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Origins of Ploessl Eyepiece

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#1 RogerC

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Posted 16 January 2013 - 04:05 PM

Hi, All.

In case anyone is interested, I've just published an article about the origins of the Ploessl eyepiece, and how this 20th c. invention became connected to the 19th c. Viennese optician GS Ploessl. The connection has been rather shrouded in mystery in the past.

The article is available in the Journal of the Antique Telescope Society. http://webari.com/oldscope/

Cheers,
Roger Ceragioli

#2 RogerC

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Posted 16 January 2013 - 04:09 PM

I've been instructed that the correct URL is: http://oldscope.org/

Cheers,
Roger

#3 Mark9473

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Posted 16 January 2013 - 04:11 PM

So where on that site is your article?

#4 RogerC

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Posted 16 January 2013 - 04:18 PM

Hi, Mark.

The paper isn't posted online. It is an old-fashioned research article, scholarly in content, about 25 pages. You have to contact the ATS to order a copy for a small fee. I'm not allowed to distribute it for free. It is copyrighted to the ATS.

Cheers,
Roger

#5 Mark9473

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Posted 16 January 2013 - 04:21 PM

Hahaha, well that fits that type of Society. I'll revert to Wikipedia, thanks.

#6 RogerC

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Posted 16 January 2013 - 04:39 PM

The bibliographic citation is:

Ceragioli, R., "Georg Simon Ploessl and his Namesake Eyepiece," Journal of the Antique Telescope Society, 36 (Fall, 2012), 2-24.

On the www.oldscope.org URL, click on "contact us." You can email Walt Breyer of the society, to obtain a copy, if interested.

Roger Ceragioli

#7 BillP

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Posted 16 January 2013 - 06:37 PM

Hi Roger! Thanks for the information. Have contacted them and look forward to the read.

Appreciated,
-Bill

#8 MRNUTTY

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Posted 16 January 2013 - 08:00 PM

How did it go from Ploessl to Plossl? Or did it?

#9 Jim Nelson

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Posted 16 January 2013 - 08:10 PM

"Ploessl" is an alternate way of spelling "P-l-o with an umlaut-s-s-l."

Technically there is no "Plossl" eyepiece (o without an umlaut), but since umlauts are difficult to type w/standard keyboards and fonts, "Plossl" is used casually.

See the umlaut!:

http://www.televue.c..._page.asp?id=51

#10 RogerC

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Posted 16 January 2013 - 08:15 PM

Hi, Bill.

Sure. Hope you like it.

Any idea when your book will appear? I'm looking forward to it!

Cheers,
Roger

#11 Starman1

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Posted 16 January 2013 - 08:26 PM

Roger,
This would appear to contradict many previous descriptions of the development of the "Plössl" eyepiece (there are 3 variations of it he designed himself), as in:
http://www.astrosurf...f_eyepieces.pdf
and other works.
Did you look at his original work and patents?
How does that make modern versions something other than copies of that design?

#12 BillP

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Posted 16 January 2013 - 10:03 PM

I hope early March. In review now.

#13 Jaimo!

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Posted 16 January 2013 - 11:22 PM

"Ploessl" is an alternate way of spelling "P-l-o with an umlaut-s-s-l."

Technically there is no "Plossl" eyepiece (o without an umlaut), but since umlauts are difficult to type w/standard keyboards and fonts, "Plossl" is used casually.

See the umlaut!:

http://www.televue.c..._page.asp?id=51


On a windows machine, using just about any font:

umlaut ö = alt+0246

degrees° = alt+0176

:grin:
Jaimo!

#14 Jim Curry

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Posted 17 January 2013 - 06:37 AM

great article, Roger. Thanks. (I read it in my ATS newsletter)

Jim

#15 Sarkikos

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Posted 17 January 2013 - 12:03 PM

Plössl - pronounced something like "plersl." "Nagler Plössl" would be pronounced "nehgler plersl." Or it should be.

:grin:
Mike

#16 DaveJ

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Posted 17 January 2013 - 01:54 PM

Plössl - pronounced something like "plersl." "Nagler Plössl" would be pronounced "nehgler plersl." Or it should be.


Perhaps so, but the man himself (Uncle Al) says "Naygler Plahsl" :grin:

#17 Sarkikos

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Posted 17 January 2013 - 02:04 PM

I read in one blog that himself pronounces Nagler somewhere between an "ah" as in "Bach" and an "a" as in "bat." That would be about right. But "Plahsl" is just plain wrong.

:grin:
Mike

#18 SteveTheSwede

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Posted 17 January 2013 - 02:06 PM

Plössl - pronounced something like "plersl." "Nagler Plössl" would be pronounced "nehgler plersl." Or it should be.

:grin:
Mike


Well, bit more like this:
The PL is hard and short like the "pl" in Pluto.
The Ö-sound isn't exactly a part of the English language (which is why the letter isn't used, one suspects) but the closest sounds I can think of would be the "u" in "lurk" or "i" in "dirk" ( a bit depending on accent but you get the idea).
And finally SSL like the "sl" in "slacker".

It's two syllables: plö-ssl

Steve

#19 Sarkikos

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Posted 17 January 2013 - 02:08 PM

Steve,

Yep, you've got it. :waytogo:

Mike

#20 BillP

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Posted 17 January 2013 - 02:16 PM

Plössl - pronounced something like "plersl." "Nagler Plössl" would be pronounced "nehgler plersl." Or it should be.

:grin:
Mike


I think I will continue to pronounce it the way that is least effort - plah sul

#21 csrlice12

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Posted 17 January 2013 - 02:33 PM

I don't worry about pronouncing it, I'd rather look thru it........

#22 DaveJ

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Posted 17 January 2013 - 02:51 PM

I read in one blog that himself pronounces Nagler somewhere between an "ah" as in "Bach" and an "a" as in "bat." That would be about right. But "Plahsl" is just plain wrong.:grin:


Haven't we had this argument err, discussion before on CN? I've asked Al at NEAF exactly how to pronounce his name and his response was NAY-gler. I thanked him for clearing that up for me since our astronomy club members were curious. We had one of our members who constantly pronounced it as NAG-ler which Al said is not the way his name is pronounced. It's a name and the holder of the name gets to pronounce it the way they want. Al chooses to pronounce it NAY-gler. Who are we to say he's wrong? :grin:

#23 Sarkikos

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Posted 17 January 2013 - 03:01 PM

When a foreign word is pronounced incorrectly often enough and long enough by native speakers of English, it will become a de facto English word. Is Plossl one of ours now?

:grin:
Mike

#24 Sarkikos

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Posted 17 January 2013 - 03:04 PM

Al chooses to pronounce it NAY-gler. Who are we to say he's wrong? :grin:


Ah ... speakers of German? But I won't press it.

:grin:
Mike

#25 rathbaster

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Posted 17 January 2013 - 05:01 PM

I don't worry about pronouncing it, I'd rather look thru it........


:like:






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