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Convert your Skywatcher Crayford to dual speed saving $$$

DIY dob reflector
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#1 elrod

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Posted 07 September 2018 - 07:55 PM

  I have been looking into upgrading my Skywatcher 10" collapsible goto dobsonian focuser from a single speed to dual speed. From reading many post on this forum it seems the majority of us amateur astronomers go in order of increasing cost, a GSO, MoonLite or Feather Touch focuser.  I was about to pull the trigger on one of the MoonLite focusers when I stumbled into another avenue to obtain a dual speed focuser.

  First I have read many forum members who were replacing even the Skywatcher provided dual speed focuser because of the lack of machined tolerances, causing a shift in focuser axis with vertical movement of the drawtube.  This was not my case.  The single speed Crayford focuser on my dobsonian was smooth and had absolutely no drawtube shift.  I just felt the need for finer focuser ajustment.

  I found, it may have been on this forum, a upgrade kit for my focuser.  The catch was it was not avalible in the U.S. but from an astronomy vender in Great Britain -  https://www.365astronomy.com.    

  The unit I purchased is a Lacerta Dual Speed 1:10 Microfocus Upgrade Kit. It is designed for Skywatcher Newtonian telescopes with Crayford style focusers 8" and larger.  They accept major credit cards and Paypal.  I purchased mine through Paypal.  At the current exchange rate dollars to pounds I paid $95 including shipping.  I order the unit on a Friday and it arrived the following Thursday.  Tracking was provided when it shipped via Royal Mail/ USPS.

  I my view it is a quality item which preforms flawlessly. Very smooth and precise control.  It caused no change in my scopes collimation and took about 10 minutes to install.  For me it was a no brainer $400 for a replacement focuser or modify my fully functional single speed Crayford for $95.

Attached Thumbnails

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Edited by elrod, 07 September 2018 - 07:56 PM.

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#2 petert913

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Posted 07 September 2018 - 09:18 PM

Well Done !  Nice looking unit.  I wish my Newt was a Skywatcher  smile.gif


Edited by petert913, 07 September 2018 - 09:18 PM.


#3 Jond105

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Posted 07 September 2018 - 09:27 PM

Oh my god, I've been posting on my topic of my first light with my 10" Skywatcher collapsible. So they do deliver to US? If so I'm getting mine ordered tonight. That seems like an awesome and easy upgrade

#4 outofsight

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Posted 07 September 2018 - 09:42 PM

Yeah, they deliver to the US, mine cost a little less than a $100 delivered, but it works extremely well and it's very easy to install and a lot easier than trying to figure out what other focuser might fit. It's a solid piece of work, well worth it.

 

I wrote about it in a couple other threads, like this one, but it might have been below where you read to.

 

https://www.cloudyni...er#entry8732715


Edited by outofsight, 07 September 2018 - 09:45 PM.

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#5 Jond105

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Posted 07 September 2018 - 09:53 PM

This just made my night.
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#6 Adun

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Posted 07 September 2018 - 10:15 PM

That unit looks very very nice.

 

For one third the cost, there's also this alternative, which besides Skywatcher dobs also works on Celestron Omni XLT 150 and Meade LX70 R6/R8 newtonians:

 

2" to 1.25" adapter with helical fine focusing and brass ring.
 
It's a non rotating helical fine focusing adapter that replaces the 2"-to-1.25" adapter that comes with the scope. With it, I get all the fine focus I want for high power, and feel zero need of upgrading the focuser.

 


Edited by Adun, 07 September 2018 - 10:23 PM.


#7 outofsight

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Posted 08 September 2018 - 03:52 AM

I don't know if that, the helical focuser, can handle 2" or not, just in case anyone is interested in any 2" stuff.


Edited by outofsight, 08 September 2018 - 01:34 PM.


#8 junomike

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Posted 08 September 2018 - 07:53 AM

$95 is a reasonable amount for an upgrade like this. 

I'd need to add the Scopestuff compression ring also, so for me the Linear Bearing GSO Focuser is within reach.

Great options are always nice to find!  Well done!



#9 BGeoghegan

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Posted 09 September 2018 - 07:24 PM

To broaden the topic a little... There's another single speed to dual speed upgrade kit from GSO:

 

https://agenaastro.c...grade-kit.html 

 

The reviews show a variety of scopes that this kit fits. I have one installed on my Celestron Onyx 80mm ED.  A worthy upgrade.


Edited by BGeoghegan, 09 September 2018 - 08:12 PM.


#10 outofsight

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Posted 09 September 2018 - 09:52 PM

Not the same thing, but still good to know, and your link doesn't work. (It doesn't make sense that your link doesn't work, but what else is new, it's a computer thing.)

 

Try this link.

 

https://agenaastro.c...pgrade-kit.html


Edited by outofsight, 09 September 2018 - 09:55 PM.

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#11 Miranda2525

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Posted 09 September 2018 - 11:34 PM

I've personally never found any use in the dual speed. Even when I had one, I always used the single speed as I found I like to snap into focus faster. Not a fan of compression rings either. The screws don't mar up the barrels of my eyepieces because I only snug them just enough, plus I use twist lock adapters on all of my 1.25" EP's. I have extenders on my one 2" EP. 

 

YMMV, so they say!  


Edited by Miranda2525, 09 September 2018 - 11:35 PM.


#12 SloMoe

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Posted 11 September 2018 - 08:15 AM

The GSO upgrade won't fit the SW Crayford's, due to the gear box shape.


Edited by Mike W., 11 September 2018 - 07:33 PM.


#13 Quartz

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Posted 11 September 2018 - 11:57 AM

Thanks for this. I just ordered mine and should be here and ready to install before my Skywatcher gets here!



#14 BGeoghegan

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Posted 11 September 2018 - 06:40 PM

Not the same thing, but still good to know, and your link doesn't work. (It doesn't make sense that your link doesn't work, but what else is new, it's a computer thing.)

 

Try this link.

 

https://agenaastro.c...pgrade-kit.html

Thanks for correcting the link - I should have checked for trailing spaces.



#15 robodan

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Posted 21 September 2018 - 07:44 PM

I just got this, gives far more presise focusing, also you can even control your focus through PC with the right cable.

https://www.telescop...ocuser/7395.uts

Edited by robodan, 21 September 2018 - 07:55 PM.



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