 11 August 2022 - 02:55 PM

Ah, ok! I already have a 3d printed extension for the baffletube, works great!

Edited by Mert, 11 August 2022 - 02:55 PM.


#203 Mert

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Posted 11 August 2022 - 04:06 PM

Here you can see my version 1, nowadays I have improved the extension

and it works great!

I used the same angle as the baffle tube has so the extension continues

with this angle.

 

 

Attached Thumbnails

  • 20220110_182932-CN.jpg

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#204 Mert

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Posted 12 August 2022 - 07:29 AM

Hope to have some clear sky tonight to do some test shots :cool:

#205 Mert

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Posted 12 August 2022 - 04:02 PM

Ok, I did some test frames of 10 seconds, Focal length with reducer now 1255mm

instead of 1148mm before mounting and collimating with the new tiltplate.

Focus is much better then before and the ASTAP results speak for themselves.

I will have to fine adjust a bit more but this is with the scope collimated

during daytime with my Takahashi collimating scope.

Right now I am impressed!

 

 

Attached Thumbnails

  • 22-27-24_-15.00_10.00s_139_10_29.80-7871_0000-CN.jpg


#206 nateman_doo

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Posted 12 August 2022 - 04:29 PM

Looks lovely. I think I stopped at 7% visually aligning. Never bothered to tweak it any further. Next new moon I may touch it up as a Cherry Springs Star party is coming up in Sept.

#207 ekallgren

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Posted 12 August 2022 - 04:56 PM

Mert,

That look very good!

I'm still waiting on clouds or full moon.



#208 Mert

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Posted 12 August 2022 - 05:07 PM

Right now I started a sequence on IC1396 with the L-Extreme filter.

Let's see how that turns out.

The sky is really sh.t, looks like my flatpanel and some high haze/clouds

making HFD go higher.

Evenso with 120 second exposure stil around 3.35 with imagescale 0.625"/pixel

so aprox. FWHM 2"

With ASTAP the calculated SQM of 1 frame is 17.39 ( Bortle 8 :thinking: )



#209 Mert

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Posted 12 August 2022 - 05:22 PM

And here the aberration inspector of Pixinsight on 1 frame

of 120 seconds.

Maybe something not 100% in the lowerleft corner.

Upperleft corner has almost no stars but in Pixinsight

zooming in on some stars they look nice and round everywhere.

Attached Thumbnails

  • _23_56_44_15_10_120_00s_139_10_27_00_7826_0017_RGB_Bilinear_mosaic-CN.jpg

Edited by Mert, 12 August 2022 - 05:28 PM.

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#210 nateman_doo

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Posted 12 August 2022 - 06:50 PM

Pretty sure just stacking will make that look better, or the stars themselves are deformed. Flat earther stars. 😆

Either way it's lovely isn't it? I have never been more excited to use the RC since I made the adapter.

Edited by nateman_doo, 12 August 2022 - 06:51 PM.


#211 Mert

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Posted 13 August 2022 - 12:53 AM

Yes it does look great "straight out of the box"
It only took me 2 hours or something to mount everything and collimate with the Takahashi collimating scope.
I'm exited to see better focus and lower HFD value then before!
I got clouded out but will post the resulting image.

Edited by Mert, 13 August 2022 - 12:54 AM.


#212 Mert

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Posted 13 August 2022 - 08:18 AM

As promised, the result of only 76 x 120 seconds, RC8 with nateman_doo's
tiltplate, CCDT67 reducer, ASI1600MCC ( OSC ) and L-Extreme filter.
This was processed as a SHO image shrug.gif
Clouds prevented me from grabbing more frames.
Anyway, the sky was whitish and with high haze and quit strong
wind gusts, so it's not too bad for bortle 8 conditions.
Also full moon did it's thing.
The target was IC 1396 or also know as the elephant trunk.
I'm quit happy with the way the stars are, seems to be close to
a good collimation.

Attached Thumbnails

  • IC1396_081322-76x120 RC8 reducer New_tiltplate_Mutilva.CN.jpg

Edited by Mert, 13 August 2022 - 08:21 AM.

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#213 Mert

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Posted 13 August 2022 - 02:07 PM

Still some work to be done since I forgot completely

to check collimation of the focusser.

Today I did  a little fine adjustment to the tiltplate and

the secondary to make the Takahashi collimating scope

and the laser collimator coincide.

Now waiting for some clear skies.

Attached Thumbnails

  • Gamma_Cass.jpg

Edited by Mert, 13 August 2022 - 02:07 PM.


#214 nateman_doo

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Posted 13 August 2022 - 02:10 PM

Id ditch the Takahashi for one reason, its using mechanical.

 

Bounce a laser on the secondary in the center ring by adjusting the tilt plate, and bounce it back to the laser by adjusting the secondary.

 

Then play with the primary with the Takahashi if you want and finish with a star test, and adjust with ASTAP image inspection.  


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#215 Mert

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Posted 13 August 2022 - 02:28 PM

Id ditch the Takahashi for one reason, its using mechanical.

Bounce a laser on the secondary in the center ring by adjusting the tilt plate, and bounce it back to the laser by adjusting the secondary.

Then play with the primary with the Takahashi if you want and finish with a star test, and adjust with ASTAP image inspection.


I'm quit confident with the precision of the Takahashi collimating scope and simply did not
check how things are with the focusser.
Now all looks centered and fit for a new test session :cool:

#216 ekallgren

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Posted 15 August 2022 - 12:24 AM

I'm quit confident with the precision of the Takahashi collimating scope and simply did not
check how things are with the focusser.
Now all looks centered and fit for a new test session cool.gif

fingertap.gif fingertap.gif fingertap.gif  we are waiting!


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#217 Mert

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Posted 15 August 2022 - 01:01 AM

Must be good since I'm still clouded out shrug.giffingertap.gif


Edited by Mert, 15 August 2022 - 11:57 AM.


#218 ekallgren

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Posted 15 August 2022 - 10:57 AM

That is the same thing that has happened to me.

  I hope to have a few hours on IC1340 the Bat Nebula.



#219 ekallgren

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Posted 15 August 2022 - 02:28 PM

This is about 4 hrs of data on IC1340 the Bat Nebula.

 

As you might remember that I had near perfect collimation as in post #113 where the Tilt measured .08 and the Off Axis Aberrations were .26.

I then installed the CCDT67 which gave me a fl of 1171 @f5.9.

But it also changed the Tilt. to .42 and the Off Axis Aberrations are now .29. This is not enough to make me want to mess with the Collimation any further, so I 'm going to stop there. Very happy with the added nateman_doo tilt plate. It holds collimation as good as any other scope in my arsenal and they are all Refractors.  

Thumbs up to nateman_doo! waytogo.gif   bow.gif

Attached Thumbnails

  • IC1340_HOO_1.jpg
  • Screenshot 2022-08-15 121217.jpg

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#220 nateman_doo

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Posted 15 August 2022 - 03:40 PM

I took my CCDT67 out of the image train because I felt it did more harm than good.  But it seems yours is way nicer than mine.  Glad to hear your results are good and the plate is worth the upgrade! 


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#221 Mert

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Posted 16 August 2022 - 03:03 AM

I've also noted that the CCDT67 reducer is not a flattener!
Yesterday I shot a couple out of focus images, 1 shot with a bright Star and tried the abberation inspector of the Nina Hocus Focus plugin.
All indicate I'm very close to good enough.
The tiltplate really performs great, I'm happy to have done the upgrade!
Lateron I'll download the session and post some images.

#222 Mert

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Posted 16 August 2022 - 09:29 AM

Ok, as promised here go 3 images ( due to size limit each in a thread shrug.gif )

For the moment I'm happy with the result.

I think fine tuning under the stars could improve a little bit but doing that in

the dark is a bit of a problem for me ( not so good eyesight ).

So here go the 3 images.

Attached Thumbnails

  • Out of focus_22_41_09_4_50_4_00s_139_10_23_20_6500_0000_RGB_Bilinear-CN.jpg

Edited by Mert, 16 August 2022 - 10:14 AM.


#223 Mert

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Posted 16 August 2022 - 09:30 AM

And #2 showing the star is still a tiny bit "decentered".

I will look into that some other day.

 

 

 

Attached Thumbnails

  • Starfield_22_58_08_15_00_30_00s_139_10_23_00_7482_0000_RGB_Bilinear-CN.jpg


#224 Mert

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Posted 16 August 2022 - 09:31 AM

And last but not least #3

 

 

Attached Thumbnails

  • ASTAP.jpg


#225 Mert

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Posted 16 August 2022 - 12:38 PM

Still not collimated to my taste so I checked again and fine adjusted a tiny bit.

Let's see how that works out whenever I get some clear sky again fingertap.gif


Edited by Mert, 16 August 2022 - 12:38 PM.



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