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Best refractor for a DM6

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#1 Tyson M

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Posted 15 May 2020 - 11:00 PM

Okay all, I need all you refractorholics here to weigh in!

 

Lets say budget was not an issue and your mount was a DM6 and a losmandy HD folding tripod. 

 

What refractor would you choose?  I hear a TEC180 can be mounted on this mount decent but not ideal.  So then I am thinking about a scope 130mm-160mm max for greater stability.

 

TOA130 or TOA150?  AP155? CFF165?  TEC 140 or TEC160? LZOS?

 

I have a DM6 with Nexus coming to me in the next few days, mounted on a Discmount tall tripod (200lbs capacity) but there is a high possibility I might buy another tripod- the losmandy HD folding tripod for times where I want to put an even heavier refractor on it than my TSA120.

 

People say the TOA130 is the best.  I am thinking hard about that scope these days. But then I might use it over the TSA120 as they are close in aperture which might make the latter redundant. 

 

I am 34 years old and fairly strong.  I am curious to hear your thoughts on what refractor you would choose.  I would prefer rock hard stability with no vibrations as I am getting pickier with that as wind can be problematic, until I build an observatory at my dark site.

 

Regards


Edited by Tyson M, 15 May 2020 - 11:08 PM.

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#2 Kunama

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Posted 15 May 2020 - 11:14 PM

A friend has his TOA130NS on the DM6, it is a great combination with the Nexus DSC.


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#3 stevew

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Posted 15 May 2020 - 11:34 PM

Okay all, I need all you refractorholics here to weigh in!

 

Lets say budget was not an issue and your mount was a DM6 and a losmandy HD folding tripod. 

 

Regards

I'd say an Astro Physics Traveler would be perfect....


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#4 Tyson M

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Posted 15 May 2020 - 11:48 PM

I'd say an Astro Physics Traveler would be perfect....

The Traveller would be waay overmounted.  The traveller was perfect for an M2 mount, but with the DM6 I upgraded to it demands a larger scope. 


Edited by Tyson M, 15 May 2020 - 11:53 PM.


#5 Allan Wade

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Posted 15 May 2020 - 11:54 PM

The TOA130 is indeed a good match for the DM6. The key ingredient to rock solid stability you search for is the tripod. That's where the Losmandy FHD is very good. I even put mine on wheels.

 

I've used Tom Peter's TEC180 a few times, and that is so stable on the same mount/tripod configuration as mine. That IS the answer to your thread title. 

 

And yes, if you get a TOA130 your TSA120 won't see any more use, so I would put some thought into your long term plan. Better of with a TEC160/180 class scope to complement the 120/130 class you have so they all have a roll to play in your lineup. Having spent many sessions with my friends TEC160, there's not enough of a performance gap between that and my TOA130 to warrant ever owning both. I've long since thought a TOA130 and TEC180 would be a good pairing.

 

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#6 Tyson M

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Posted 15 May 2020 - 11:56 PM

The TOA130 is indeed a good match for the DM6. The key ingredient to rock solid stability you search for is the tripod. That's where the Losmandy FHD is very good. I even put mine on wheels.

 

I've used Tom Peter's TEC180 a few times, and that is so stable on the same mount/tripod configuration as mine. That IS the answer to your thread title. 

 

And yes, if you get a TOA130 your TSA120 won't see any more use, so I would put some thought into your long term plan. Better of with a TEC160/180 class scope to complement the 120/130 class you have so they all have a roll to play in your lineup. Having spent many sessions with my friends TEC160, there's not enough of a performance gap between that and my TOA130 to warrant ever owning both. I've long since thought a TOA130 and TEC180 would be a good pairing.

 

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So just to be clear, you're saying the TEC180 can and work great with that set up?  It would be nice to keep my TSA120 because it is so light and portable that I think it might be the perfect balance of portability vs aperture.



#7 Allan Wade

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Posted 16 May 2020 - 12:03 AM

Tom had his TEC180 setup perfectly and it was so smooth and stable. I would have zero concerns about that combination.

 

Yep, I reckon a TSA120 and TOA130 pairing would be close to a waste of time and money. I would decide firstly which of those two you want most and then find a bigger apo after that. A TEC160 would be a good choice to go with your TSA120. But as I suggested, I don't think the 160 pairs so well with the TOA130. It's getting back to that waste of money thing by having scopes too close together in size/weight/capability.


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#8 Tyson M

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Posted 16 May 2020 - 12:05 AM

Say I kept the TSA120...then the TEC160 would be worth it or the 180? I'm guessing the latter

#9 Allan Wade

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Posted 16 May 2020 - 12:07 AM

1.jpg


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#10 Allan Wade

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Posted 16 May 2020 - 12:12 AM

By keeping the TSA120 you have more options for your larger aperture scope. For sure the TEC180 is a more capable performer, and one of the ultimate portable apo's you can buy. But I always really liked Bill's TEC160, and it was only slightly bigger and heavier than the TOA130.


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#11 Kunama

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Posted 16 May 2020 - 12:13 AM

I think if keeping the TSA120 the next logical step would be 150mm or bigger.


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#12 M44

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Posted 16 May 2020 - 12:22 AM

I don't own DM6, so I cant really say. I own a TOA 130 on AYOMaster.

 

But when I look at TEC 180 on DM6, I don't think it is comfortable viewing at zenith. May be with a taller Pier with a step stool it is comfortable. I also do not like the skinny 3 leg extension on DM6. I firmly believe in over mounting and having maximum surface contact between Tripod and Mount. 

 

I like the Allan's input on having 130/180. 

 

Bottom line is keep TSA 120 and get 160. 


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#13 doctordub

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Posted 16 May 2020 - 01:21 AM

Tom Peters of Discmounts had his TEC 180 FL on the DM6 extension and Losmandy HD tripod at NEAF 2018 and I believe 2019. It was very easy viewing even at zenith. I have had my Takahashi FS-152 NSV on my DM6 extension an  Berlebach Planet Tripod for five years now and it gets a lot of use. It is solid and smooth at high power.

 

CS

Jonathan

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#14 Roragi

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Posted 16 May 2020 - 02:06 AM

I'd say an Astro Physics Traveler would be perfect....

A DM6 for a traveler is oversized, Mine is on a DM4 and it is more than enough. A DM6 would go well from heavy 5 '' refractors onwards, without going overboard. The most sensible thing is to enter Tom's website and see the characteristics of the scope to see if it supports DM6, in a 180 range perhaps at high magnifications the image is shaky.


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#15 ichdien

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Posted 16 May 2020 - 02:08 AM

I use an AP 155 edfs with a DM6, mounted on a Takahashi heavy duty metal tripod adapted for an AP extension.  It's a rock solid combination, and set on wheely bars, it's almost an oversized grab and go rig.  I mount everything on a Rob Miller 36M (with AP extension) when I want to set up somewhere other than my driveway.  Also rock solid.  If I were your age, I might consider selling the 155 and investing the proceeds in a TEC 180.

 

Best,

Jim


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#16 RubyCruxis

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Posted 16 May 2020 - 03:10 AM

Some fantastic photos and opinions above. I particularly love that setup doctordub has above. I don’t have a DM6, but I have a FS-152 on an EM-200. The FS-152 tube is quite light for a 6 inch refractor, and I think the DM6 combination for that scope would be an awesome, easy to deploy combination that would be used often. A dream combo for sure.


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#17 mark8888

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Posted 16 May 2020 - 03:39 AM

I use a TEC 180 on a DM6 with the Berlebach Planet tripod.  I put extra weight on the tray to make it super-stable.  So if you try the setup with the Losmandy and you aren't quite satisfied you could always try something similar, a little extra weight on the legs or whatever.  Incredible telescope by the way.  grin.gif

 

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#18 The Ardent

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Posted 16 May 2020 - 05:11 AM

A. Jaegers 6" f/5 lens/ Parallax build. With 31 Nagler + Baader Amici DX gives 25x and 3+ degree correct-image FOV. Not intended for high power or planetary viewing. Somewhat rare, definitely unusual, and made in the US. The short tube is very manageable. 

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#19 25585

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Posted 16 May 2020 - 06:06 AM

No such thing as overmounting! Buy a DM6, use it with your TSA120. You will be future-proofed for any larger scope in your future. How nice to have the DMs as an option!

 

In Europe there is the APM Maxload, AYO range & possibly the new Rowan AZ100 as top tier strong alt az mounts.



#20 bobhen

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Posted 16 May 2020 - 07:17 AM

What will the larger refractor be used for?

 

If for “just” deep sky observing, then one of the fast 150 mm F-5 or F-6 achromats available would do the job for a lot less. You could also contact APM and ask about larger, fast achromats. APM used to offer 180 mm F-6 achromats in the past. 

 

If also for lunar/planetary observing, then will your local Canadian seeing support a 180 mm aperture and would an alt/az mount be the best choice for the high power magnifications (over 400x) that a TEC 180 or even a 160mm apo can deliver?

 

If the answer is yes to the above, then I think the following would make a strong apo refractor, alt/az lineup for visual observing with about 50 to 60 mm between aperture jumps.

 

1. TEC 180 riding on a DM6 with Losmandy HD tripod, especially if the TEC will eventually be mounted in an observatory.

 

2. Takahashi TSA 120 riding on a DM4 with a Berleback wood tripod

 

3. Takahashi 76 DS or DCU riding on a Vixen Port with Berleback wood tripod.

 

Have fun selecting!

 

Bob



#21 25585

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Posted 16 May 2020 - 07:33 AM

Better maybe than a 6" achro might be a MN 190mm. Nice for the Moon & does DSOs good too.


Edited by 25585, 16 May 2020 - 11:14 AM.


#22 Tamiji Homma

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Posted 16 May 2020 - 10:00 AM

Here is 40lb (with rings, dovetail) LZSO 6" f/8 in William Optics OTA.  it is rock solid on this setup.

 

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It isn't refractor.  This (MakNewt MN-86) is my heaviest setup for DM-6.

When it is fully loaded with binoviewer and finder, it is about 50lb. 

Looks a little scary but it is very solid, no issue at 300x.

 

 

large.jpg

 

Tammy


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#23 Agatha

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Posted 16 May 2020 - 10:07 AM

I'd say an Astro Physics Traveler would be perfect....

This is good humor....grin.gif


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#24 DeanS

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Posted 16 May 2020 - 10:29 AM

TEC160FL and AP130GTX ;)

 

The tripod makes all the difference as well.  I originally used a GM8 tripod which came with my used DM6.  Changing to the HD Losmandy was a night and day difference in stability.


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#25 vkhastro1

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Posted 16 May 2020 - 11:25 AM

My Discmount 6 with 8” extension rides on an older Losmandy G11 tripod (with non-extending legs equipped with the original Losmandy leg levellers).

It holds my APM 180mm f/6 achromat without any issues - very smooth in both alt and az. 

 

I definitely agree with the previous comments that the tripod makes all the difference.

The beefier you can afford the better.


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