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Buying a Zhumell Z10 for 150

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#1 Astrogamer

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Posted 09 February 2018 - 10:41 PM

Found one on FB Market for 150, guy says the mirrors are in great condition, that he's never really gotten to use it. I imagine that it's that noob mistake that a lot of people do. I'm 99% certain that this is a good deal, but HOW good of a deal is it? And is there any damage I should be worried about aside from the mirrors?



#2 dgoldb

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Posted 09 February 2018 - 11:09 PM

For the price, you can't go too wrong.  Pretty good deal I'd say.  Not so unheard of that I'd be skeptical - although I'd make sure and at least look through the scope with an eyepiece (even during the day) to make sure things will focus reasonably well and the motions don't stick too much.  


Edited by dgoldb, 09 February 2018 - 11:09 PM.


#3 aeajr

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Posted 09 February 2018 - 11:15 PM

Buy it quickly


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#4 rowdy388

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Posted 09 February 2018 - 11:16 PM

It is a great deal. As with any purchase, look at it with a critical eye. If possible

bring an experienced amateur with you. The base is made of particle boar. I've heard 

of it being damaged going through doorways when the eyepiece tray breaks off

if it gets clipped. I have a Z12 and Z8, both several years old and still in great

condition. 



#5 Astrogamer

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Posted 09 February 2018 - 11:26 PM

I'm also going to see if he's still interested in astronomy, if he'll do a trade for my awb



#6 Spockk

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Posted 09 February 2018 - 11:29 PM

I’d suggest possibly inspecting the primary mirror by shining a bright light through the back of the mirror. I think the zhummel OTA has a exposed bottom? Anyway I think it could allow for you to look for any breaks or scratches. $150 is a great deal I think even if the mirror was scratched. I also think maybe look at the focuser and see if it looks like it was bumped bad. I’ve heard of people accidentally hitting a focuser badly while transporting, and possibly damaging the upper OTA, or bumping the focuser so badly that it’s axis is far out of alignment.
Just my 2 cents. I think it’s pretty sound advice when inspecting a used scope

#7 Astrogamer

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Posted 09 February 2018 - 11:48 PM

He took a picture with a light flashing into the tube, and it looked good. But I will check that too. I'm trading my AWB Onesky and 100 bucks for it! I JUST bought a CG5 for my AWB Onesky, to get into astrophotography, like 2 days ago, and now vaguely regretting that, but I'll get a better ota for it sooner or later, anyway. 


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#8 Astrogamer

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Posted 10 February 2018 - 06:27 AM

So, from what I'm reading, the weight of the ota is about 28lbs? Would the CG5 be able to handle that?

#9 Bjorg63

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Posted 10 February 2018 - 07:29 AM

The Z10 is a dobsonian mounted reflector telescope. I wouldn't mount it on the CG5 and I wouldn't use it for astrophotography. It's primarily a visual observing telescope. You can mount a camera to the Z10, but there are better telescopes for astrophotography. 



#10 Astrogamer

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Posted 10 February 2018 - 09:16 AM

Yeah, I know. That wasn't fully an intention, just wondering if it was a possibility.  Not gonna lie, when I made this comment earlier, for some reason I was thinking that it had a dovetail (guess I was comparing it to my OneSky, in my head). Though, duh, it's a forked mount. And I'm sure the motor on the CG-5 wouldn't be strong enough, but it might be possible manually. Idk, just thought it would be cool. Lol.

I also did see that there's a motor kit for the Zhumell Z10? But this will be used as just an observing telescope. I can't wait to see how much more powerful it is than the AWB Onesky. I'll probably end up getting a C6 or a C8 OTA for the CG5, sooner or later, or something else if anyone has any recommendations. 
Any recommendations for accessories for the Z10? I saw carrying straps for about 30 bucks.


Edited by Astrogamer, 10 February 2018 - 09:30 AM.


#11 SteveG

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Posted 10 February 2018 - 02:25 PM

No way will you be able to use that 10" steel-tube reflector on a CG5.

 

For the dob, I recommend a 2", high-quality low power eyepiece, between 22 and 34 mm. This will give you some nice wide-field views. You might later consider a used Paracorr coma corrector. Do you have an adjustable height observing chair?


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#12 vtornado

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Posted 10 February 2018 - 04:29 PM

Hello and welcome to the forum.

 

$150 is a great price.  Used around me these go for about $350.  

Besides the mirrors, check the focuser to make sure it racks in and out smoothly.

Check the telescope axis in both up/down (altitude) and round and round.  (azimuth).

 

If there are axis problems they can probably be fixed easily with hand tools, especially the azimuth.

If the focuser is damaged it might cost you $100.00 to buy a replacement.

 

Another expense is a finder.  Does it have one? 


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#13 Astrogamer

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Posted 10 February 2018 - 05:21 PM

Yep. Comes with stock.

#14 Bjorg63

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Posted 10 February 2018 - 05:32 PM

The 10" scope will give great views, improved views, deeper views. It's worth getting quality eyepieces.

 

You can motorize the scope for tracking. I often use my XT10i as push to, it's not motorized, but it has a hand controller with good data base. Tracking is nice but not required IMHO.



#15 kfiscus

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Posted 10 February 2018 - 05:32 PM

This is a very good find. The light grasp and heft differences of the 10" over the 5" are considerable (and worth the effort).

#16 Cyberpunk

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Posted 10 February 2018 - 06:41 PM

A totally sic deal.  I recently got an Orion XT8 off Craig's for 150 bones.  Great shape just needed cleaning and new tef pads. 


Edited by Cyberpunk, 10 February 2018 - 06:43 PM.


#17 Astrogamer

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Posted 11 February 2018 - 06:19 PM

https://imgur.com/gallery/0xeFC

Finderscope was a bit loose. Hand tightened it, though I need to do a little more. I've wiped the base down with 409 6 times, and it's still dusty. Focuser feels sooooo smooth to me. I love the precision knob on that too. And what power tip is needed for the fan? Is the fan for dew?

Edited by Astrogamer, 11 February 2018 - 06:20 PM.


#18 Astrogamer

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Posted 11 February 2018 - 06:23 PM

I'm also so glad this came with the 2"-1.25" adapter!

#19 Redbetter

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Posted 11 February 2018 - 06:35 PM

There should be a battery holder with male plug to insert into the female connection on the bottom of the scope near the fan.  The fan is for cooling the scope.  Warm mirror and cool night air = poor images.



#20 M57Guy

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Posted 11 February 2018 - 06:36 PM

The fan is to help speed cooling of the primary mirror.

 

My friend has a Z10 I openly admire. Its a fun scope and I'm glad every time he brings it. 

 

$150 sounds like a steal. I hope you got it.



#21 Astrogamer

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Posted 11 February 2018 - 07:02 PM

Nope, guess it didn't come with the power supply. Honestly, the person that sold it to me probably didn't even realize it had a fan on it. I traded him my AWB Onesky (that I was going to put on the CG5 I got a few days ago) and 100 bucks for it, btw. So, I spent a little more than 150, but I was able to keep this dude in astronomy, to a degree.



#22 kfiscus

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Posted 11 February 2018 - 07:14 PM

The fan plug is for 12-volt. The center is positive.

#23 Astrogamer

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Posted 11 February 2018 - 07:43 PM

I know it's a 12v, it's just a computer fan. I imagine the CG-5 AT motor power supply will work, unless its plug has a different diameter. What's a good operational temperature? I assume you wouldn't wanna just turn it on when it's 20 degrees out, that might cause shock to the mirror.



#24 Astrogamer

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Posted 11 February 2018 - 08:27 PM

Looking through the manual online, now. I just noticed this telescope is missing the silver side bearings. Though, they don't seem to be too important. But, is there anywhere I can get them?



#25 kfiscus

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Posted 11 February 2018 - 08:27 PM

The purpose of the fan is to get the mirror near the air temp. Many people run their fans full time while observing.


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