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Stellarvue 180mm; comparisons and contrasts with a LZOS 180mm/TEC 180mm?

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#26 Haydon

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Posted 02 January 2021 - 07:25 PM

Perhaps glass type should be more of the telescope company's concern and less of the consumer's.  


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#27 junomike

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Posted 02 January 2021 - 10:04 PM

Perhaps glass type should be more of the telescope company's concern and less of the consumer's.  

Possibly, but that's not usually the case when they're vying for one's hard earned cash and the competition has fully disclosed theirs (glass).



#28 bobzeq25

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Posted 02 January 2021 - 10:23 PM

Re who makes Stellarvue scopes.  Stellarvue is not the usual "rebrander" of Chinese scopes.  They're a hybrid between that, and a manufacturer.  The outsource much, do some work on the scopes in house.

 

And they're not very transparent about it.  It can be difficult to say how much of each is in a Stellarvue scope.   Some of their lenses are (or were) manufactured on site, others are (or were) in Chinese factories.  That changes with scope and time. 

 

The one thing that's certain is that they have substantially more expertise and optical equipment than an ordinary retailer.  Almost certainly less than some telescope manufacturers.


Edited by bobzeq25, 03 January 2021 - 11:10 AM.

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#29 JMW

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Posted 02 January 2021 - 10:33 PM

Here is a YouTube video that shows Stellarvue cutting, grinding, polishing and hand figuring blanks for the SVX series.

 

https://www.youtube....h?v=xKIPFWVxvNc


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#30 Spikey131

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Posted 02 January 2021 - 11:30 PM

Here we go......

 

Glass types......

 

China.....

 

Hand figuring....

 

popcorn.gif popcorn.gif popcorn.gif


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#31 Deadlake

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Posted 03 January 2021 - 04:56 AM

APM has a 7" Apo which will retail below $ 10,000.00 coming out. I suspect it will be non LZOS but FPL53 based, made in Taiwan, using an APM tube, hopefully with the starlight focuser. However in the 7” range even at that price the mount will cost around 10000 dollars and really needs an observatory to be mounted in. All adds up.

#32 CHASLX200

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Posted 03 January 2021 - 07:01 AM

APM has a 7" Apo which will retail below $ 10,000.00 coming out. I suspect it will be non LZOS but FPL53 based, made in Taiwan, using an APM tube, hopefully with the starlight focuser. However in the 7” range even at that price the mount will cost around 10000 dollars and really needs an observatory to be mounted in. All adds up.

Maybe luck out and get a used Titan for around $4k. Maybe a older used AP1200 for $5k. Forget a G11.


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#33 bobzeq25

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Posted 03 January 2021 - 11:20 AM


So here it goes.... Stellarvue’s theoretical 180 will probably have about the same aperture as the TEC180 and the LZOS 180. Comparison done.
[/quote]
Stellarvues current F ratios.
 
80 - F6
 
102 - F7
 
130 - F7
 
140 - F6.7
 
152 - F8
 
I'd guess the 180 will be F8, F7 is a possibility.  I'm guessing air spaced, I don't know if they've ever done oil spaced.  I'm also guessing a triplet.  The new glass may be in other elements than one that's FPL53. I'd take an even money bet.
 
In any event, I still say. 
 
It will bat in the same league to the other small manufacturer big scopes.  It will be similarly priced.

#34 rgsalinger

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Posted 03 January 2021 - 01:01 PM

Can someone provide me with a link to the announcement of the 180?
Rgrds-Ross

#35 121601

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Posted 03 January 2021 - 01:32 PM

Can someone provide me with a link to the announcement of the 180?
Rgrds-Ross

There is no web link yet.  This was announced on a SV mailing list.  CS
 

"...Many years ago we created a 180 mm f-7 Apo Triplet refractor and brought it to our Dark Sky Star Party. This telescope bested the 152's and 160's we had on hand, showing extremely fine detail at high power on the planets. We make the 180 mm (7") Apochromat with an f-7 focal ratio giving it the same focal length as our SVX152T but with an additional inch of aperture...We are only purchasing enough glass to make about 24 - 30 telescopes. This telescope will be priced commensurate with other premium American made telescopes in its size range.." (Vic Maris, January 2021 newsletter).


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#36 BillP

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Posted 03 January 2021 - 02:04 PM

There is no web link yet.  This was announced on a SV mailing list.  CS
 

"...This telescope will be priced commensurate with other premium American made telescopes in its size range.." (Vic Maris, January 2021 newsletter).

TEC 180 -- $19,000

 

AP 175 -- $21,000 (originally I believe)

 

So I guess SV is saying they will be in this ballpark.


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#37 junomike

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Posted 03 January 2021 - 03:38 PM

So here it goes.... Stellarvue’s theoretical 180 will probably have about the same aperture as the TEC180 and the LZOS 180. Comparison done.
[/quote]
Stellarvues current F ratios.
 
80 - F6
 
102 - F7
 
130 - F7
 
140 - F6.7
 
152 - F8
 
I'd guess the 180 will be F8, F7 is a possibility.  I'm guessing air spaced, I don't know if they've ever done oil spaced.  I'm also guessing a triplet.  The new glass may be in other elements than one that's FPL53. I'd take an even money bet.
 
In any event, I still say. 
 
It will bat in the same league to the other small manufacturer big scopes.  It will be similarly priced.

It's F7 according to SV.  see here!
 


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#38 junomike

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Posted 03 January 2021 - 03:39 PM

There is no web link yet.  This was announced on a SV mailing list.  CS
 

"...Many years ago we created a 180 mm f-7 Apo Triplet refractor and brought it to our Dark Sky Star Party. This telescope bested the 152's and 160's we had on hand, showing extremely fine detail at high power on the planets. We make the 180 mm (7") Apochromat with an f-7 focal ratio giving it the same focal length as our SVX152T but with an additional inch of aperture...We are only purchasing enough glass to make about 24 - 30 telescopes. This telescope will be priced commensurate with other premium American made telescopes in its size range.." (Vic Maris, January 2021 newsletter).

Listed in the other SV 180 thread.  Here's the pdf sent to those on the SV newsletter



#39 CHASLX200

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Posted 03 January 2021 - 03:43 PM

I would like to see a F/10 or slower.


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#40 Scott in NC

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Posted 03 January 2021 - 04:00 PM

I would like to see a F/10 or slower.

Sure, so would a lot of us.  But the problem is that you wouldn’t likely buy it, nor would 99% or more of those who say they’d like to see a 180mm f/10 scope.  Stellarvue couldn’t afford to build or source the components for a scope that large, only to have only a single person (or worse, no one) end up buying one.  I’d love to look through one of those scopes just as much as anyone, but can tell you that there’s zero chance that I’d ever buy that particular scope.


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#41 SimonIRE

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Posted 03 January 2021 - 04:03 PM

Sure, so would a lot of us. But the problem is that you wouldn’t likely buy it, nor would 99% or more of those who say they’d like to see a 180mm f/10 scope. Stellarvue couldn’t afford to build or source the components for a scope that large, only to have only a single person (or worse, no one) end up buying one. I’d love to look through one of those scopes just as much as anyone, but can tell you that there’s zero chance that I’d ever buy that particular scope.


Hi Scott,

Thanks. Are you saying that because of price? Mount needed?

Simon
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#42 CHASLX200

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Posted 03 January 2021 - 04:23 PM

Sure, so would a lot of us.  But the problem is that you wouldn’t likely buy it, nor would 99% or more of those who say they’d like to see a 180mm f/10 scope.  Stellarvue couldn’t afford to build or source the components for a scope that large, only to have only a single person (or worse, no one) end up buying one.  I’d love to look through one of those scopes just as much as anyone, but can tell you that there’s zero chance that I’d ever buy that particular scope.

I am sure it would be too long for most but if i had a choice over F/7 and had millions in the bank i would go F/10 in a heart beat.  Bigger mount needs also at that slower speed..


Edited by CHASLX200, 03 January 2021 - 04:24 PM.

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#43 Paul Hyndman

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Posted 03 January 2021 - 05:23 PM

I would like to see a F/10 or slower.

Then your dreams are already answered (and then some), you're just looking at the wrong design. Maybe this would be more suitable?

 

PS: Guaranteed to fit in most cars.

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#44 CHASLX200

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Posted 03 January 2021 - 05:38 PM

Then your dreams are already answered (and then some), you're just looking at the wrong design. Maybe this would be more suitable?

 

PS: Guaranteed to fit in most cars.

My chances of getting one are one in a million and i am sure i would never spend the money it would take to get one.  



#45 Suavi

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Posted 03 January 2021 - 05:57 PM

My chances of getting one are one in a million and i am sure i would never spend the money it would take to get one.  

For those lucky few, it will cost only $22k, so about the same as would quality 7" f/10 triplet. Besides it will most certainly show more than any 180 mm, it is definitely way more comfortable to look through than 7" f/10 and it rides on old and trusty Mach1. And yes, it fits in a car.

 

For the record, chances of me getting one are about the same...


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#46 CHASLX200

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Posted 03 January 2021 - 06:56 PM

For those lucky few, it will cost only $22k, so about the same as would quality 7" f/10 triplet. Besides it will most certainly show more than any 180 mm, it is definitely way more comfortable to look through than 7" f/10 and it rides on old and trusty Mach1. And yes, it fits in a car.

 

For the record, chances of me getting one are about the same...

A good old used 14.5" Zambuto Starmaster would do me better yet and cost maybe 6k used. If Meade could do a 7" ED with a mount for around $6K 22 years ago then it can be done today for around 12k and at least make a cell that works unlike the Meade 7" ED.



#47 Scott in NC

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Posted 03 January 2021 - 08:21 PM

Hi Scott,

Thanks. Are you saying that because of price? Mount needed?

Simon

All of the above.  Size, weight, price, mount required, etc.


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#48 bobzeq25

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Posted 04 January 2021 - 02:02 PM

An F10 refractor is more a visual/planetary scope than a DSO imaging scope.  And DSO imagers are Stellarvue's bread and butter.  They are who will pay the $20K.


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#49 RedzoneMN

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Posted 04 January 2021 - 05:17 PM

Who makes 150-180 mm scopes with the longest f ratios?


Edited by RedzoneMN, 04 January 2021 - 07:04 PM.


#50 CHASLX200

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Posted 04 January 2021 - 07:28 PM

An F10 refractor is more a visual/planetary scope than a DSO imaging scope.  And DSO imagers are Stellarvue's bread and butter.  They are who will pay the $20K.

I am 100% a eye baller and never took a Photo in my life, well did do some a focal shots with some help with my 4" Unitron in the late 80's. But i am 100% visual and 90% of the time planets only, so a slower scope is what i would rather have.  But once you get over 6" then slower means longer and more demand on a mount and the back.

 

 




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