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Chinese 60mm 1.25 solution

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#1 squirrels

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Posted 04 August 2019 - 09:58 AM

Hey all! First post in a long while, but thought this was worth sharing. I ordered a 60mm crayford 1.25 from aliexpress yesterday and it should arrive at the end of the month.

 

It's a total gamble, but I really haven't enjoyed the .965 eyepieces for my Bushnell Sky Chief refractor.

 

Here's a link to what I'm trying. I'll update this after It arrives and I'm able to install it.


Edited by squirrels, 04 August 2019 - 09:59 AM.

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#2 Vesper818

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Posted 04 August 2019 - 11:31 AM

Well that's just cool!
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#3 Kokatha man

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Posted 04 August 2019 - 07:38 PM

...a site for folks who forgot their glasses..?!?

 

I had to check the settings of my screenbrowser - the first image opened up at size "HUGE" but could be clicked on to bring it down to a sane size...but alas I then couldn't scroll...to scroll down I had to go back to the overblown image & the rest of the images were all ginormous - can't say that they didn't provide you with enough perspectives of that focuser though..!!! :rofl: 



#4 roscoe

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Posted 05 August 2019 - 07:12 PM

Cool!!  It looks like it rotates, too, a feature I like for scopes on equatorial mounts.  I, too, will be awaiting your report!



#5 squirrels

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Posted 14 August 2019 - 08:32 PM

So, the focuser arrived today! 10 days from China isn't too bad!

Initial thoughts:
A well made focuser with smooth action. The rotating focuser is a nice touch. Fits into the 60mm sky chief pretty well. A definite upgrade. The mounting holes are almost where the original focuser holes are.

So the question is, should I drill new holes or slightly file out the current holes?
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#6 agmoonsolns

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Posted 14 August 2019 - 08:35 PM

Depends on how far they're off. If really close, just extend the old holes a bit.



#7 squirrels

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Posted 14 August 2019 - 09:14 PM

They're mostly visible, on the edge of the old holes with maybe 2mm not showing.

#8 CharlieB

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Posted 14 August 2019 - 10:01 PM

Depends on how far they're off. If really close, just extend the old holes a bit.

That's what I'd do.  It also facilitates getting the focuser aligned with the optical axis.



#9 agmoonsolns

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Posted 14 August 2019 - 10:46 PM

I would just expand the holes already there, no sense putting more holes in it than necessary.



#10 BFaucett

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Posted 15 August 2019 - 02:48 AM

...a site for folks who forgot their glasses..?!?

 

I had to check the settings of my screenbrowser - the first image opened up at size "HUGE" but could be clicked on to bring it down to a sane size...but alas I then couldn't scroll...to scroll down I had to go back to the overblown image & the rest of the images were all ginormous - can't say that they didn't provide you with enough perspectives of that focuser though..!!! rofl2.gif

 

 

Try the non-mobile link:

 

https://www.aliexpre...Eg1564826688271

 

Bob F. smile.gif


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#11 Bomber Bob

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Posted 15 August 2019 - 05:00 AM

So, the focuser arrived today! 10 days from China isn't too bad!

Initial thoughts:
A well made focuser with smooth action. The rotating focuser is a nice touch. Fits into the 60mm sky chief pretty well. A definite upgrade. The mounting holes are almost where the original focuser holes are.

So the question is, should I drill new holes or slightly file out the current holes?

I'm assuming the original screws are chrome Phillip's-head...  I'd enlarge the original holes as needed, then get some chrome washers from M-C, bend them to fit the tube, and make the change look more like OEM.  That would cover the larger holes, too.


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#12 squirrels

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Posted 15 August 2019 - 08:07 PM

Slightly extending the holes worked! We'll see how first light is. The neighbors mailbox looks pretty good!



#13 squirrels

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Posted 15 August 2019 - 08:08 PM

Here's a close up.

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#14 squirrels

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Posted 15 August 2019 - 08:09 PM

Doesn't look weird on the scope either!

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#15 squirrels

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Posted 15 August 2019 - 09:25 PM

Okay, so my take.

This focuser is a giant leap forward when compared to the stock R&P. Being able to use some 1.25 plossl made the experience nicer.

The action of the focuser is smoother than I had expected. Almost zero shifting when adjusting focus.

For my scope it has more than enough back focus and just the right amount of in focus for what I tried. I went up to 82x power and had about a half centimeter of in focus left. Jupiter and Saturn both looked nice and better than the pinhole .965 eyepieces.

Pointing up at Vega, I didn't notice any slip. The nylon lock nut did its job. The rotating focuser worked fine as well.

Big win for me at a reasonable cost. This is an improvement my dad would have liked on his old scope.
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