Interference eliminator and tilt adjuster

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pedro
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Interference eliminator and tilt adjuster

Post by pedro »

Interference eliminator and tilt adjuster

Newton rings and banding can be eliminated or reduced using a tilt adjuster. Check out a few examples below:

Daystar interference eliminator
TS tilt adjuster...
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Re: Interference eliminator and tilt adjuster

Post by marktownley »

The daystar interference eliminator is my personal favourite Pedro. I use mine on the ep end to connect it and the camera to the quark.


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Re: Interference eliminator and tilt adjuster

Post by pedro »

Thanks Mark

I use mine before the camera. I used the Daystar today for the first time and it's great, not cheap though


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Re: Interference eliminator and tilt adjuster

Post by MAURITS »

Very nice detail pictures Pedro.
I like my Daystar Eliminator a lot.


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Re: Interference eliminator and tilt adjuster

Post by Rusted »

The cheapest tilt plates with thumbscrews are awful IMO.
The push & pull thumbscrews are far too close together to allow easy adjustment.
I intended to fit mine with hex socket head screws so I can adjust the tilt with a long series hex key or hex driver.
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Re: Interference eliminator and tilt adjuster

Post by Merlin66 »

I use the ZWO T2 tilter on both my ASI 174 and ASI 1600 cameras.
I agree the screws can be fiddly but once done never need to move.
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Re: Interference eliminator and tilt adjuster

Post by Carbon60 »

The Daystar product looks nicely engineered. I guess you get what you pay for. :)

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Re: Interference eliminator and tilt adjuster

Post by pedro »

I have both, cheapest tilt plates and daystar interference eliminator. The best is the daystar acc but it is also expensive


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Re: Interference eliminator and tilt adjuster

Post by Montana »

I have the ZWO tilt adaptor and my brain physically cannot work out how to move it in any way. It always move the opposite way to what I want or is too tight to move, then you loosen it and you are back to square one. I have no idea in the slightest how to use it, I just don't understand the mechanism.

Alexandra


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Re: Interference eliminator and tilt adjuster

Post by Rusted »

Montana wrote: Sun Oct 27, 2019 9:56 am I have the ZWO tilt adaptor and my brain physically cannot work out how to move it in any way. It always move the opposite way to what I want or is too tight to move, then you loosen it and you are back to square one. I have no idea in the slightest how to use it, I just don't understand the mechanism.

Alexandra
Play with the tilt plates while free of the telescope and camera to familiarize yourself with its movements and to gain confidence.

The system is a push-pull mechanism. Meaning that three screws push the plates apart and three screws pull the plates back together.
Both types of screw are arranged side by side. The large screw heads pull in. The smaller ones push the plates apart.
You can only push in one place if you loosen all the pull screws.

The pairs of screws are arranged 120° apart.
To separate one area of the plate you must loosen all the pull screws and then screw only one push screw in.
The confusion lies in that all three pull screws need to be loosened to get the plates to separate at all.
If you don't loosen them all the plates remain tightly fixed together.

So loosen all the pull screws first. But not too much so it all falls apart in your hands.
Now tighten only one push screw. This will separate the plates in one place. This is a good starting point.

Now re-tighten the other pull screws gently. So that the plates still have an open "wedge" between them.
The other push screws can now be gently tightened to take up the slack. This is the basic arrangement.
Once satisfied all the screws can be tightened finger tight.

The main problem is finding the ideal tilt angle between the plates.
And, the best orientation of the plates around the camera axis.


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Re: Interference eliminator and tilt adjuster

Post by Rusted »

Apologies if your ZWO tilt plate adapter has socket head screws [like Pedro's top image]
Rather than the big thumbscrews shown in my image above.
I ordered ZWO but may have received a clone.

If this is the case then the system is identical but the screws just look different to mine.


http://fullerscopes.blogspot.dk/

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Lunt 60MT etalon, Lunt B1200S2 BF, Assorted T-S GPCs or 2x "Shorty" Barlow, ZWO ASI174.
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Re: Interference eliminator and tilt adjuster

Post by marktownley »

Montana wrote: Sun Oct 27, 2019 9:56 am I have the ZWO tilt adaptor and my brain physically cannot work out how to move it in any way. It always move the opposite way to what I want or is too tight to move, then you loosen it and you are back to square one. I have no idea in the slightest how to use it, I just don't understand the mechanism.

Alexandra
Sell it and get the Daystar one, so much easier to use.


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Re: Interference eliminator and tilt adjuster

Post by Merlin66 »

Pedro shows the TS tilter, which looks different to the ZWO version (which has the thumb screws).


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Re: Interference eliminator and tilt adjuster

Post by pedro »

Imagesolar_imaging_session_20191026-06 by Pedro Ré, on Flickr
Daystar interference eliminator + QUARK Chromosphere + ASI174MM

Imagesolar_imaging_session_20191026-041 by Pedro Ré, on Flickr
Daystar interference eliminator + QUARK Chromosphere + ASI174MM


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Re: Interference eliminator and tilt adjuster

Post by Starry Jack »

Egad. Now I worry I did not do it right! I have the $30 ZWO with thumb screws and got it working in about three minutes. Never touched it since and never have rings.


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Re: Interference eliminator and tilt adjuster

Post by Merlin66 »

Jack,
Sounds OK to me.....


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Re: Interference eliminator and tilt adjuster

Post by MAURITS »

Starry Jack wrote: Fri Nov 01, 2019 1:33 am Egad. Now I worry I did not do it right! I have the $30 ZWO with thumb screws and got it working in about three minutes. Never touched it since and never have rings.
It depends from setup to setup.
I tried this too but it failed to remove the NR, when you have too much tilt, than you create other problems.
The only solution was the Daystar Interference Eliminator, with a min. tilt NR problem solved.


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Re: Interference eliminator and tilt adjuster

Post by Merlin66 »

Maurits,
Tilt is tilt no matter what the mechanism....


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Re: Interference eliminator and tilt adjuster

Post by MAURITS »

Merlin66 wrote: Fri Nov 01, 2019 8:56 am Maurits,
Tilt is tilt no matter what the mechanism....
I agree, but the Daystar Interference Eliminator tilts the camera off-normal by up to 5° while keeping the center of the image sensor stationary, so that focus, framing, and vignetting are not affected.
This was my extra problem (vignetting) with my ZWO tilter.


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Re: Interference eliminator and tilt adjuster

Post by pedro »

IMHO the Daystar Interference Eliminator is the best choice


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Re: Interference eliminator and tilt adjuster

Post by Starry Jack »

I do believe I have some vignette for sure. I just did not have the funds.

BTW my unit is between the camera and quark not quark and telescope.


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Re: Interference eliminator and tilt adjuster

Post by pedro »

I also use the daystar interference eliminator between the camera and the quark


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Re: Interference eliminator and tilt adjuster

Post by Merlin66 »

Hmmm
I'm not sure I have ever used tilts up to 5 deg....At the 70mm centres of the ZWO tilter this would mean an "opening" of just over 6mm!!!
I'm working with the ASI 1600, x2.5 PM with an "opening" tilt of 2.3mm. I don't seem to be experiencing any vignetting with this set-up.


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Re: Interference eliminator and tilt adjuster

Post by marktownley »

Don't forget there are 2 Daystar interference eliminators, c-mount and t-mount. I have a the c-mount and if I use it with a c to 1.25" nosepiece I have that has not got full clear aperture then I get vignetting, using a c to 1.25" that is full clear aperture its fine.


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Re: Interference eliminator and tilt adjuster

Post by Creativspelerr »

It seems like if you started with a system that had uniform flat focus and Newton rings, then put a tilt on it to eliminate the rings, the focus would no longer be uniform. For night-time astronomy, tilters are used to fix out of focus and elongated starts from sensor tilt. My understanding is that's more pronounced with faster scopes and we are using super-slow scopes, but still, 5 degrees might be fine for newton rings but seems like a lot for the focal plane.
I have no hands-on experience with any any titter, so please excuse my ignorance if the answer is obvious once you use the equipment, I'm just trying to do research in advance.


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Re: Interference eliminator and tilt adjuster

Post by pedro »

These tilters are mainly used reduce newton rings in CMOS cameras. The Daystar interference eliminator is the best I've use so far


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