Author Topic: What do I buy after an 8 inch dob?  (Read 1062 times)

esrescioripp

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Re: What do I buy after an 8 inch dob?
« Reply #15 on: January 10, 2018, 03:25:46 PM »
Portability and bigger then 8" are a little incompatible.
It is said that to appreciate more aperture you need to double the area. So that means 11" from the 8", as 12" scopes are more common I suppose that means going to 12".

A 12" will have to be faster and that brings in additional aspects such as a coma corrector. Seeing dimmer things is fine but you likely want to see them well also.

Kind of suspect that an SCT will be a big change, really it is the nature of a reflector compared to an SCT. In effect a 10" reflector is very different to a 10" SCT.

adpotabza

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Re: What do I buy after an 8 inch dob?
« Reply #16 on: January 13, 2018, 06:00:48 AM »
I recently went from a 6" newt to a 8" SCT. It is really nice having the tracking especially when you are showing to others. The goto is nice as well though I haven't played with it too much yet.

Have you considered the 11" Celestron SCT AVX? It would be a nice jump from the 8" and I believe the heaviest single piece is like 30 lbs or so.

-Steve

pernogori

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Re: What do I buy after an 8 inch dob?
« Reply #17 on: January 14, 2018, 01:50:20 AM »
Hmmm, the wheels are spinning for sure now. I should say that portability is not that important to me. My hesitation in getting the xx12g is that I don't think I'd use it that much because of its weight. If I figured out a way to move it easily out to the backyard and back maybe that would be the answer. A long set up time is going to keep me from using it as often as I'd like.

Jimmy Harbaugh

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Re: What do I buy after an 8 inch dob?
« Reply #18 on: January 18, 2018, 08:47:48 AM »
I guess I will weigh in because I have owned all the scopes the OP has mentioned (8" manual Dob, 12" goto Dob, and 9.25 SCT). Let me start in saying that the difference from 8" to 12" is real and noticeable. Objects are much brighter and clearer. Seeing the E and F stars in Orion is a piece of cake even on a night of below average seeing. Not so much with the 8". The 8" is more transportable and the quickest to set up. The XT12G takes about 10 minutes or less to set up an be observing. The 9.25 takes me twice as long to set up (20 minutes or more) because of all the extra things I have to do with it (trips to carry stuff). The XT12G is: carry base (around 50lbs), carry OTA (around 50lbs), battery, observing chair, EP case. The 9.25 is: Tripod and level tripod, Mount, OTA, Observing chair, Dew shield and dew straps, Dew controller, Battery, EP case, then plug it all in and route wires so that nothing gets tangled and pulled out. Collimating the Dob was all of about 1 minute, The SCT does hold better but much harder and time consuming to collimate. The 12" has better views that the 9.25 SCT. The 9.25 Evolution does track better than the XT12G. I am not trying to steer you in any direction, just telling you my observations having owned all 3 of the scopes you are talking about. Included is a picture of all 3 of my scopes.Attached Thumbnails




quetafulra

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Re: What do I buy after an 8 inch dob?
« Reply #19 on: January 21, 2018, 07:50:20 AM »
Quote
Hmmm, the wheels are spinning for sure now. I should say that portability is not that important to me. My hesitation in getting the xx12g is that I don't think I'd use it that much because of its weight. If I figured out a way to move it easily out to the backyard and back maybe that would be the answer. A long set up time is going to keep me from using it as often as I'd like.

I did this with my 12" at home.

Attached Thumbnails


Clint Trotter

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Re: What do I buy after an 8 inch dob?
« Reply #20 on: January 22, 2018, 07:52:23 PM »
Quote
Hmmm, the wheels are spinning for sure now. I should say that portability is not that important to me. My hesitation in getting the xx12g is that I don't think I'd use it that much because of its weight. If I figured out a way to move it easily out to the backyard and back maybe that would be the answer. A long set up time is going to keep me from using it as often as I'd like.


Help us out here. We have no idea what your living or storage situation may be?

Do you live in a 2nd floor walk up apartment?

Do you have a ground floor garage?

Just because a truss Can be taken apart doesn't mean it has to be taken apart. If I had a 12G I would leave it assembled on a cart in the garage.I posted in #14 that my Dob sits on a cart and I just roll it out. I could do the same with a 16" scope. A 16" scope would take no longer to set-up than an 8" for me. I would use a dedicated Dob cart or a hand truck to move it. Billytk posted wheel barrow handles.

Here is an Orion Dob cart for up to a 10"https://www.telescop...eyword=Dob cartDob Carts
https://www.telescop...es/p/102416.uts
http://www.jimsmobil...heeley_bars.htmMY 8" DOB - LIVES IN THE GARAGE
AND JUST ROLLS OUT TO THE OBSERVING SITE.Attached Thumbnails


Anthony Eppinger

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Re: What do I buy after an 8 inch dob?
« Reply #21 on: January 22, 2018, 08:15:59 PM »
Quote
I'm going to suggest the opposite direction, that is, getting a quality 4" f/7 APO refractor on a go-to mount. The "wow factor" will be different however. The wide field views will be outstanding; you'll say wow every time you see the sharp contrasty star images; the set-up time will be minimal with little waiting for the optics to cool-down; the whole set-up won't be that heavy; its family friendly with tracking and go-to; on an AVX or Sirius mount the OTA will be very stable and you can sit down for most viewing. APO Refractors are the most efficient instruments giving the sharpest views for their size. For brighter images you need more aperture and you already have that. But for the planets, moon, double stars, and clusters it's hard to beat a good refractor. An APO and a larger Newtonian make a superb combination.

One thing to add here is that the mount is a large part of the cost of either a 4" apo (I'd just get a 100ED if you go this route, as it's by far the cheapest option) or an 8" SCT. However, if you get a good equatorial mount like an AVX, it could carry either. So you could get one now and one later and share the mount between them.
An AVX can kinda-sorta carry a 9.25" SCT too.

neukascome

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Re: What do I buy after an 8 inch dob?
« Reply #22 on: January 23, 2018, 01:52:53 AM »
Oh, and I forgot to mention that the 9.25 OTA is my opinion too big for the Evolution mount. Focusing was VERY hard compaired to the Dobs. I ended up getting an electric focuser for it to solve that problem. Also, if there is a little wind, I can forget using the dew shield. The shakes are too much with the sail on the end of it. I should have gotten a 9.25 CPC. Much more stable.

buckfeedssapfai

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Re: What do I buy after an 8 inch dob?
« Reply #23 on: January 23, 2018, 04:16:11 PM »
I live in a rambler with plenty of storage.  My xt8i is in my bedroom currently and a larger scope could easily fit too.  I just have to go down a couple steps to take it out back.  I'm not that handy but if I could figure out how to wheel the xx12g out back that would help with the weight and setup time.

Theodore Inlaw

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Re: What do I buy after an 8 inch dob?
« Reply #24 on: January 23, 2018, 06:58:29 PM »
Do you have a ground level garage?  Then there are no steps.  You leave it on a cart or you move it with a hand truck, fully assembled.

If you have to keep it in the house, use a stair climbing hand truck to move it.
http://www.northernt...m_content=48450

Video
https://www.youtube....tHrHbU0mxk&t=7s
https://www.youtube....h?v=0PpNLD3TrdE

But keeping it in a ground level garage would be better.

Daniel Johnson

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Re: What do I buy after an 8 inch dob?
« Reply #25 on: January 25, 2018, 07:30:14 PM »
I did not read every post, but including a 9.25 SCT in the list of Newtonians is interesting. At F10 you will be disappointed right off the bat in comparison to your 8" F5 or something Newt.
I'm not going to chime in on all the good comments already made. I own an 8" SCT and a 12" Newt and a 90mm Mak.. I have owned a 10" and a 16" Newt and a 6" Refractor. The Newts win hands down on the views they produce. There is no substitute for aperture and fast focal length for wonderful deep sky views. IMHO find a goto Newt if your aspirations are purely visual.
Just my $0.02 worth.Phil

Ralph Sonberg

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Re: What do I buy after an 8 inch dob?
« Reply #26 on: January 26, 2018, 01:39:39 AM »
I have the XT12g and it grabs a lot of light. It does require 12V external power. Orion sells an AC adapter but some folks don’t recommend AC power for powering scopes.

The base and tube are heavy but if you are going from your garage to your yard should be no big deal particularly if you get a cart some folks here are suggesting. I carry mine out one at a time. The tube is stored in the Orion soft case with the strap that I carry out of my garage to my yard.

Once you do the 2 star alignment, the scope slews accuractly and tracks well. The object stays in the field of view until you get tired of looking at it.

rioclamabik

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Re: What do I buy after an 8 inch dob?
« Reply #27 on: January 31, 2018, 12:37:03 AM »
I found the biggest step up for me was adding an equatorial platform. I can put my 8 inch Dob on it, or my 12 inch Dob.Both have unity finder devices and the 12 inch has an 8x50 RACI finder and Sky Commander for push-to finding. The platform makes it easy for everyone in the family to see stuff, change eyepieces, focus for themselves, etc. and get as long to look for or at whatever their heart desires. Didn't cost an arm and leg either. I also have a quality refractor on a goto GEM and have had an 8 inch SCT in the past. By far the best addition was the platform....my trajectory was slightly different from yours; I went SCT to refractor then added a light bucket then the platform and now the smaller dob. The big dob is a challenge for me in my home but I am happy to live with it, given its performance, especially on the platform.
Hope you find a solution that works for you and your family. Nice to have such first world problems...

Norm

therpomercu

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Re: What do I buy after an 8 inch dob?
« Reply #28 on: January 31, 2018, 06:15:39 AM »
Okay, that's a couple votes for the equatorial platform. Would that be hard to do? I haven't liked into yet, mostly because I'm not that handy.
I do have a garage but with young kids that are constantly moving bikes and scooters in and out I'm hesitant to store a big dob there.  I do have a shed though.  I've never thought of it before but I guess I could store it there.  Are bugs and spiders not an issue though?  And what about the changing temperatures throughout the day and seasons?  Is that a concern on the mirror?

lodersconsharp

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Re: What do I buy after an 8 inch dob?
« Reply #29 on: January 31, 2018, 09:43:46 AM »
Storage in an unheated shed is mostly a win-win. Temp changes won't hurt the mirrors. Your mirrors will be closer to the outside temp than if they were inside with heat and A/C. All you need to do regarding spiders and dust is to be conscientious about dust caps. I use old sheets over my scopes as an extra layer of protection.

I own 3 different EQ platforms, the first bought new and the others bought used. The prices ranged from $300 used to $550 new.