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Vixen R200SS - what am i doing wrong

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#1 lucian nicu

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Posted 07 July 2020 - 04:41 AM

Hi all.
Hoping that someone can help me with some advice, I attach here a short presentation of the problem, as well as 3 photos as samples.
I recently bought a Vixen R200SS (an older model - picture attached) and, after washing the mirrors and collimating, I hoped to put it to work. I was unable to reach any results although I tried to use both the dedicated coma corrector (picture attached) and a Baader coma corrector (MPCC Mark III). I don't realize what I'm doing wrong. The last option would be to purchase a newer coma corrector and a dedicated adapter (links attached). But I'm not sure this will solve the problem. Because my experience with Newtonian telescopes is very limited, I wonder if it would not be possible for this problem to be from the telescope.
So, any advice will be welcome and, of course, appreciated.
Thank you very much.

 

Newer coma corrector - https://www.vixenopt...ope-p/37226.htm

Dedicated adapter - https://www.vixenopt...pter-p/2954.htm

 

Attached photos :

1. Telescope.

2. Coma corrector ( which i already have ).

3. Photo using the Vixen coma corrector.

4. Photo without any corrector.

5. Photo using the Baader MPCC Mark III coma corrector.

Attached Thumbnails

  • Vixen R200SS-4.jpg
  • Vixen R200SS coma corrector-1.jpg
  • Vixen corrector-1.jpg
  • NO corrector-1.jpg
  • Baader corrector-3.jpg

Edited by lucian nicu, 07 July 2020 - 04:44 AM.


#2 K.K

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Posted 08 July 2020 - 11:51 PM

There are plenty of people shooting with the R200SS and Baader MPCC Mark III.
https://www.astrobin...arch/?q=R200SS mpc

The distance from the T2 thread of the MPCC to the camera sensor should be 55mm. If the distance is too close or too far, it will not compensate properly.
https://www.baader-p...r-newtons).html2-mpcc-mark-iii-multi-purpose-coma-corre



#3 sixela

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Posted 09 July 2020 - 07:17 AM

Ditto. The spacing between the coma correctors is critical, and you also have collimation issues (tilted focal planes, coma on the centre object) that are independent of the use of a coma corrector (and in the first image probably guiding or field rotation issues too, i.e. mount alignment issues).



#4 dvb

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Posted 06 September 2020 - 12:55 AM

Hi all.
Hoping that someone can help me with some advice, I attach here a short presentation of the problem, as well as 3 photos as samples.
I recently bought a Vixen R200SS (an older model - picture attached) and, after washing the mirrors and collimating, I hoped to put it to work. I was unable to reach any results although I tried to use both the dedicated coma corrector (picture attached) and a Baader coma corrector (MPCC Mark III). I don't realize what I'm doing wrong. The last option would be to purchase a newer coma corrector and a dedicated adapter (links attached). But I'm not sure this will solve the problem. Because my experience with Newtonian telescopes is very limited, I wonder if it would not be possible for this problem to be from the telescope.
So, any advice will be welcome and, of course, appreciated.
Thank you very much.

 

Newer coma corrector - https://www.vixenopt...ope-p/37226.htm

Dedicated adapter - https://www.vixenopt...pter-p/2954.htm

 

Attached photos :

1. Telescope.

2. Coma corrector ( which i already have ).

3. Photo using the Vixen coma corrector.

4. Photo without any corrector.

5. Photo using the Baader MPCC Mark III coma 

Have you had any success with this? I also want to use the Baader MPCC with the Vixen R200ss, but the stock focuser is tricky to work with.


Edited by dvb, 06 September 2020 - 12:57 AM.



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