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JIMZ7
Pooh-Bah


Reged: 10/22/05
Posts: 1368
Loc: near DTW Metro Airport
Celestron 30mm Plossl
      #1402864 - 02/04/07 10:25 AM

I just purchased a 30mm Plossl with white lettering made in Japan for Celestron. I was told it is exactly the same eyepiece as the Ultima 30mm. It is excellent on my Meade 826C 8" f/6 reflector thus becoming my favorite. It barlows well at 2.5x. Does anyone else have this eyepiece.

--------------------
Discovery 10" f/5.6 DHQ
Televue 10.5mm Plossl "smoothie"(R)
Celestron 26mm Plossl "silvertop"(V)
Celestron 30mm Plossl "pre-Ultima"
Minolta 10x50mm Standard EWA

**************************************************
"He stretcheth out the heavens as a curtain,and spreadeth them out as a tent to dwell in." Isaiah 40:22
"Therefore rejoice,ye heavens,and ye that dwell in them" Revelation 12:12


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Lawrence Sayre
Abbe Normal


Reged: 10/16/04
Posts: 5128
Loc: N.E. Ohio
Re: Celestron 30mm Plossl new [Re: JIMZ7]
      #1402912 - 02/04/07 10:45 AM

The Plossl is a 4 element design, and the Ultima is a 5 element design, so if it is a Plossl, then they can not be identical.

--------------------
My philosophy, in essence, is the concept of man as a moral being, with his own happiness as the moral purpose of his life, with productive achievement as his noblest activity, and reason as his only absolute.

Ayn Rand (in the appendix to 'Atlas Shrugged')



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JIMZ7
Pooh-Bah


Reged: 10/22/05
Posts: 1368
Loc: near DTW Metro Airport
Re: Celestron 30mm Plossl new [Re: Lawrence Sayre]
      #1402955 - 02/04/07 11:12 AM

I don't know if it has 4 or 5 elements,all I know and I should have said it earlier,that it was used in a binocular viewer and it performed exactly the same as the other eyepiece which was a Ultima 30mm. It was also mentioned it had the same fieldstop. It looks like the Ultima before it was called the Celestron Ultima. I believe their are 5 element eyepieces that are called plossls even though you and I know plossls have 4.

--------------------
Discovery 10" f/5.6 DHQ
Televue 10.5mm Plossl "smoothie"(R)
Celestron 26mm Plossl "silvertop"(V)
Celestron 30mm Plossl "pre-Ultima"
Minolta 10x50mm Standard EWA

**************************************************
"He stretcheth out the heavens as a curtain,and spreadeth them out as a tent to dwell in." Isaiah 40:22
"Therefore rejoice,ye heavens,and ye that dwell in them" Revelation 12:12


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JIMZ7
Pooh-Bah


Reged: 10/22/05
Posts: 1368
Loc: near DTW Metro Airport
Re: Celestron 30mm Plossl new [Re: JIMZ7]
      #1402960 - 02/04/07 11:16 AM

In the excelsis eyepiece review it also says the 5 element 30mm Ultima eyepiece is a plossl.

--------------------
Discovery 10" f/5.6 DHQ
Televue 10.5mm Plossl "smoothie"(R)
Celestron 26mm Plossl "silvertop"(V)
Celestron 30mm Plossl "pre-Ultima"
Minolta 10x50mm Standard EWA

**************************************************
"He stretcheth out the heavens as a curtain,and spreadeth them out as a tent to dwell in." Isaiah 40:22
"Therefore rejoice,ye heavens,and ye that dwell in them" Revelation 12:12


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Lawrence Sayre
Abbe Normal


Reged: 10/16/04
Posts: 5128
Loc: N.E. Ohio
Re: Celestron 30mm Plossl new [Re: JIMZ7]
      #1402991 - 02/04/07 11:29 AM

There may very well have been 5 element Celestron Ultima's which (very early on to be sure, likely going back to about 1980, give or take...) were badged as Plossl's, but this does not by any means make them honestly so (by design). The same error is repeated to this very day by the Antares Elites, which also for some unknown reason are incorrectly stamped "Plossl". Ditto the original Series 4000 Meade Super-Plossl's, which were 5 element designs that were by no means Plossl's.

--------------------
My philosophy, in essence, is the concept of man as a moral being, with his own happiness as the moral purpose of his life, with productive achievement as his noblest activity, and reason as his only absolute.

Ayn Rand (in the appendix to 'Atlas Shrugged')



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neoweb
Pooh-Bah


Reged: 12/10/06
Posts: 1482
Loc: UK
Re: Celestron 30mm Plossl new [Re: Lawrence Sayre]
      #1403226 - 02/04/07 01:38 PM

I also have a 30mm Celestron Ultima (orange lettering) purchased just a few days ago. On web sites it is described as a "5-element Super Plossl". And I too use it in an 8" f/6 scope (Celestron Dobsonian). Maybe it is just me but i find i get blackouts with it from time to time and have to keep the eye well back from the lense. It does perform quite well though.

--------------------
Celestron StarHopper 8" f/6 Dob
38mm Burgess 2" SWA | 30mm Ultima | 20mm Omni
17mm Hyperion | 12.5mm Baader Ortho
8mm TV Plossl | 6mm TMB/BO Planetary
Orion Shorty Plus barlow
15 X 70mm Skymasters

Saturn-like: desktop image


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Lawrence Sayre
Abbe Normal


Reged: 10/16/04
Posts: 5128
Loc: N.E. Ohio
Re: Celestron 30mm Plossl new [Re: neoweb]
      #1403247 - 02/04/07 01:50 PM

Adding the word Plossl to an eyepiece which has more in common with the Erfle than it does with the Plossl is only a marketing ploy. Erfle's got a totally bad rap, so rather than call them Erfle's, they decided to call them by a well recognized name that sells. Dr. Masuyama did some wonderful things with the 5 element Erfle design which made it come right, and I wish he would get some credit for his effort, but sadly he is totally ignored, and Super-Plossl is what they are called. Super-Erfle would have been far more correct though.

--------------------
My philosophy, in essence, is the concept of man as a moral being, with his own happiness as the moral purpose of his life, with productive achievement as his noblest activity, and reason as his only absolute.

Ayn Rand (in the appendix to 'Atlas Shrugged')



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neoweb
Pooh-Bah


Reged: 12/10/06
Posts: 1482
Loc: UK
Re: Celestron 30mm Plossl new [Re: Lawrence Sayre]
      #1403384 - 02/04/07 03:02 PM

^ Why did they get such a bad rap? Having not heard of Erfle eyepieces i Googled the name and came across this Guide to Eyepieces which says:

"What the Erfle design gives up is some sharpness of the image at the edge of the field of view. Also, if there is a very bright star nearby where you are observing, some ghost images can appear within that wide field. Inside the Erfle is a combination of three doublet lenses."

Is this why? I notice some of that in my 30mm Ultima.

--------------------
Celestron StarHopper 8" f/6 Dob
38mm Burgess 2" SWA | 30mm Ultima | 20mm Omni
17mm Hyperion | 12.5mm Baader Ortho
8mm TV Plossl | 6mm TMB/BO Planetary
Orion Shorty Plus barlow
15 X 70mm Skymasters

Saturn-like: desktop image


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SpongeBob
professor emeritus


Reged: 04/15/04
Posts: 615
Loc: Dearborn, Michigan
Re: Celestron 30mm Plossl new [Re: neoweb]
      #1403445 - 02/04/07 03:34 PM

Perhaps it is because UO already used the term Super Erfle? But most likely it is due to the FOV being similar to the plossl.
Jason

--------------------
Night Hawk Next Generation
M4 eq mount


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JIMZ7
Pooh-Bah


Reged: 10/22/05
Posts: 1368
Loc: near DTW Metro Airport
Re: Celestron 30mm Plossl new [Re: SpongeBob]
      #1403462 - 02/04/07 03:42 PM

SpongeBob you must live really close to me!

--------------------
Discovery 10" f/5.6 DHQ
Televue 10.5mm Plossl "smoothie"(R)
Celestron 26mm Plossl "silvertop"(V)
Celestron 30mm Plossl "pre-Ultima"
Minolta 10x50mm Standard EWA

**************************************************
"He stretcheth out the heavens as a curtain,and spreadeth them out as a tent to dwell in." Isaiah 40:22
"Therefore rejoice,ye heavens,and ye that dwell in them" Revelation 12:12


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Lawrence Sayre
Abbe Normal


Reged: 10/16/04
Posts: 5128
Loc: N.E. Ohio
Re: Celestron 30mm Plossl new [Re: neoweb]
      #1403534 - 02/04/07 04:17 PM

The common misconception that the Erfle has 6 elements is due to a later design derivation (in 1923 I believe) by a guy named Kaspereit, who was an associate of Heinrich Erfle. The original 1917 Erfle (US Patent #1478704, filed 1921) had 5 elements as seen in this configuration: Original Erfle

The bad rap came from its nasty edge of field astigmatism. A defect which was to a fairly high degree corrected by Dr. Masuyama's derivation. The bad ghosting rap it got early on was likely due to uncoated lenses, combined with the way light reflects through the design itself. I believe Zeiss invented single layer lens coating in about 1927, but its widespread use came later. By the early 30's, Zeiss was experimenting with multi layer coating.

--------------------
My philosophy, in essence, is the concept of man as a moral being, with his own happiness as the moral purpose of his life, with productive achievement as his noblest activity, and reason as his only absolute.

Ayn Rand (in the appendix to 'Atlas Shrugged')



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khoferer
super member


Reged: 11/03/04
Posts: 106
Loc: Mansfield, PA
Re: Celestron 30mm Plossl new [Re: JIMZ7]
      #1403618 - 02/04/07 04:58 PM

Quote:

I just purchased a 30mm Plossl with white lettering made in Japan for Celestron. I was told it is exactly the same eyepiece as the Ultima 30mm. It is excellent on my Meade 826C 8" f/6 reflector thus becoming my favorite. It barlows well at 2.5x. Does anyone else have this eyepiece.





Hi,

I know the one you mean. I owned one for a while and ended up selling it - something I still regret. Whatever its design actually is, it is a very fine eyepiece and I'm sure you'll enjoy using it.

Clear skies,
Kevin

--------------------
Celestar Deluxe
6" f/8 homebuilt dob
Celestron 10x50


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Chuck Hovatter
sage


Reged: 08/11/04
Posts: 463
Re: Celestron 30mm Plossl new [Re: khoferer]
      #1403645 - 02/04/07 05:12 PM Attachment (33 downloads)

Hi all,

I am the culprit in question who sold this EP to Jim.

Trust me guys - "This is a Celestron Ultima", made back before they coined the name "Ultima", and is quite rare as far as I can tell by the number seen offered for sale.

Jim - Nice EP, huh? . . I knew that you would like it:-)

Thank you,
-Chuck

Attachment


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Chuck Hovatter
sage


Reged: 08/11/04
Posts: 463
Re: Celestron 30mm Plossl new [Re: Chuck Hovatter]
      #1403650 - 02/04/07 05:13 PM Attachment (36 downloads)

Another Pic...

Attachment


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Chuck Hovatter
sage


Reged: 08/11/04
Posts: 463
Re: Celestron 30mm Plossl new [Re: Chuck Hovatter]
      #1403660 - 02/04/07 05:14 PM

Oh! - And yes, it is "Fully Multi Coated", and not just Multi Coated as the labeling shows.

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Lawrence Sayre
Abbe Normal


Reged: 10/16/04
Posts: 5128
Loc: N.E. Ohio
Re: Celestron 30mm Plossl new [Re: Chuck Hovatter]
      #1403679 - 02/04/07 05:21 PM

It certainly does have the profile of my 30 mm Ultima. Perhaps there is value in its rarity and uniqueness alone?

--------------------
My philosophy, in essence, is the concept of man as a moral being, with his own happiness as the moral purpose of his life, with productive achievement as his noblest activity, and reason as his only absolute.

Ayn Rand (in the appendix to 'Atlas Shrugged')



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Chuck Hovatter
sage


Reged: 08/11/04
Posts: 463
Re: Celestron 30mm Plossl new [Re: Lawrence Sayre]
      #1403705 - 02/04/07 05:35 PM

I just needed the money:-(

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astrodon
Carpal Tunnel


Reged: 04/07/05
Posts: 2552
Loc: Portland, OR, USA
Re: Celestron 30mm Plossl new [Re: Lawrence Sayre]
      #1403711 - 02/04/07 05:37 PM

Wow that looks cool! A vintage Ultima!

--------------------
Eager to get the Cave 6" f/4 out with some 'high' (medium in this scope) power eyepieces!


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SpongeBob
professor emeritus


Reged: 04/15/04
Posts: 615
Loc: Dearborn, Michigan
Re: Celestron 30mm Plossl new [Re: JIMZ7]
      #1403731 - 02/04/07 05:48 PM

Quote:

SpongeBob you must live really close to me!




I PM'd you.
Jason

--------------------
Night Hawk Next Generation
M4 eq mount


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JIMZ7
Pooh-Bah


Reged: 10/22/05
Posts: 1368
Loc: near DTW Metro Airport
Re: Celestron 30mm Plossl new [Re: astrodon]
      #1403735 - 02/04/07 05:50 PM

Chuck I kinda knew you might show up! Yes it's a great eyepiece. I just wanted to see if anybody out there was using this eyepiece. Now look what I started!

--------------------
Discovery 10" f/5.6 DHQ
Televue 10.5mm Plossl "smoothie"(R)
Celestron 26mm Plossl "silvertop"(V)
Celestron 30mm Plossl "pre-Ultima"
Minolta 10x50mm Standard EWA

**************************************************
"He stretcheth out the heavens as a curtain,and spreadeth them out as a tent to dwell in." Isaiah 40:22
"Therefore rejoice,ye heavens,and ye that dwell in them" Revelation 12:12


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