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Stellarvue AT 1010 Pre Nighthawk Focuser question

refractor
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#1 dcollier

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Posted 04 February 2020 - 08:25 AM

I picked up a Pre Nighthawk AT 1010 used.  From what I can tell this sees to be a excellent scope for an achromat.  Nice sharp stars.  The issue I am having with it is the the the Draw tube is sloppy in the focuser and it will slip at higher angles with 2" accessories installed.   It is the stock R&P single speed focuser with rubber nobs.  Is there a way to tighten things up and stop the slip.  There is no lock on the focuser.  Or should I consider upgrading the focuser to a GSO Crayford? I read somewhere there was some variance in the tube diameters used over the years so that give some concern over getting right GSO focuser?  Comments, Recomendations? 

 

Thanks

 

                      -Dave 



#2 bigdob24

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Posted 09 February 2020 - 07:05 PM

I’ve got one and had trouble with the original focuser, I tried to rebuild it , even sent it in and had them rebuild it and ended up getting a GSO.

Seems the tolerances are very loose .

With the GSO I could hold a Denk Bino and a Quark , that’s the limit but it would hold for viewing.

BD



#3 G-Tower

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Posted 09 February 2020 - 07:10 PM

get a new focuser, that scope is worth it



#4 dcollier

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Posted 12 February 2020 - 08:05 AM

I know that's why I snapped it up...   Any collimation issues when installing the New focuser?? 

 

             -Dave 



#5 G-Tower

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Posted 12 February 2020 - 08:25 AM

Possibly. You need to check it to determine if so. Precise collimation is important for optimum performance, specially in fast short tubes




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