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how to screw the daystar quark onto M42

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8 replies to this topic

#1 joelin

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Posted 25 January 2023 - 02:38 AM

My focuser has M42 threads at the end of it. I want to screw the daystar quark onto it instead of using the 1.25" compression ring that I have.

 

Is there a way to do this? What kinds of adapters do I need?


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#2 MalVeauX

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Posted 25 January 2023 - 07:59 AM

Hi,

 

The Quark uses non-standard threads. You'd need a custom adapter with the right thread pitch. RAF Camera would be the best solution for this and may already have one.

 

Maybe like this: https://rafcamera.co...42x1f-to-m35x1m

 

Very best,


Edited by MalVeauX, 25 January 2023 - 09:40 AM.


#3 SgrB2

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Posted 25 January 2023 - 08:13 AM

This will work,  provide a solid coupling, and minimize Newton's rings.

M = male

F = female

( =  lens of FR

FR = 2" GSO focal reducer

> or < means direction of screwing in

Numbers like 35x1 means 35mm diameter x 1mm pitch

                      42x0.75 means 42 mm diameter x 0.75 pitch

 

Cheers,

SgrB2

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#4 0ak3

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Posted 25 January 2023 - 08:13 AM

https://agenaastro.c...apter-sz1t.html

Available from other vendors as well
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#5 PatrickVt

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Posted 25 January 2023 - 09:18 AM

If you unscrew the 2" nosepiece from the bottom of the Quark, you are left with m48 female threads at the bottom of the Quark.  If you put an adapter that goes from m48 male to m42 female on that, then you could attach it to the appropriate amount of m42 extensions and connect to your m42 focuser.  Alternately, you can use m48 threaded extension tubes rather than m42....  then use the m48 to m42 adapter at the focuser.  Just make sure you end with what need...  male or female...  I assume you need to end with female threads to connect to male threads on the focuser.  

If you thread this together, then you must use the 1.25" UV/IR Cut filter on the 1.25" end of the Quark rather than on an extension tube deep in the focuser.  For smaller apertures, you shouldn't have a problem though.  Of course, if you have a front-mounted ERF, then you have no need for the UV/IR Cut filter.  

 

Now, if you want to eliminate all compression fittings, then you would also need to get your hands on the m42 thread adapter for the top side of the Quark too.  That is a Daystar product unless you have one fabricated.  Then you can thread the camera to the Quark as well.  

 

Patrick


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#6 Skywatchr

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Posted 25 January 2023 - 11:09 AM

If you unscrew the 2" nosepiece from the bottom of the Quark, you are left with m48 female threads at the bottom of the Quark.

 

Patrick

This is good to know.  Thanks Patrick. waytogo.gif


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#7 dicksonfu

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Posted 31 January 2023 - 11:30 AM

Good to know it. Thanks!

 

By the way, any solution to eliminate the newton ring (fringe) effect in such configuration?

 

https://agenaastro.c...apter-sz1t.html

Available from other vendors as well


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#8 Skywatchr

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Posted 31 January 2023 - 12:09 PM

Good to know it. Thanks!

 

By the way, any solution to eliminate the newton ring (fringe) effect in such configuration?

https://agenaastro.c...adapter-ii.html

 

Works for any T-Thread (42mm)


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#9 Skywatchr

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Posted 31 January 2023 - 12:12 PM

My focuser has M42 threads at the end of it. I want to screw the daystar quark onto it instead of using the 1.25" compression ring that I have.

 

Is there a way to do this? What kinds of adapters do I need?

To eliminate Newton's Rings

 

https://agenaastro.c...adapter-ii.html

 

To use T-Thread cameras on the Quark instead of using the eyepiece holder.

 

https://agenaastro.c...apter-sz1t.html




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