No details.sounds like a tinplate type of equipment. version from 1923) he operates with the following types: Kleiner Blinkgerät. Schwarte (1920) only mentions a mitteler Blinkgerät ( medium size signal instrument ). Mr Seeger writes ( Pg 173) that the old book of Dr. No graticule, so it must be for observing, rather than aiming. The mount is a swallows tail, apparently moulded directly with the conus body of the instrument. Combined with the now missing front sight post, just behind the cylindrical objective housing, it serves as a sight. At the edge of the prism house cover a notch has been made. Zink is dominant, but the small parts are still made of brass.
E LEITZ WETZLAR BINOCULARS 15X60 SERIAL NUMBER
The serial number is 641657 which should make it a late 1916 production item. Note how the top disc of the prism house is extending a bit, just like on the one I have found. In Seegers 2nd edition of the grey book he shows a binocular of the same type on page 177, Abb. 15圆0 It is a 15X magnification and meant for a german WW1 Blinkgerät. Thanks for drawing it to my attention!īest wishes, Fred = Subject: 15圆0 monocular From: mikedenmark******tele.dk Been a bit silent here for some time, but today I got this monocular. The example I have lacks the vertical sighting vane in the photo, but the paint wear around the objective cells is identical to the glass shown. It was a 4x24 Ross design, introduced in 1936 for exactly the purpose depicted, but not made in great numbers. I think this is a British Army Binocular, Prismatic, No.6 Mk.1. > (A miniature Porro II.very unusual) It is indeed a rarity. > World War II Soldier laying back in chair looking up at sky with binoculars. Finding perfection (It would be interesting if someone could explain on the list by what techniques these reticules were made> With the men of the searchlights : the "spotter." a nerve-racking job. = Subject: Collimation From: "William Cook" Steve Wrote: >When I did find collimation errors, I would pull the hinge, and replace one side with another until the error was down to a degree (or two). The exact reasons for this rejection are buried in British archives, but would be quite interesting to learn. Among other details, there are more hints on the rejection by the British of 6 x 30's by B & L and Crown, about 80 years ago. Bulletin of the Scientific Instrument Society #70 (2001) 19-27. (the inlet into the prism housing is for use with a dessicator, not for nitrogen purging) A letter on pp18-19 expands briefly on his: Binoculars in the Air. Bulletin of the Scientific Instrument Society No. Barr & Stroud 'Nitrogen-filled Binoculars': the facts. home page: 301-350 Binocular List #301: 23 June 2004 = Subject: New papers From: Peter Abrahams Bill Reid has a new paper on Barr & Stroud, and a letter expanding on an earlier article, in the new Bulletin of the Scientific Instrument Society: Reid, William. Why makers such as these couldn't produce a simple thing like a durable leatherette covering is a mystery although Leitz finally did so with the introduction of the Trinovids in 1963.Įdited by FrankL, 03 February 2018 - 11:13 PM.Archives of an email list on the history of binoculars. The Hensoldt coverings appear to be of the same material Leitz used cracking and breaking off the same way while the Huet coverings (possibly only on their civilian model binoculars) have a tendency to peel and of all things shrink over time. To digress a little two other manufacturers of high quality binoculars also had problems with their leatherette coverings - Hensoldt and Huet. There was also a 15圆0 Campofortit (in addition to individual focus versions of all configurations) which I don't have yet but which I imagine is likewise optically superb. Other than not having wide-angle fields of view the only other two criticisms I can find with them are: 1) having 60 mm objectives and being of a Porro I build they are large and fairly heavy and 2) their leatherette coverings do not stand the test of time well and examples are usually found with these coverings cracking and breaking off in large pieces (which is a boon for collectors like me because this can depress auction or asking prices even though the repair isn't that costly or difficult). I've the 8圆0 Maroctit, 10圆0 Decimarit and 12圆0 Mardocit, all made during the 1950's and single layer anti-reflective coated, and as long as wideness of field of view is not a consideration because none can be considered wide-angle in my experience they are optically the best binoculars in their powers made during the post-war period until the introduction of multi-layer coatings.
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