Jump to content

  •  

CNers have asked about a donation box for Cloudy Nights over the years, so here you go. Donation is not required by any means, so please enjoy your stay.

Photo

Need some info: Edmund 32mm Erfle

  • Please log in to reply
9 replies to this topic

#1 KidOrion

KidOrion

    Surveyor 1

  • *****
  • topic starter
  • Posts: 1,962
  • Joined: 07 Jul 2007
  • Loc: Eugene, OR

Posted 12 September 2019 - 12:15 AM

As part of a large consignment of telescope gear that was recently donated to EAS, there was a very small set of eyepieces--most of them less-usual types. Among them were a (suspected) Paul Rini 15mm, a 30mm 80-degree AFOV eyepiece that looks suspiciously like an old University Optics eyepiece, and the following Edmund 32mm Erfle. 

 

I'm curious about this one; it's got an unpainted barrel that has been pretty tarnished, and the only one I've seen (online) that was similar had a black barrel. Is this one of the military Erfles?  Does anyone have any idea of its vintage and/or value?  Although the barrel is nicked and tarnished, the glass looks pretty darn good given that it was stored in an attic uncovered for quite some time.

 

 

Attached Thumbnails

  • IMG_3827small.jpg

  • Terra Nova likes this

#2 KidOrion

KidOrion

    Surveyor 1

  • *****
  • topic starter
  • Posts: 1,962
  • Joined: 07 Jul 2007
  • Loc: Eugene, OR

Posted 12 September 2019 - 12:16 AM

A second view:

 

 

Attached Thumbnails

  • IMG_3830small.jpg

  • eros312 and Terra Nova like this

#3 luxo II

luxo II

    Apollo

  • -----
  • Posts: 1,489
  • Joined: 13 Jan 2017
  • Loc: Sydney, Australia

Posted 12 September 2019 - 12:40 AM

It’s not a military erfle (I had a couple long ago) - it’s simply an early Edmund one. Looks like the lenses are uncoated, and as it’s nothing special optically nor collectible, it’s value is purely sentimental.

Put it in a scope and enjoy the view.

Edited by luxo II, 12 September 2019 - 12:41 AM.

  • nicoledoula likes this

#4 KidOrion

KidOrion

    Surveyor 1

  • *****
  • topic starter
  • Posts: 1,962
  • Joined: 07 Jul 2007
  • Loc: Eugene, OR

Posted 12 September 2019 - 01:09 AM

It’s not a military erfle (I had a couple long ago) - it’s simply an early Edmund one. Looks like the lenses are uncoated, and as it’s nothing special optically nor collectible, it’s value is purely sentimental.

Put it in a scope and enjoy the view.

Good to know. I didn't expect it to be worth much, but after a daytime test in a (similarly-donated) 12" Lightbridge, it seems to be a pretty fine eyepiece.



#5 havasman

havasman

    Voyager 1

  • ****-
  • Posts: 10,311
  • Joined: 04 Aug 2013
  • Loc: Dallas, Texas

Posted 12 September 2019 - 01:34 AM

I think the zip code keeps it from being very old.


  • nicoledoula likes this

#6 MarkGregory

MarkGregory

    Viking 1

  • -----
  • Posts: 756
  • Joined: 14 Jun 2012
  • Loc: Advance, North Carolina

Posted 12 September 2019 - 03:11 AM

Pretty neat ocular regardless of its value.



#7 lylver

lylver

    Viking 1

  • *****
  • Posts: 772
  • Joined: 15 Feb 2017
  • Loc: near Grenoble

Posted 12 September 2019 - 05:10 AM

Old stuff

a review of this eyepiece


  • nicoledoula likes this

#8 John Rogers

John Rogers

    Messenger

  • *****
  • Posts: 475
  • Joined: 08 Feb 2008

Posted 16 October 2019 - 12:18 PM

Actually this eyepiece is based on the #5160 war surplus eyepiece sold by Edmund in the 50s and 60s.  Although it was called an Erfle, it is technically a Kaspereit, having a sixth element.   This is the same eyepiece used in the Edmund Satellite Telescope and their Deluxe Finder. 

 

It is unclear, but there may have been some optimizations to one or more of the elements, performed by David Rank and was branded RKE at some point.  Therefore, it is often refered to as the Edmund 32mm RKE.


  • Terra Nova likes this

#9 nicoledoula

nicoledoula

    Apollo

  • *****
  • Posts: 1,180
  • Joined: 31 Jan 2018

Posted 16 October 2019 - 03:03 PM

Post 1963 manufacture date.



#10 John Rogers

John Rogers

    Messenger

  • *****
  • Posts: 475
  • Joined: 08 Feb 2008

Posted 20 October 2019 - 12:06 PM

1989_Catalog_32mm_RKE.jpg

 

The RKEs were first introduced in early 1978.  The 32mm was added later.  Here it is listed in a 1989 catalog, that confirms the RKE designation.  Perhaps someone has an earlier catalog they could check?

 

 


  • eros312 and 25585 like this


CNers have asked about a donation box for Cloudy Nights over the years, so here you go. Donation is not required by any means, so please enjoy your stay.


Recent Topics






Cloudy Nights LLC
Cloudy Nights Sponsor: Astronomics