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Takahashi collimation telescope VS TSCOLLIT Generic equipment discussions · Stellar Nomads · ... · 5 · 165 · 0

Astrodynamix 1.43
Stellar Nomads
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Hello folks,

There is a lot of information circulating about these two tools; the Tak side is legendary it seems and the TS side is brand new ( which does not in any way mean it is less).

My question is: which one are you using and how successful are you? Please share your experiences with either/both.

Thank you
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CCDnOES 8.34
Bill McLaughlin
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Not sure how it would work for an RC since I have not had one for years but for the Epsilon I much prefer the OCAL electronic collimation device.

I have used lasers and the Tak scope and the OCAL and the OCAL was the most consistently reliable.
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Kassar 0.90
ArvitZ
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Stellar Nomads:
Hello folks,

There is a lot of information circulating about these two tools; the Tak side is legendary it seems and the TS side is brand new ( which does not in any way mean it is less).

My question is: which one are you using and how successful are you? Please share your experiences with either/both.

Thank you

I used both my Takahashi and the TSRCKOLLI (different than TSCOLLIT) to collimate my RC 8" and to be quite honest I can not recommend both when you really want to pin down the collimation of a RC scope.
To my understanding the main problem is that both of these tools mainly look at alignment of the telescope tube with respect to the mirrors. But I have to face the reality that at least for my GSO telescope the tube is NOT perfectly aligned with the optical axis of my main mirror.
I have used both collimators to have a first rough alignment but the real deal is the star test in the end.
The star test still showed elongated stars in one corner for me and this tells me that the true optical alignment was in my case not possible with both collimators.

After this experience I decided to follow similar guides like the one linked below to achieve the optical alignment with a star field under the night sky. It was a bit of a hustle, but it was the best option. Because otherwise I would have had no other option than getting an expensive collimation laser.

https://astrophotoni.st/wp-content/uploads/2021/03/RC-collimation.pdf
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whwang 15.16
Wei-Hao Wang
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ArvitZ:
After this experience I decided to follow similar guides like the one linked below to achieve the optical alignment with a star field under the night sky. It was a bit of a hustle, but it was the best option. Because otherwise I would have had no other option than getting an expensive collimation laser.

https://astrophotoni.st/wp-content/uploads/2021/03/RC-collimation.pdf

For star collimation, this is indeed the easiest one to operate, among all that I have seen.
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Astrodynamix 1.43
Stellar Nomads
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ArvitZ:
After this experience I decided to follow similar guides like the one linked below to achieve the optical alignment with a star field under the night sky. It was a bit of a hustle, but it was the best option. Because otherwise I would have had no other option than getting an expensive collimation laser.

https://astrophotoni.st/wp-content/uploads/2021/03/RC-collimation.pdf

This why this community is so awesome !!!!! I did not even know this manual existed and I am so thankful you guys shared it.

I am using the 3in TSRCRED, would you recommend I collimate with or without it ?
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Kassar 0.90
ArvitZ
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Stellar Nomads:
ArvitZ:
After this experience I decided to follow similar guides like the one linked below to achieve the optical alignment with a star field under the night sky. It was a bit of a hustle, but it was the best option. Because otherwise I would have had no other option than getting an expensive collimation laser.

https://astrophotoni.st/wp-content/uploads/2021/03/RC-collimation.pdf

This why this community is so awesome !!!!! I did not even know this manual existed and I am so thankful you guys shared it.

I am using the 3in TSRCRED, would you recommend I collimate with or without it ?

Glad to see that the community can help

To start of with collimation I personally have removed everything from the light path that could possibly interfere. Mainly because you want to spot very tiny visual artefacts that are a result of your mirror alignment and no other sources of aberrations (like a corrector).

As far as I understand this (but I could be mistaken) if you achieved perfect collimation of the scope you should not have any problems with a corrector (if you put it at the exact specified backfocus).
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