What's wrong???

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Re: What's wrong???

Post by PDB »

Maurits,

doesn't the 2" nosepiece you are using (left) no internal thread on the scope side?
If yes I would try to place the reducer there and see.

That is the only combination I can make it work (with adapters I have) with a 1.25" GSO

Camera - Nosepiece - Reducer ---> eyerpiece adapter of the Quark.

P.


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Re: What's wrong???

Post by MAURITS »

Third pic: This has a lot of vignetting.
Tree.jpg
Tree.jpg (128.37 KiB) Viewed 1173 times
Four pic: This is my 2" focal reducer with stepdown ring (2" to T2)
four.jpg
four.jpg (149.32 KiB) Viewed 1173 times

When I put the reducer with stepdown ring on the camera (T2 frontside) then I have no connection possible with the eliminator (T2).


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Re: What's wrong???

Post by PDB »

Will make some pictures tomorrow. (Camera in use at the moment ...)

P.


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Re: What's wrong???

Post by MAURITS »

Thanks Paul ...
Last edited by MAURITS on Sun Feb 17, 2019 9:20 pm, edited 1 time in total.


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Re: What's wrong???

Post by MAURITS »

MalVeauX wrote: Sun Feb 17, 2019 1:22 pm Here's how I use a 2" FR on the ASI174MM. It threads with a step up ring. This inserts into the Quark's eyepiece and there's minimal vignetting.

ASI174MM_2inchFR.jpg

Very best,
Marty how do you connect your tilt adapter, is it T2 or 2"?


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Re: What's wrong???

Post by MalVeauX »

I think it's T2? It's the standard ZWO tilt adapter so it threads directly to their cameras. I can put my 2" after the tilt adapter too, it vignettes there like yours.

Very best,


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Re: What's wrong???

Post by MAURITS »

Thanks Marty, I believe I need a new stepdown ring from 2" male (on reducer front side) to T2 female (on eliminator back side).
So the imaging train would be: extensions, Quark, eliminator with on the front a 2" noisepiece, after the eliminator the reducer, after the reducer the camera.

The space between the reducer and the eliminator is for the new stepdown ring (2" to T2).

A simulation pic as example.
Five.jpg
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Re: What's wrong???

Post by MalVeauX »

Are the newtonian rings so bad that you need the eliminator?

I actually don't even use my tilt adapter when doing high res. I don't have rings, and even when I sometimes do, a flat calibration frame removes them.

I use my tilt adapter mainly for full discs where I cannot do calibration frames.

Very best,


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Re: What's wrong???

Post by MAURITS »

Marty when the weather stay good I will try again without the eliminator and see what it is.
Indeed, with flat frame calibration I can try to remove them, I look forwards.


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Re: What's wrong???

Post by PDB »

Hello Maurits,

going through my older notes, realized I never got it working with the reducer in front of the NR eliminator. (Luckaly if I put the reducer in front of the ASI178 there are no NR's) But got some inspiration from this post to try a few other combinations. (But busy with other things like making a new motor focus controller, writing the software for it ...)

Regards,

Paul


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Re: What's wrong???

Post by MAURITS »

Thanks Paul for the note.


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Re: What's wrong???

Post by MAURITS »

Incredible but everything right away works fine for HR imaging the sun.
I have removed the eliminator.

So my imaging train is now: extensions, Quark with 2" eyepiece holder, 2" reducer in the Quark's eyepiece holder and the camera there behind.
I don't see newton rings … :D

Along this way, I would like to thank everyone who has helped me. :bow
Final.jpg
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