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Who makes the sharpest Lenses

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#1 AstroBob1951

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Posted 26 March 2020 - 06:21 PM

In anyone's opinion which company makes the best optical lenses?

 

Robert



#2 Don W

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Posted 26 March 2020 - 06:36 PM

Telescope lense?

 

Eyepiece lense?


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#3 Jim Waters

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Posted 26 March 2020 - 06:50 PM

Or camera lens?



#4 Jeff L

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Posted 26 March 2020 - 06:51 PM

Lens crafters


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#5 bobzeq25

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Posted 26 March 2020 - 06:52 PM

I presume you mean telescopes

 

Takahasi is well regarded.  Their FSQ106 is $6000.

 

https://optcorp.com/...g-ota-telescope

 

CFF makes some nice lenses.  Their 105mm is $4200.

 

https://cfftelescope...efractor-105-mm

 

Stellarvue is a bargain choice (I own two Stellarvues).  Their 102mm is $3000.

 

https://www.stellarv...plet-refractor/

 

TEC is a US company.  They make nothing small, their 140mm is $6600. 

 

https://www.tolgaast...any-tec140.html

 

Finally, there's Astrophysics, another US company.  Their 130 is $6600, but the waiting list can be years long.

 

https://www.astro-physics.com/130gtx

 

"Unfortunately, the 130GTX is not available off the shelf for immediate purchase. Over the years, we have maintained a notification list so that we can notify prospective customers when the scope is available to order. We will continue to utilize this list for future production. However, we are not accepting new names at this time.

 

December 28, 2019. We have planned another production run of the 130GTX for delivery in the late Spring and Summer of 2020. We will send notifications to people already on the list in late Winter."

 

Most of these companies make larger scopes, at high prices.  A 200mm CFF is a little less than $30,000.

 

https://cfftelescope...efractor-200-mm

 

"Availability/delivery time: ~9 months"  Speedy.

 

Or, did you have a budget?  <grin>


Edited by bobzeq25, 26 March 2020 - 06:59 PM.

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#6 mikeDnight

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Posted 26 March 2020 - 07:02 PM

If you are talking about telescopes, then Canon Optron make some of the world's finest lenses currently in production, for companies such as Takahashi and Borg. They are expensive, but you can order one today and receive it usually within days, or possibly just a few weeks. A Takahashi or Borg refractor could be the only scope you'll ever need.



#7 Narrowbandpaul

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Posted 27 March 2020 - 03:15 AM

LZOS in Russia make excellent lenses, although they are stopping this. APM use LZOS in their triplets.
Takahashi lenses are made by canon.
A lot of the cheaper brands will use lenses from the Far East (China, Taiwan)

#8 AstroBob1951

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Posted 27 March 2020 - 07:47 AM

Thanks to everyone who responded. I was specifically asking about best lenses for my telescope. I have an Orion StarMax 90. There is no way I could or would spend $1,000's for a lens. If you could recommend lenses in the $100 range I would appreciate it.

 

Thanks,

Robert



#9 SeaBee1

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Posted 27 March 2020 - 08:16 AM

Thanks to everyone who responded. I was specifically asking about best lenses for my telescope. I have an Orion StarMax 90. There is no way I could or would spend $1,000's for a lens. If you could recommend lenses in the $100 range I would appreciate it.

 

Thanks,

Robert

 

Hi Robert and welcome to Cloudy Nights! OK, now that we know what you are really after (eyepieces, not lenses...), here ya go... at your price point, $100, I highly recommend the Paradigm line of eyepieces. They are ~$60 from our site sponsor, Astronomics, and you can get a small discount when you give them your CN username at checkout.

 

As you can see from my sig line, I use Paradigms almost exclusively. They are NOT the best eyepieces that are available, but at this price they are hard to beat.

 

CB


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#10 SeattleScott

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Posted 27 March 2020 - 09:02 AM

The Meade ultrawide series are on sale for $99 right now. Paradigms are good, as are Celestron Xcel LX, but narrower view and less consistent quality than the Meade UWA. Note that the ultrawides and Xcel can get a little heavy for a small scope, but should be fine.

If you don’t need a wide view, the Baader Classic Orthos are $79 and very sharp.

Of course the classifieds can be a way to stretch your dollar. Not much buying going on there right now so you could get a good deal.

Scott

Edited by SeattleScott, 27 March 2020 - 09:05 AM.

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#11 Dave Mitsky

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Posted 27 March 2020 - 12:32 PM

Your 90mm f/13.9 telescope has a focal length of 1250mm and comes with 25mm and 10mm 3-lens-element eyepieces, which are probably Kellners with apparent fields of view of 40 to 45 degrees.  

I recommend purchasing a 50-degree-field-of-view 32mm Plössl, which will produce 39x and a true field of view of about 1.3 degrees, to maximize your telescope's true field of view. 

 

Buying from Astronomics helps to support Cloudy Nights.

 

https://www.astronom...ine-plossl.html

 

https://www.astronom...-25-plossl.html

The Astro-Tech Paradigm Dual ED eyepieces have larger apparent fields of 60 degrees and enhanced eye relief.

https://www.astronom...iece_series=478

A 12mm (104x) or 15mm (83x) Astro-Tech Paradigm Dual ED eyepiece might be worthwhile having.

https://www.astronom...gm-dual-ed.html

https://www.astronom...gm-dual-ed.html

 

An 8mm Astro-Tech Paradigm Dual ED eyepiece will produce 156x but the views, with the exception of bright objects like the Moon, will be pretty dim at an exit pupil of about 0.6mm (8/13.9).

Eyepiece terms are explained at https://starizona.co...ding-eyepieces/



#12 Dave Mitsky

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Posted 27 March 2020 - 12:39 PM

If you decide to take advantage of the sale on the Meade Series 5000 UWA line, the 14mm Meade (89x) will probably be the most useful.

https://www.astronom...waterproof.html



#13 AstroBob1951

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Posted 27 March 2020 - 12:40 PM

Thanks for everyone who responded and advised. It is appreciated

 

Robert



#14 The Ardent

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Posted 27 March 2020 - 01:01 PM

I suggest these as a priority buy before anything else. 

 

http://www.backyardastronomy.com/

 

http://www.philharrington.net/sw2.htm

 

 

Thanks for everyone who responded and advised. It is appreciated

 

Robert



#15 Starman1

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Posted 27 March 2020 - 01:33 PM

Dave's eyepiece recommendations are good ones.

To Ray's list of needed books, I'd add: Nightwatch:

https://www.amazon.c...85333872&sr=8-1

You will learn a lot between The Backyard Astronomer's Guide and Nightwatch, most of what you need to know to start out well in personal astronomy.


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#16 sg6

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Posted 27 March 2020 - 01:45 PM

An Orion StarMax 90 sounds like a Mak likely around 1250mm focal length.

You want what are effectively long and wide eyepieces.

 

Maybe least cost are Vixen NPL plossls 20mm and 30mm, or the AT Paradigms, 25mm and 18mm or 15mm.

 

Don't get tempted by ideas of large magnifications, on a Mak it is not a great idea.

 

Would help if you called them eyepieces rather then lens. Lens has too many alternative meanings and primarily the big one at the front of a refractor, not often the small assembly at the rear. Just the way things are.

 

Like one other I would have said a LZOS lens was the best, but that is the wrong end.



#17 Tony Flanders

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Posted 29 March 2020 - 05:38 AM

Your 90mm f/13.9 telescope has a focal length of 1250mm and comes with 25mm and 10mm 3-lens-element eyepieces, which are probably Kellners with apparent fields of view of 40 to 45 degrees.  

I recommend purchasing a 50-degree-field-of-view 32mm Plössl, which will produce 39x and a true field of view of about 1.3 degrees, to maximize your telescope's true field of view.


For what it's worth, most of the 3-element eyepieces that are packaged with scopes from reputable vendors these days have apparent fields of view of 50 degrees, and almost all are at least 45 degrees. Moreover, at f/13.9, they work just as well as Plossls.

Having said that, a 32-mm Plossl would still be very useful for maximizing the telescope's field of view. That's particularly valuable on this particular scope, which really struggles to achieve low power and widefield views.




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