Holger Merlitz
Well-known member
This is an amazing piece of optics - thanks so much for presenting all these details about that Turret!
Cheers,
Holger
Cheers,
Holger
D) Large x50/ In-line objectives/ Abbe-Koenig prisms
Superficially these appear similar to many other large military style binoculars using Porro Type II prisms, which have so-called ‘tuna can’ shaped prism housings
However, due to significantly greater length of the A-K prisms, the prism housings are also significantly longer
A set of images of the 7x50 can be found at: http://www.historicacollectibles.co...s-7x-mod-noctar-kaiserliche-marine-circa-1915, see 2 from the series
More images and detail can be found on Johann Leichtfried’s site Fernglas Museum at: http://www.fernglasmuseum.at/museum/zeiss_df_7mal_abbe_koenig/zeiss_df_7mal_abbe_koenig.html
Images and detail about the 12x50 are also to be found on Johann’s site at: http://www.fernglasmuseum.at/museum/zeiss_df_12mal_abbe_koenig/zeiss_df_12mal_abbe_koenig.html, see an image
And Frank Weissörtel has images and information about the 10x50 model, starting at: https://www.flickr.com/photos/franksbinoculars/38014480714, again see an image
As can be seen, all 3 have:
- a similar external construction, and
- a slight degree of offset of the objective and eyepiece axes, which is minimised by using an objective above eyepiece orientation
John
………...D) Dual Magnification - Turret Model
Prior to WWI, Zeiss also introduced a dual magnification 5x and 10x model with a 25mm objective
.........….John
After this wonderful excursion into history, I am now returning to a modern time binocular, a Leica Noctivid (though I don't know whether 8x42 or 10x42).
Cheers,
Holger
When you enlarge the pic you'll see it's a 10 times.
Jan
Sharp eyes, Jan, now I found it, too!
Thanks,
Holger
Attached is a view of the Leitz Amplivid 6 x 24 taken from Fan Tao's 2004 Wide Angle presentation (page 8): https://web.archive.org/web/20090424202300/http://home.att.net/~binofan/WABino.pdf