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ZWO EAF Focuser

astrophotography equipment imaging
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16 replies to this topic

#1 mxcoppell

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Posted 24 March 2019 - 01:29 PM

https://astronomy-im...product/zwo-eaf

 

Looks very interesting. Not sure how the L bracket is attached to the focuser though. But from the design, I think it's better than the Sesto Senso I am using at the moment (attaching to the focuser). 



#2 orangeusa

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Posted 25 March 2019 - 12:58 PM

So, it's not out yet.. But this is a step in the right direction. 



#3 mxcoppell

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Posted 25 March 2019 - 05:29 PM

Well, not sure if it breaks the rules again. These are from Chinese Astronomy Forum (bbs.imufu.cn). They are not stock pictures. 

 

Original post address: http://bbs.imufu.cn/...read&tid=781021. I will add translation for each picture.

 

Packaging Content

220108qhhpudcdqjcix8xd.jpg

 

High quality build

220107cgt8131v8fvdmouf.jpg

 

220107m53a5j6yxyadoe9o.jpg

 

221027qpbbx0tn6duxztat.jpg

 

The face plate is made of stainless steel. Very solid.

220107xvx3xsccjihuucjc.jpg

 

 

Dimension 6cm x 5cm x 4cm, 277g

220107n6dki6lkodymi7my.jpg

 

4 couplings, on scope focuser side, the diameters are 4mm/5mm/6mm/7mm (duh, FSQ-85 are 3.5mm and 8mm).

220106k9qsrbl5u99wffbf.jpg

 

220106z54s3j5j5l84ql5j.jpg

 

The OP's scope is Takahashi as well and the L-bracket plate doesn't match.

220107vharj1fnl0n900sv.jpg

 

ASCOM Interface

220106g0hu0opetioylkio.jpg


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#4 mxcoppell

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Posted 25 March 2019 - 05:32 PM

Here is another one: http://bbs.imufu.cn/...read&tid=780491



#5 mxcoppell

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Posted 25 March 2019 - 05:33 PM

There are 2 missing pieces of ASIAir - Polar Alignment and AF. Now one is filled.


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#6 alpo16000

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Posted 28 May 2019 - 02:56 AM

The first batch of ZWO EAF is on the way (tracking number received) !!!
I'll receive mine Friday (ordered on zwo website)
So happy  whee.gif


Edited by alpo16000, 28 May 2019 - 06:31 AM.


#7 Tapio

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Posted 28 May 2019 - 03:41 AM

Just waiting of actual reports. The driver/software part is interesting (as QHY/ZWO) sometimes could have done better...



#8 ChrisWhite

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Posted 29 May 2019 - 09:24 AM

I agree it's pretty cool to keep seeing new stuff roll out of these companies.  I think this is a nice missing step for the ASIair, however I won't use that system until they integrate an ascom focuser that can utilize moonlite/optec, etc... 



#9 Biggen

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Posted 29 May 2019 - 11:27 AM

Can the focuser only be used with the ASIAIR?

 

Edit: Nevermind.  I see it's ASCOM compatible.


Edited by Biggen, 29 May 2019 - 11:28 AM.


#10 davidparks

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Posted 29 May 2019 - 10:26 PM

Nicely packaged, arrived direct from China to Michigan in 5 days (over the holiday weekend even).

I found it easy to install on my William Optics Zenithstar 73, however, no instructions were included.

 

I made another post over in this thread with a bit of a comparison with the Sesto Senso.

 

Seems to work great in both ASCOM and ASIAIR.  Hopefully I’ll see clear skies soon waytogo.gif


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#11 davidparks

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Posted 29 May 2019 - 11:21 PM

Focusing test went really well!  I didn’t use the Bahtinov Mask, just the focus assistant in ASIAIR.  I felt I was able to achieve very fine focus quickly and easily.  The ASIAIR Goto, Platesolving/Sync/Center, and Guiding also worked perfectly, even though I had only set the scope level and pointed at Polaris.  No other Polar Alignment done.   My RMS error was 6, but still the ASIAIR guided just fine for 10 minutes or so while I fiddled with focus, exposures, etc.

 

I am really quite impressed with how the EAF and ASIAIR work together.

 

22n5ec.jpg



#12 DevilJack

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Posted 30 May 2019 - 01:08 PM

David,

 

Which version of the EAF focuser did you need for your ZS73?

 

Thanks - JG



#13 davidparks

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Posted 30 May 2019 - 02:08 PM

David,

 

Which version of the EAF focuser did you need for your ZS73?

 

Thanks - JG

I ordered just the Standard Version, because I don't plan to use temperature compensation, and didn't want to wait for the Hand Controller to become available  (I'll be able to purchase that separately when it becomes available).   Of the 4 bushings, I believe it was the 3rd largest size that fit the WO Z73.  The smallest bushing fit the fine focus shaft on the right side of the WO Z73, but the bracket would not clear the outer race of coarse/fine shaft housing.  It would be way too slow attached to the fine shaft anyway.

 

The EAF comes with 4 different flexible bushings to accommodate common size focus shafts.  The mounting bracket can also be utilized for many different focusers, as it is slotted and can "flip over" to be used one way or another to fit many scopes.  I would check the list of compatible scopes on ZWO's product page, and also look in their forums, as many questions and answers about "will it work with this scope..." has been answered there.  I believe ZWO will also be making other brackets available for more scopes at some time.



#14 mxcoppell

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Posted 31 May 2019 - 02:25 AM

@david,

 

You got it! I haven't received mine from HP yet. First question first, David, how do you compare the easiness of installation between EAF and Sento Senso?

 

Please, some pictures of the EAF on the scope?

 

Thanks!


Edited by mxcoppell, 31 May 2019 - 02:27 AM.


#15 davidparks

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Posted 31 May 2019 - 10:49 AM

So far it seems very nice, I am hoping for clear skies yet tonight, but I did get about 15 minutes with it before clouds rolled in.  Working with the ASIAIR which also now has Polar Alignment (waiting for the iOS update) the focuser works really good.

 

Here is a bit of info I posted with some pictures:  https://www.cloudyni...otor/?p=9398121



#16 Der_Pit

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Posted 01 June 2019 - 07:59 AM



The smallest bushing fit the fine focus shaft on the right side of the WO Z73, but the bracket would not clear the outer race of coarse/fine shaft housing.  It would be way too slow attached to the fine shaft anyway.

 

YMMV, but my experience with using the fine shaft for motor focus are bad anyhow: At least mine has a non-reproducible slip that likely depends on temperature and resistance (i.e., on pointing, due to varying gravity pull on the camera).  Might be different for other/better setups (though mine is an Astro-Physics...), but I can turn the fine knob while preventing actual movement by holding the coarse one on the other side.

The slowness was not a real issue, but the autofocus routine went crazy and was unable to determine proper focus.

 

As for the EAF: While I already have a motor focus for my scope (Pegasus DMFC), I'm highly tempted to just order one of the ZWO units.  They are really building very nice stuff....


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#17 niccoc1603

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Posted 15 June 2019 - 08:10 AM

How do you set the focuser step size?


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