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Equipment Discussions >> Reflectors

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osbourne one-nil
scholastic sledgehammer


Reged: 07/03/06

Loc: Cumbria, England 54.5ºN 2.5º...
Convince me on an 8" portaball
      #6484968 - 04/24/14 06:08 AM

I've always lusted after a Portaball, and now one is available in the UK. The scope is from around 1999 but the Zambuto mirror is only 8 months old. I'm seriously tempted, but just have a few nagging doubts.

I currently have a TV85 on a Porta II, which I love! I also recently purchased a C6 SCT, which isn't really doing a lot for me. I think I like the views through the TV85 too much and the C6 just doesn't compare.

I do have a 10" Sumerian Optics travel dob too, but to be honest, I'm too lazy to assemble it and, generally, clear nights are so fleeting here that you often only get an hour or so.

The Portaball, therefore, would give me 8" of, hopefully, APO-like aperture, in a lightweight and relatively transportable unit; at least enough to drive into the Lake District, park up and carry it 100yds into a field.

Or should I spend the same amount on a 120ED such as the Skywatcher? I think the Portaball's mirror should be good enough to satisfy my cravings?


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csrlice12
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Reged: 05/22/12

Loc: Denver, CO
Re: Convince me on an 8" portaball new [Re: osbourne one-nil]
      #6485098 - 04/24/14 08:37 AM

If the price is right, buy it.....convinced yet???

Gene should be along shortly, he's the local portaball expert, but these are fantastic scopes as long as the mirrors are in good shape (you indicate they are) and the mechanics still work, these are lifetime scopes.


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osbourne one-nil
scholastic sledgehammer


Reged: 07/03/06

Loc: Cumbria, England 54.5ºN 2.5º...
Re: Convince me on an 8" portaball new [Re: csrlice12]
      #6485117 - 04/24/14 08:50 AM

Well, I guess something is worth what someone else is prepared to pay for it, so happy with that.

I do like the idea of having two life-time telescopes and with my TV85, I'm halfway there.


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Pinbout
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Reged: 02/22/10

Loc: nj
Re: Convince me on an 8" portaball new [Re: osbourne one-nil]
      #6485121 - 04/24/14 08:52 AM

the CZ mirror will kick the but of the Orion Optics in the sumerain...literally mop the floor with it.

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osbourne one-nil
scholastic sledgehammer


Reged: 07/03/06

Loc: Cumbria, England 54.5ºN 2.5º...
Re: Convince me on an 8" portaball new [Re: Pinbout]
      #6485153 - 04/24/14 09:12 AM

I thought the Orion Optics (UK) were considered pretty good? If I'm going to get better than that then I'll be happy. Well, for me anyway, I don't really do happy....just a bit less grumpy.

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nicknacknock
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Reged: 02/20/12

Loc: In a galaxy far far away...
Re: Convince me on an 8" portaball new [Re: Pinbout]
      #6485292 - 04/24/14 10:32 AM

Quote:

the CZ mirror will kick the but of the Orion Optics in the sumerain...literally mop the floor with it.




Because it was decreed by whom? Orion Optics makes excellent mirrors. Please refrain from debasing a manufacturer like that. Do you have personal experience with Orion Optics mirrors? Because I do and they simply rock my astronomy world...


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CosmoSat
Pooh-Bah


Reged: 07/24/09

Loc: India
Re: Convince me on an 8" portaball new [Re: osbourne one-nil]
      #6485387 - 04/24/14 11:36 AM

Quote:

I do have a 10" Sumerian Optics travel dob too, but to be honest, I'm too lazy to assemble it and, generally, clear nights are so fleeting here that you often only get an hour or so.





So what will motivate u to lug out the portaball, which is also a truss design? almost the same effort to set up either of them. A solid tube dob would be more suited for ur condition. Just a thought..

Clear Skies!


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hoes
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Reged: 02/02/12

Loc: Boston MA
Re: Convince me on an 8" portaball new [Re: osbourne one-nil]
      #6485546 - 04/24/14 12:49 PM

Others have said on this site that to get the most of a Zambuto you are probably going to need a paracorr - is the model you are thinking of able to handle that weight? Having said that I just purchased a used 10 inch portaball- and love everything about it - I get a smile on my face every time I get it out - not sure I can explain why. I am about to purchase a paracorr and will figure out how to make it work. I don't have a sumarian optics dob but Its hard for me to see how setting up a portaball would be easier. Good luck with your decision.

Steve


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schang
scholastic sledgehammer


Reged: 04/24/13

Loc: columbia, sc
Re: Convince me on an 8" portaball new [Re: osbourne one-nil]
      #6485626 - 04/24/14 01:35 PM

Quote:


I currently have a TV85 on a Porta II, which I love! I also recently purchased a C6 SCT, which isn't really doing a lot for me. I think I like the views through the TV85 too much and the C6 just doesn't compare.

I do have a 10" Sumerian Optics travel dob too, but to be honest, I'm too lazy to assemble it and, generally, clear nights are so fleeting here that you often only get an hour or so.

The Portaball, therefore, would give me 8" of, hopefully, APO-like aperture, in a lightweight and relatively transportable unit; at least enough to drive into the Lake District, park up and carry it 100yds into a field.

Or should I spend the same amount on a 120ED such as the Skywatcher? I think the Portaball's mirror should be good enough to satisfy my cravings?



I wonder if your craving is for the ownership of a Portaball/Zambuto mirror, or for the image it brings? If the C6 and the 10" Orion dob (both are fine instrument) won't motivate you to take them out, what will motivate you to bring out the Skywatcher 120 ED refractor, which is just as much hassle as the dob?


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osbourne one-nil
scholastic sledgehammer


Reged: 07/03/06

Loc: Cumbria, England 54.5ºN 2.5º...
Re: Convince me on an 8" portaball new [Re: schang]
      #6485706 - 04/24/14 02:08 PM

Some fair points, and ok...I just really want a Portaball!

In terms of motivation for setting it up, I believe from what I've read that the Portaball is quite a robust instrument and the only assembly I envisage doing it lowering the tube assembly onto the base; I'll probably keep it permanently assembled. The Sumerian Optics is quite delicate to my mind and I wouldn't want to carry it too far assembled, or drive around the twisty bumpy roads we have round here without it being packed away.

Perhaps motivation is the wrong word...opportunity probably describes it better. Clear skies are so rare that I like catching ever clear spell I can.

I suspect I'll end up with all my scopes - I would find it very hard to part with the Sumerian - and be plain greedy!


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Pinbout
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Reged: 02/22/10

Loc: nj
Re: Convince me on an 8" portaball new [Re: nicknacknock]
      #6485724 - 04/24/14 02:16 PM

Quote:



Quote:
--------------------------------------------------------------------------------

the CZ mirror will kick the but of the Orion Optics in the sumerain...literally mop the floor with it.


--------------------------------------------------------------------------------



Because it was decreed by whom? Orion Optics makes excellent mirrors. Please refrain from debasing a manufacturer like that.




saying CZ is much better than OO is debasing them? lighten up. I've seen some pretty hideous examples from OO. I haven't seen any from CZ.


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nicknacknock
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Reged: 02/20/12

Loc: In a galaxy far far away...
Re: Convince me on an 8" portaball new [Re: Pinbout]
      #6485728 - 04/24/14 02:18 PM

Quote:

Quote:



Quote:
--------------------------------------------------------------------------------

the CZ mirror will kick the but of the Orion Optics in the sumerain...literally mop the floor with it.


--------------------------------------------------------------------------------



Because it was decreed by whom? Orion Optics makes excellent mirrors. Please refrain from debasing a manufacturer like that.




saying CZ is much better than OO is debasing them? lighten up. I've seen some pretty hideous examples from OO. I haven't seen any from CZ.




Kick the butt and mop the floor probably fits the bill for debasing.....


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tomcody
Carpal Tunnel
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Reged: 07/06/08

Loc: Titusville, Florida
Re: Convince me on an 8" portaball new [Re: osbourne one-nil]
      #6485849 - 04/24/14 03:15 PM

These are fairly rare, if the condition and price are good and you want one? buy it, life is short.
Rex


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Pinbout
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Reged: 02/22/10

Loc: nj
Re: Convince me on an 8" portaball new [Re: nicknacknock]
      #6485865 - 04/24/14 03:25 PM

Quote:


Kick the butt and mop the floor probably fits the bill for debasing.....






say what you will, I'll stick by my statement. on a CZ you can mag x100 per aperature inch if you have good seeing.


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osbourne one-nil
scholastic sledgehammer


Reged: 07/03/06

Loc: Cumbria, England 54.5ºN 2.5º...
Re: Convince me on an 8" portaball new [Re: Pinbout]
      #6485902 - 04/24/14 03:43 PM

Quote:

if you have good seeing.


Ah well.

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JMW
Pooh-Bah


Reged: 02/11/07

Loc: Nevada
Re: Convince me on an 8" portaball new [Re: osbourne one-nil]
      #6485935 - 04/24/14 04:03 PM

The only negative on a Portaball is the difficulty of using encoder technologies for digital setting circles. You could always bring a tiny grab and go refractor on a alt/az mount with encoders and put a Telrad on each. Then you just match up the Telrad locations when you need help. If you can find everything you want to see with a Telrad than you are all set. I have only seen a 12 inch Portaball and the views looked nice and the movement of the scope worked well. It's a nice sit down scope.

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osbourne one-nil
scholastic sledgehammer


Reged: 07/03/06

Loc: Cumbria, England 54.5ºN 2.5º...
Re: Convince me on an 8" portaball new [Re: JMW]
      #6486009 - 04/24/14 04:37 PM

Sounds like my TV85 porta-mounted Argo Navis-aided scope would be a good match!

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orion61

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Reged: 10/20/07

Loc: Birthplace James T Kirk
Re: Convince me on an 8" portaball new [Re: osbourne one-nil]
      #6486066 - 04/24/14 05:00 PM

A lot of people find it hard to replace the visual quality of an on-obstructed tube. You kind of sound like that.
I also wonder if your skies are causing some of your problems?
I have a C6 and find it to have very good optics, it is still blown away by my Synta 6" F8 Refractor. The coma from a Schmidt and Dob are probably putting you off.
I'd try and find an Astronomy Club and see if someone has a scope of similar size and quality! That is a pretty shilling you are going to invest..
Do yourself and don't let us make up your mind.
Just like a Pretty Girl.. only you know which one is for you..
Good luck.


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stratocaster
sage
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Reged: 10/27/11

Re: Convince me on an 8" portaball new [Re: osbourne one-nil]
      #6486155 - 04/24/14 05:43 PM

If you feel you're too lazy to set up the 10" dob, then I don't see why a portaball would change your mind about the hassle of assembly.

When you say the C6 isn't doing anything for you vs the TV85 I wonder what may be going on there. What are your viewing habits? Do you like to look at faint fuzzies or do you prefer lunar, planetary, stellar observing? I'm assuming the latter since the TV85 wouldn't be strong in the faint fuzzy category. Otherwise a C6 should be at least comparable to the TV85 - assuming proper setup and cooldown of the scope.

Now, would an 8" Zambuto on any platform provide better resolution and brighter images when set up properly. Absolutely. Would it ever see the dark of night due to the setup factor? That's the big question.

But if you've always had a hankering for a portaball I'm wondering how you're reconciling the hassle factor with your portaball lust. Seems like the two would be mutually exclusive.

And the 120ED sounds like the biggest hassle of all of them. You'd need a pretty robust mount - even if you went alt-az. And if you go GEM then you've got to REALLY want to use the scope to drag it out and set it up.

Personally I'd go with the portaball in a second assuming it's in good condition and the price is reasonable.


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osbourne one-nil
scholastic sledgehammer


Reged: 07/03/06

Loc: Cumbria, England 54.5ºN 2.5º...
Re: Convince me on an 8" portaball new [Re: stratocaster]
      #6486210 - 04/24/14 06:05 PM

Well, I'm definitely more of a faint fuzzies kind of guy but I got the C6 mostly for a bit more aperture combined with that long focal length, to make the most of planets. I've just been finding that my TV85 shows me more detail, although that could just be because of poor skies or cool-down issues. The hassle bit is nothing to do with not having the energy to go out with a 10" scope but purely about assembling and de-assembling something when the skies are clear so briefly. I see the portaball as a grab and go dob?

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osbourne one-nil
scholastic sledgehammer


Reged: 07/03/06

Loc: Cumbria, England 54.5ºN 2.5º...
Re: Convince me on an 8" portaball new [Re: tomcody]
      #6486215 - 04/24/14 06:07 PM

Quote:

These are fairly rare, if the condition and price are good and you want one? buy it, life is short.
Rex


My life will be very short if my wife found out how much it is!

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Pinbout
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Reged: 02/22/10

Loc: nj
Re: Convince me on an 8" portaball new [Re: osbourne one-nil]
      #6486368 - 04/24/14 07:20 PM

Quote:

Ah well.





well the thing is, the atmosphere doesn't equalize the differences in wavefront ratings of an optical train.

the atmosphere will effect an lesser ~rating system more than a higher ~rating system.

so a CZ primary with a matching secondary will be able to cut thru the sky better than a lesser system.


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tomcody
Carpal Tunnel
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Reged: 07/06/08

Loc: Titusville, Florida
Re: Convince me on an 8" portaball new [Re: osbourne one-nil]
      #6486369 - 04/24/14 07:20 PM

Ask yourself:
How many of these have you seen come up for sale?


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stratocaster
sage
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Reged: 10/27/11

Re: Convince me on an 8" portaball new [Re: osbourne one-nil]
      #6486453 - 04/24/14 08:15 PM

Quote:

Well, I'm definitely more of a faint fuzzies kind of guy but I got the C6 mostly for a bit more aperture combined with that long focal length, to make the most of planets. I've just been finding that my TV85 shows me more detail, although that could just be because of poor skies or cool-down issues. The hassle bit is nothing to do with not having the energy to go out with a 10" scope but purely about assembling and de-assembling something when the skies are clear so briefly. I see the portaball as a grab and go dob?




If you were to assemble the portaball and keep it assembled for grab n go, then death by wife notwithstanding (and this is a very serious consideration) - and assuming you can afford it - you have to go for it.

You'll get better dark sky performance out of it than either of your existing scopes. And probably excellent planetary views as well, as I'm assuming this is at least an f7 scope with a small central obstruction. Performance would probably be akin to something like a 6" refractor.


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nevy
professor emeritus
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Reged: 02/07/12

Loc: UK
Re: Convince me on an 8" portaball new [Re: stratocaster]
      #6486459 - 04/24/14 08:17 PM

I'd get it if I didn't have what I've got.

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GeneT
Ely Kid
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Reged: 11/07/08

Loc: South Texas
Re: Convince me on an 8" portaball new [Re: osbourne one-nil]
      #6486464 - 04/24/14 08:18 PM

As a visual only telescope, the Portaball is all around excellent telescope. Its optics are the best, and it is easy to set up, and fun to use. You twist the finder to find the object and in the same movement place the eyepiece exactly where you want it. I have owned a 20 and 18 inch Obsession, a C8 and numerous other telescopes. I sold them all. The 12.5 inch Portaball is my life keeper.

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rdrane
member


Reged: 09/18/07

Re: Convince me on an 8" portaball new [Re: osbourne one-nil]
      #6486776 - 04/24/14 10:50 PM

If you have the patience for old fashioned star hopping using a Rigel finder, I would get it. I have the 12.5 and would buy the 8 if I only had the funds. What may cloud your case is you have a 10. But if you are looking to travel, there's no question about getting the 8 over the refractor. For me, even the larger 12.5 is still much more travel friendly than packing a high quality APO with complete mount set-up.

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osbourne one-nil
scholastic sledgehammer


Reged: 07/03/06

Loc: Cumbria, England 54.5ºN 2.5º...
Re: Convince me on an 8" portaball new [Re: Pinbout]
      #6487031 - 04/25/14 02:30 AM

Quote:

well the thing is, the atmosphere doesn't equalize the differences in wavefront ratings of an optical train.

the atmosphere will effect an lesser ~rating system more than a higher ~rating system.

so a CZ primary with a matching secondary will be able to cut thru the sky better than a lesser system.


For some reason, even though that seems completely logical, I've never thought of it like that before. Good point.

As for how often do these come up.....first time I've ever seen one for sale I think and old-fashioned star hopping; love it. I have an ZEQ25 and really only use it for its tracking ability rather than its ability to find stuff. I

Anyway, did the deal last night, and will get hold of it in a couple of weeks when the vendor passes close by on the way to Scotland. Can't wait!


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planet earth
Carpal Tunnel
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Reged: 09/07/10

Loc: Ontario Canada
Re: Convince me on an 8" portaball new [Re: osbourne one-nil]
      #6487123 - 04/25/14 04:25 AM

Quote:

Well, for me anyway, I don't really do happy....just a bit less grumpy.



Have you discussed this with Dr. Phil.!
Sam


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osbourne one-nil
scholastic sledgehammer


Reged: 07/03/06

Loc: Cumbria, England 54.5ºN 2.5º...
Re: Convince me on an 8" portaball new [Re: planet earth]
      #6487169 - 04/25/14 05:39 AM

The only doctor who could help me would be Doctor Who by taking me back in time and starting again...and hopefully involving Kylie Minogue somehow...that would cheer me up.

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planet earth
Carpal Tunnel
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Reged: 09/07/10

Loc: Ontario Canada
Re: Convince me on an 8" portaball new [Re: osbourne one-nil]
      #6487211 - 04/25/14 07:18 AM

Quote:

The only doctor who could help me would be Doctor Who by taking me back in time and starting again...and hopefully involving Kylie Minogue somehow...that would cheer me up.





Sam


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Sgt
Pooh-Bah
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Reged: 12/17/05

Loc: Under the southern horn of the...
Re: Convince me on an 8" portaball new [Re: planet earth]
      #6488576 - 04/25/14 07:02 PM

Congrats Piers! I've never seen one of those come up for sale in the UK. I was eyeing that up myself in case you didn't go for it.

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121601
super member


Reged: 08/18/04

Re: Convince me on an 8" portaball new [Re: osbourne one-nil]
      #6488838 - 04/25/14 09:48 PM

...Anyway, did the deal last night, and will get hold of it in a couple of weeks when the vendor passes close by on the way to Scotland. Can't wait!...

congrats! you won't regret it. for what it's worth, Roland
Christen does think highly of the portaballs. I'm glad I never sold mine (12.5). It's the kind of scope where you can arrive late in the night and still be ready to observe in 30 min. David Juckem also provides excellent support for old models.


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osbourne one-nil
scholastic sledgehammer


Reged: 07/03/06

Loc: Cumbria, England 54.5ºN 2.5º...
Re: Convince me on an 8" portaball new [Re: 121601]
      #6489156 - 04/26/14 03:24 AM

Thanks both - I imagine it's going to join my TV85 in being a telescope I never want to be without.

Any tips on getting in touch with David Juckem? I've emailed a couple of times in the past year and heard nothing back. The model I've bought has three Teflon pads on the base ring rather than a ring of Teflon all around it like the new ones, so I'm wondering about 'upgrading' to one of those. I've also seen it said that having two base rings is a good idea for when you want to move the telescope about to save scratching the base by laying it on anything other than Teflon!


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121601
super member


Reged: 08/18/04

Re: Convince me on an 8" portaball new [Re: osbourne one-nil]
      #6489576 - 04/26/14 10:48 AM

Quote:

Any tips on getting in touch with David Juckem? I've emailed a couple of times in the past year and heard nothing back.




Have you tried posting at the PortaBall Yahoo users group?


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Pinbout
Postmaster
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Reged: 02/22/10

Loc: nj
Re: Convince me on an 8" portaball new [Re: osbourne one-nil]
      #6489941 - 04/26/14 02:00 PM

We want to hear about 1st light....



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osbourne one-nil
scholastic sledgehammer


Reged: 07/03/06

Loc: Cumbria, England 54.5ºN 2.5º...
Re: Convince me on an 8" portaball new [Re: 121601]
      #6490217 - 04/26/14 04:13 PM

Well, you'll have to wait until at least May 10th, then add a bit on for the first clear night, then a few months for the skies to get truly dark again....and I'll post my thoughts!

Quote:

Have you tried posting at the PortaBall Yahoo users group?


Ah - good idea. I didn't know there was such a thing but I'll go and have a look!

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jpcannavo
scholastic sledgehammer
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Reged: 02/21/05

Loc: Ex NYCer, Now in Denver CO!
Re: Convince me on an 8" portaball new [Re: osbourne one-nil]
      #6490957 - 04/26/14 10:56 PM

Piers

The only thing to really reconcile with a portable is that such things as digital setting circles, GoTo, DobDriver, ServoCat, etc. will not be in you future. On the other hand, if these are not issues - and they need not be!! - a PortaBall is wonderfull scope. Paired with a good equatorial platform it achieves a level of mechanical and functional elegance that is in many ways unsurpassed. As for Zambuto optics (which I now use, and have previously used Royce and Swayze, as well Mead and Orion ) with excellent seeing, thermal equilibrium and proper collimation they will shine. But there is absolutely no magic here - premium optics can't "decode" the scrambled optical information that poor seeing presents to them. As such, the bloated, obliterated diffraction pattern (for a given aperture) introduced by poor enough seeing renders the difference between outstanding and average Strehl ratios as essentially irrelevant. Polish however is another thing. Even with less than good enough seeing, a Zambuto optic should render better contrast on detail that is resolvable than a mass produced mirror will. The bottom line is that a PortaBall is a very fine instrument indeed. Wedded to the right owner, a beautiful relationship will surely emerge. Look forward to hearing how you like it!

Joe


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azure1961p
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Reged: 01/17/09

Loc: USA
Re: Convince me on an 8" portaball new [Re: nicknacknock]
      #6490973 - 04/26/14 11:05 PM

Quote:

Quote:

Quote:



Quote:
--------------------------------------------------------------------------------

the CZ mirror will kick the but of the Orion Optics in the sumerain...literally mop the floor with it.


--------------------------------------------------------------------------------



Because it was decreed by whom? Orion Optics makes excellent mirrors. Please refrain from debasing a manufacturer like that.




saying CZ is much better than OO is debasing them? lighten up. I've seen some pretty hideous examples from OO. I haven't seen any from CZ.




Kick the butt and mop the floor probably fits the bill for debasing.....




Or focusing.

Pete


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Rinaldo
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Reged: 06/28/04

Loc: Lawng-eye-lind - New York, USA
Re: Convince me on an 8" portaball new [Re: osbourne one-nil]
      #6491093 - 04/27/14 12:47 AM

Quote:

I've always lusted after a Portaball, and now one is available

...would give me 8" of, hopefully, APO-like aperture, in a lightweight and relatively transportable unit; at least enough to drive into the Lake District, park up and carry it 100yds into a field.





Go for it.

As far as reaching David, phone is best. He is not good at returning calls or emails unfortunately, so don't bother leaving a message either. However, when he picks up the phone he will spend easily a half hour or more chatting with you and answering all your questions!


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osbourne one-nil
scholastic sledgehammer


Reged: 07/03/06

Loc: Cumbria, England 54.5ºN 2.5º...
Re: Convince me on an 8" portaball new [Re: jpcannavo]
      #6491253 - 04/27/14 04:07 AM

Quote:

The only thing to really reconcile with a portable is that such things as digital setting circles, GoTo, DobDriver, ServoCat, etc. will not be in you future.




Which I think is a positive. I've got a goto mount (ZEQ25) and a push-to (Argo Navis on a Porta II) but I rarely use them. I like the challenge!


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osbourne one-nil
scholastic sledgehammer


Reged: 07/03/06

Loc: Cumbria, England 54.5ºN 2.5º...
Re: Convince me on an 8" portaball new [Re: Rinaldo]
      #6491263 - 04/27/14 04:27 AM

Quote:

However, when he picks up the phone he will spend easily a half hour or more


I might call him from a friend's house then...might cost a few quid.

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jpcannavo
scholastic sledgehammer
*****

Reged: 02/21/05

Loc: Ex NYCer, Now in Denver CO!
Re: Convince me on an 8" portaball new [Re: osbourne one-nil]
      #6491428 - 04/27/14 08:49 AM

Quote:

Quote:

The only thing to really reconcile with a portable is that such things as digital setting circles, GoTo, DobDriver, ServoCat, etc. will not be in you future.




Which I think is a positive. I've got a goto mount (ZEQ25) and a push-to (Argo Navis on a Porta II) but I rarely use them. I like the challenge!




Chart in hand navigating a sea of stars! My preference as well, look forward to your first light!

Joe


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rdrane
member


Reged: 09/18/07

Re: Convince me on an 8" portaball new [Re: osbourne one-nil]
      #6506123 - 05/04/14 03:24 PM




I might call him from a friend's house then...might cost a few quid.




Dave still actively posts on the PortaBall Yahoo forum. I recommend you joining it. BTW, the 18 inch is still scheduled to come out. Clear skies.


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Deep13
Carpal Tunnel
*****

Reged: 01/25/05

Loc: NE Ohio
Re: Convince me on an 8" portaball new [Re: osbourne one-nil]
      #6506546 - 05/04/14 07:27 PM

"Convince me on an 8" portaball"

DO IT!!!!

seriously, sell the 6" SCT. Sell the 10" closet dweller and get the 8". It cools quickly enough (unlike the SCT) to use brief times of clarity and will give a lot more to see than either the 3" refractor or any 4-5" refractor could. I have a Discovery (from California) 8" Dob and set up next to my TV101, the difference is not even close. The 8" consistently shows more detail unless the collimation is off or it is not cooled enough. I added an electric fan that solved the cooling problem.


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nevy
professor emeritus
*****

Reged: 02/07/12

Loc: UK
Re: Convince me on an 8" portaball new [Re: Deep13]
      #6506575 - 05/04/14 07:46 PM

Quote:

"Convince me on an 8" portaball"

DO IT!!!!

seriously, sell the 6" SCT. Sell the 10" closet dweller and get the 8". It cools quickly enough (unlike the SCT) to use brief times of clarity and will give a lot more to see than either the 3" refractor or any 4-5" refractor could. I have a Discovery (from California) 8" Dob and set up next to my TV101, the difference is not even close. The 8" consistently shows more detail unless the collimation is off or it is not cooled enough. I added an electric fan that solved the cooling problem.




Ha ha closet dweller ,I like it


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