Arthur Seibert 'Wizard of Wetzlar' at Leitz

[Dralowid]

Do we know what optical designs Arthur Seibert worked on during his long time at Leitz? Also was he on the photographic or scientific side of the business?

I think he left in 1947 to go to Minox.

There seems to be little info about him on the net, so presumably he was subordinate to Berek or Mandler (or designing optics for microscopes etc).

 

[Sarcophilus Harrisii]

I do not know much about him. But I acquired a genuine Seibert Emoskop a while ago, and it's turned out to be one of the best tools I've ever obtained for focus calibrations. Its high magnification helps assess the sharpness of a lens image on ground glass at the film rails to a very high degree of precision. In telescope configuration its small enough, when placed behind a rangefinder eyepiece, to enlarge the patch image at least a couple of times. After a great deal of practice, I'm not bad calibrating a RF with the naked eye. But the Emoskop lets me assess the patch merge on a single tree branch a mile away with exceptional precision. I don't know what I'd do without it, now. Highly recommended for those committed to achieving a superior level of optical calibrations. And very affordable for what it is, too.

 

[Erik van Straten]

I do not know much about him. But I acquired a genuine Seibert Emoskop a while ago, and it's turned out to be one of the best tools I've ever obtained for focus calibrations. Its high magnification helps assess the sharpness of a lens image on ground glass at the film rails to a very high degree of precision. In telescope configuration its small enough, when placed behind a rangefinder eyepiece, to enlarge the patch image at least a couple of times. After a great deal of practice, I'm not bad calibrating a RF with the naked eye. But the Emoskop lets me assess the patch merge on a single tree branch a mile away with exceptional precision. I don't know what I'd do without it, now. Highly recommended for those committed to achieving a superior level of optical calibrations. And very affordable for what it is, too.

Brett, can you show us a picture of this instrument? Sounds very interesting.


Erik.

 

[Dralowid]

Herewith from teh good old BBC

http://www.bbc.co.uk/ahistoryoftheworld/objects/1GWLXtNaSlyk1pB3PbeTCA

 

[Erik van Straten]

Thank you, Michael.


Erik.

 

[Dralowid]

Siebert worked for Leitz from '20 to '47, a long time and presumably a lot of lenses.

(I fear this thread may be moved to somewhere where I will never find it again!)

 

[KoNickon]

There is something called the Jomirascope that I believe is the same thing -- perhaps not as good as the original and probably no longer made in Wetzlar. https://spyglasstelescopesite.wordpress.com/2017/03/20/jomirascope-the-best-handheld-telescope/

 

[Mr_Flibble]

(I fear this thread may be moved to somewhere where I will never find it again!)

Like the Contax I ribbons thread 😡

 

[Dralowid]

Like the Contax I ribbons thread 😡

Where is that now? Is it with my LTM refresher thread that I can't find? I know they went to a repairs section somewhere which is sort of technically correct but they are specific to a camera and...well anyway...humpf...I don't envy mods their jobs!

 

[Mr_Flibble]

Yes, it disappeared into the Repair section after some 4 years 🙁

On topic, I'm not sure, but doesn't Delaney mention Seibert as the designer of lenses and accessories in the Collector's Guide? Like Max Berek.

 

[Bill Clark]

Found this info on Mr. Seibert:

https://www.l-camera-forum.com/topic/288617-arthur-seibert-lens-designs/

 

[Dralowid]

Thanks for that, it certainly adds to the story.

 

[Rob-F]

I keep an Emoscop in the darkroom for examining details in negatives or slides when my 12 power loupe from Edmund Scientific isn't enough.