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Need help picking basic Alt-Az mount

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#1 Arringar

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Posted 17 October 2020 - 10:05 PM

I'm trying to find a basic Alt-Az mount that will handle a TOA-130 (about 25 lbs.)  So far I haven't found any options that are rated above 20 lbs.  I'm not really into visual observing, but I would like to put this scope on something to get some use out of it.  I really don't want anything expensive since this is just for occasional use.  Something like the Vixen Porta II is what I have in mind, but honestly I'm a bit lost when it comes to this sort of mount.

 

Any advice or suggestions would be appreciated.  Thanks!  


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#2 hcf

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Posted 17 October 2020 - 10:24 PM

ES Twilight II ?

 

https://explorescien...wilight-2-mount



#3 Arringar

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Posted 17 October 2020 - 10:27 PM

I've been looking at those.  It's the only thing I can find that will safely handle the weight.  Found a used one in the classifieds.



#4 hcf

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Posted 17 October 2020 - 10:33 PM

I don't have one, but I see people with the ES AR152s  use them.

 

However, AFAIK, no slow motion controls.



#5 ShaulaB

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Posted 17 October 2020 - 10:51 PM

The Vixen Porta II is a nice mount, I enjoy using it. But I think the weight limit is 20 pounds.

 

Good luck and keep scanning the classifieds.

 

Have you considered building your own mount? People have done that successfully. If you can find a copy of Richard Berry's classic book on How to Build a Telescope, you can get some ideas if you are a handy person. https://www.amazon.c...y/dp/0943396697



#6 cookjaiii

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Posted 17 October 2020 - 11:51 PM

My Vixen Porta II struggles to handle a 100mm f/9 refractor, which is shorter and half the weight of your TOA-130.  


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#7 StarryHill

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Posted 18 October 2020 - 12:39 AM

I have a TOA 130... it is a beast... I recommend a heavy-duty altaz like a Losmandy AZ8. Its $1000. There's also the Discmount DM-6 but it is far more expensive. If you already have a good tripod, you can save some money on either one.


Edited by StarryHill, 18 October 2020 - 12:40 AM.

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#8 wavelandscott

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Posted 18 October 2020 - 08:02 AM

I understand that it might be more than you want to spend but the DM6 will work well.  I have monkeyed around with some of the less expensive options first and wish I had just gone with the DM6...would have saved me some frustration and storage space if I had.

 

I am strictly visual.  


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#9 StarAlert

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Posted 18 October 2020 - 11:54 AM

I'm trying to find a basic Alt-Az mount that will handle a TOA-130 (about 25 lbs.)  So far I haven't found any options that are rated above 20 lbs.  I'm not really into visual observing, but I would like to put this scope on something to get some use out of it.  I really don't want anything expensive since this is just for occasional use.  Something like the Vixen Porta II is what I have in mind, but honestly I'm a bit lost when it comes to this sort of mount.

 

Any advice or suggestions would be appreciated.  Thanks!  

An inexpensive (less than $1,000) Alt-Az mount that will handle a TOA-130 (well) does not exist. I spent a long time trying to find a similar mount. I finally just accepted my fate and ponied up the cash for a proper mount.  


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#10 LDW47

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Posted 18 October 2020 - 01:22 PM

I've been looking at those.  It's the only thing I can find that will safely handle the weight.  Found a used one in the classifieds.

If the II is like the I , it is about 4-6” shorter than the Porta I or II models so unless you are short to get comfortable for a long viewing nite out you will have to sit to view. Other than that I had a TW I and it was an excellent mount, smooth and solid !



#11 LDW47

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Posted 18 October 2020 - 01:25 PM

You can’t have rock, rock solid yet cheap ! Choose one or the other and my choice is the Porta II , I have three of them for refractors up to 20lb.+, got rid of my 3 VersaGo’s and TW I, for the reason mentioned !


Edited by LDW47, 18 October 2020 - 01:26 PM.


#12 JGlover

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Posted 18 October 2020 - 02:14 PM

A Stellarvue M2C may work, it’s rated right at 25 pounds. The M2C works fantastically with my 100/7 and so far has been able to handle the 120/8.3. Those are both doublets though and don’t approach the 25 limit. I use mine with the SV extension column mount in a solid 2” ASGT tripod and it’s very solid.

#13 StarAlert

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Posted 18 October 2020 - 02:49 PM

Let’s be realistic here. First, a TOA 130(NS) weighs over 23lbs bare. Add rings, dovetail, diagonal (and finder?) and you’re easily close to, if not over, 30lbs. This scope has a focal length of 1000mm and is nose heavy. I don’t see how any 20-25lb-rated mount is going to work. 


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#14 makeitso

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Posted 18 October 2020 - 02:52 PM

I have a porta ii I use with my AT102ED, it is shaky at higher mags, I don’t recommend it for your much larger telescope. Maybe it would work better with a non aluminum legged tripod, I don’t know.

 

My solution was to get a cg4 mount and convert it to az/eq mode. Very simple and easy conversion to do, it took me all of 30 minutes with a dremel. It holds my Meade LX70 R5 (120/f8.3) with no problem, I’ve even had my 8” f5 newt on it with some success.

 

The beauty of this mount is it can be had very cheap used, there are a ton of them out there, it has slow motion controls and, you can add motors for tracking if you want.

Jack



#15 fishonkevin

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Posted 18 October 2020 - 03:24 PM

This mount can handle it. http://www.rowanastr.../productsa6.htm

 

Here is a good thread about it.

https://www.cloudyni...ived/?hl= rowan



#16 junomike

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Posted 18 October 2020 - 03:35 PM

Unless you go with a single OTA Mount only, you'll need some sort of counter-weight opposite the OTA to obtain smooth movement.

My UA Deluxe can handle that much weight, but It's still not ideal IMO.

I'd be more inclined to mount something like that on my Sky-Tee 2 (w/counter-weight).



#17 mtminnesota

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Posted 18 October 2020 - 10:15 PM

Here's a compact alt-az mount with slo-mo controls that has a 35kg weight rating.  They will be available in around six weeks.

 

https://www.telescop...5517133347.html



#18 LDW47

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Posted 18 October 2020 - 10:17 PM

Let’s be realistic here. First, a TOA 130(NS) weighs over 23lbs bare. Add rings, dovetail, diagonal (and finder?) and you’re easily close to, if not over, 30lbs. This scope has a focal length of 1000mm and is nose heavy. I don’t see how any 20-25lb-rated mount is going to work. 

You are definitely correct !



#19 LDW47

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Posted 18 October 2020 - 10:21 PM

Some of the recommendations are excellent but didn’t the poster say they didn’t want too expensive ? But they never did put a $ value against ‘not too expensive’, lol !



#20 LDW47

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Posted 19 October 2020 - 09:27 AM

Here's a compact alt-az mount with slo-mo controls that has a 35kg weight rating.  They will be available in around six weeks.

 

https://www.telescop...5517133347.html

When you go to that site and change to English it doesn’t give you the write up or specs just the up front talk !  Why ?



#21 laedco58

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Posted 19 October 2020 - 09:57 AM

No way, no how will a Vixen Porta II be adequate for a TOA 130. Even if you mounted it on a pier the clutches wouldn’t be sufficient for the weight.


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#22 28gauge

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Posted 19 October 2020 - 10:02 AM

When we are referring to the Porta ll capacity, are we referring to the mount or the tri-pod. I'm thinking of going from my Vixen 81 to a heavier 100 refractor. I think I'm going to stick with the Porta ll head and upgrade the tri-pod from my Berlebach Report to a Berlebach Uni 28 which will hold a house. You can buy the Porta ll head separately and choose a heavier tripod.


Edited by 28gauge, 19 October 2020 - 10:03 AM.


#23 laedco58

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Posted 19 October 2020 - 10:15 AM

When we are referring to the Porta ll capacity, are we referring to the mount or the tri-pod. I'm thinking of going from my Vixen 81 to a heavier 100 refractor. I think I'm going to stick with the Porta ll head and upgrade the tri-pod from my Berlebach Report to a Berlebach Uni 28 which will hold a house. You can buy the Porta ll head separately and choose a heavier tripod.

The Porta II I gifted to my grandchildren is on a Berlebach Report tripod. Solid and stable with their Star Blast 4.5, as it was with my SV80A. I thought I would get motion sickness when I mounted my FC100DL on it. My HD 5 Gibraltar is on a Uni 14, that combo would work well with the OP’s TOA 130, but they are not inexpensive.


Edited by laedco58, 19 October 2020 - 10:22 AM.


#24 28gauge

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Posted 19 October 2020 - 10:25 AM

And the FC100DL is on the light side for a 100mm. That's why I would go to the UNI 28. It's twice the weight of the Report and rated for over 100 lbs. However, I think the Porta ll head on the UNI 28 will do just fine. 


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#25 28gauge

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Posted 19 October 2020 - 10:50 AM

With the correct counterweight set-up, you don't even use the clutches:

IMG 0579
IMG 0578



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