Author Topic: Zhumell 8 or 10 dob  (Read 344 times)

pernogori

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Re: Zhumell 8 or 10 dob
« Reply #15 on: January 25, 2018, 02:03:17 PM »
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The Z8 is 54 pounds.

The Z10 is 60 pounds.

You would carry them in two pieces, so it's a slight difference between the two scopes.

Difference in length is about 5cm


That's what telescopes.com says but it's incorrect, which is odd they don't have their own facts straight. The Z8 is 52 lbs and the Z10 is 66 lbs. It's not a huge amount, but between the lighter weight and smaller circumference of the OTA and base, I just found the 8" to be noticeably less awkward to move around my house. It's darn near grab and go, which I love.

James Schaefer

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Re: Zhumell 8 or 10 dob
« Reply #16 on: January 25, 2018, 11:54:52 PM »
When I purchased my dob I Chose my 8" over an available because of weight, and it happened to be Z10.

Nothing sad 66 pounds is a problem but one needs to be aware before making a decision lest you be unpleasantly surprised. And, they do make carts for these things.

clicpostreta

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Re: Zhumell 8 or 10 dob
« Reply #17 on: January 30, 2018, 01:26:27 AM »
Quote
Quote

The Z8 is 54 pounds.

The Z10 is 60 pounds.

You would carry them in two pieces, so it's a slight difference between the two scopes.

Difference in length is about 5cm


That's what telescopes.com says but it's incorrect, which is odd they don't have their own facts straight. The Z8 is 52 lbs and the Z10 is 66 lbs. It's not a huge amount, but between the lighter weight and smaller circumference of the OTA and base, I just found the 8" to be noticeably less awkward to move around my house. It's darn near grab and go, which I love.

It is true that the 8 inch is slightly more manageable than the 10 inch. But the way I figure it, Greg is planning on building a scope around his 17.5 inch Coulter mirror so clearly either the 8 inch or the 10 inch will be no problem for Greg. Easier collimation and easier on eyepieces, an F/6 scope is slightly easier to collimate, it is somewhat easier on eyepieces. But again, in the context of this thread, the 17.5 inch F/4.5 Coulter is there waiting. It will require the good eyepieces and the good collimation skills.. Might as well get a start..

My own experience: I have owned my 10 inch GSO Dob since about 2003. It is never been my largest or "best" scope but it has been a very good scope and a very good performer. The size in right, a bit heavier than an XT-8 but very nearly the same length, for portability, thats the important thing.

At the time I bought it, I had an XT-8... And over the past 13 years, I several 8 inch Dobs have come and gone.. the ones I remember, a Discovery, a couple of Celestron Starhoppers, a nice custom made scope with a Parks mirror, Protostar secondary and nice components..All these were good scopes but I could never find a reason to use an 8 inch F/6 when I had a 10 inch F/5 right there and waiting.. Each one eventually found a new home.

In my mind, the 10 inch F/5 is a scope I will keep the rest of my life, it's just a sweet spot, the biggest tube Dob that is easily managed. In Greg's situation, having a nice 10 inch, that would be very useful in the term.. At least that is how it works for me.

Jon

frenafverbi

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Re: Zhumell 8 or 10 dob
« Reply #18 on: January 31, 2018, 01:43:13 AM »
Scopes are like boats. No matter how big you go, you always wish it was bigger.

cieledrore

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Re: Zhumell 8 or 10 dob
« Reply #19 on: January 31, 2018, 01:47:10 AM »
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Scopes are like boats. No matter how big you go, you always wish it was bigger.


I am not sure about that.. I am OK with what I have..

Jon


Eric Hayes

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Re: Zhumell 8 or 10 dob
« Reply #20 on: January 31, 2018, 10:56:30 AM »
I'd go with the 8" and put the savings towards building the 17" . I'm concerned your EPs might not handle the 10"'s speed and upgrading them would take away funds from the 17".

erbarmauhump

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Re: Zhumell 8 or 10 dob
« Reply #21 on: February 08, 2018, 10:39:59 PM »
He will need well corrected eyepieces for the 17 f4.5.....and the same eyepieces will work just as well in the f4.7-f5 dob. What works well at f6 may not work as well at f4.5