Collimation RH200

Ioan Popa:
Hello Jose,

My friend collimated my RH200 and more than 1 year later, it's still amazing, he used a few tools, some made by him and the Hotech Advanced CT collimation (although it's a very annoying tool). He also used a howie glatter for the focuser.

He took it apart to align the primary and the focuser and after aligned the corrector. 

He has collimated 3 scopes 2 x Mk1 and his an AT and they are all pretty impressive in what he achieved, so much so one of the retailers in California asked him to colimate another one for them.

I personally look at the collimation with Al's collimation aid and the SkyX and the tilt I use the collimation option in the SkyX with the four corners on a loop, it's pretty helpful, happy to share more info or ask my friend to comment in this thread.

thanks,
ioan

José Carlos Rodríguez:

Ioan Popa:
Hello Jose,

My friend collimated my RH200 and more than 1 year later, it's still amazing, he used a few tools, some made by him and the Hotech Advanced CT collimation (although it's a very annoying tool). He also used a howie glatter for the focuser.

He took it apart to align the primary and the focuser and after aligned the corrector. 

He has collimated 3 scopes 2 x Mk1 and his an AT and they are all pretty impressive in what he achieved, so much so one of the retailers in California asked him to colimate another one for them.

I personally look at the collimation with Al's collimation aid and the SkyX and the tilt I use the collimation option in the SkyX with the four corners on a loop, it's pretty helpful, happy to share more info or ask my friend to comment in this thread.

thanks,
ioan

hi ioan.
Thanks for answering.
I've tried using the hotech, but I don't quite understand how to apply the general instructions to the RH200, as it is quite different from everything else.
If you can ask your friend to comment, I'm sure many other users will appreciate it as much as I do.

All the best.
José

Peter Bresler:
Luca Bonatto at O S is quite responsive but shipping the scope would cost a fortune. It was about $300 shipping plus 200 euros for a 2 kg replacement dew shield (which did not fit.)

Peter

Ioan Popa:

José Carlos Rodríguez:
I also put a photo of M17 from 07-25.
As you can see there is nowhere to take it.

can I get a high res link via google drive, or something.

Few small tips, maybe you area already doing this.

1. Always have your camera align with the for corners of the tilt plate, on the qhy 600m the screw for the desiccant should be in the middle of the scope, pointing up or down.
2. Make sure all flanges are snug but not over tight, do that with the scope pointing down so gravity can fix some of the tilt naturally.
3. Center a star and use this collimation aid http://sweiller.free.fr/collimation.html to measure the collimation of the primary.
4. If your camera is screwed into the "tilt" adapter from QHY, make sure that's not tilted by point the scope down on the mount and centering the camera in that adapter.

If the collimation is okay in the center, check the rest of the frame if you have weird stars 1/3 of the way in and more importantly different parts of the image have different star distortions, it might be more serious.

By thy way, if you are lost and really annoyed, Officina Stellare can also collimate your scope, it's about 500 euros or something, I have a contact there if you need an email but that's only if you can't figure it out.

I personally look at Tilt like backfocus on a reducer/corrector if the stars are pointing towards the inside you need more space, if they are rotating along the center axis you need less space in the corner, you need to move 2 parts at a time, top, left, right or bottom or even diagonally (That be harder) the lock screws have to be unlocked for all 4 corners, as you move a corner it might affect the others but with a good view of what you are doing it will take a few hours to get it right. This is all given that you have perfect collimation of the primary and corrector plate.

I can ask my friend if he can do a zoom with you and discuss this hotech advanced collimation aid (he uses it but it annoys him quite a bit).

thanks,
ioan

• I don't understand this well:  "I personally look at Tilt like backfocus on a reducer/corrector if the stars are pointing towards the inside you need more space, if they are rotating along the center axis you need less space in the corner, you need to move 2 parts at a time, top, left, right or bottom or even diagonally (That be harder) the lock screws have to be unlocked for all 4 corners, as you move a corner it might affect the others but with a good view of what you are doing it will take a few hours to get it right. This is all given that you have perfect collimation of the primary and corrector plate."

• "I can ask my friend if he can do a zoom with you and discuss this hotech advanced collimation aid (he uses it but it annoys him quite a bit)."
• [i] [/i]For now it is not necessary to bother your friend, I am not fluent enough in English to zoom in on him, unless he speaks Spanish.
• Just ask him which tool he prefers to collimate.

Ioan Popa:

Peter Bresler:
Luca Bonatto at O S is quite responsive but shipping the scope would cost a fortune. It was about $300 shipping plus 200 euros for a 2 kg replacement dew shield (which did not fit.)

Peter

The RH200 scopes are weird, made in batches, they are pretty much unique, so they might know if they had the serial number, Luca is pretty good, working with him to get the reducer for my RH200.

Jose, check out my image gallery, there's a quite a few examples of what my RH200 can do, I don't use a rotator (interesting set up you have)

here's my scope https://www.youtube.com/watch?v=02wet2LKSno and there's photos of my friend collimating it

ioan

José Carlos Rodríguez:

Ioan Popa:

Peter Bresler:
Luca Bonatto at O S is quite responsive but shipping the scope would cost a fortune. It was about $300 shipping plus 200 euros for a 2 kg replacement dew shield (which did not fit.)

Peter

The RH200 scopes are weird, made in batches, they are pretty much unique, so they might know if they had the serial number, Luca is pretty good, working with him to get the reducer for my RH200.

Jose, check out my image gallery, there's a quite a few examples of what my RH200 can do, I don't use a rotator (interesting set up you have)

here's my scope https://www.youtube.com/watch?v=02wet2LKSno and there's photos of my friend collimating it

ioan

I've been watching the video. Very interesting. Excellent job with the nebula.
But as I have put in the comment of the video, what I don't know very well is how you can get to the collimation and inclination screws with the ESATTO. Doesn't everything block you?

Peter Bresler:


This is my setup, I also am dealing with tilt or collimation issues now. One corner is out of focus....I am only adjusting tilt. I may need to live with it.

Peter