X hits on this document

Word document

Archives of an email list on the history of binoculars. - page 25 / 150





25 / 150

and atmospheric conditions."

This site is selling a Swiss/Swedish Wild M41 WWII rangefinder (nice photo):


More pics and higher price for the Wild M41 (note 1972 placard)


A HUGE Norwegian rangefinder (search site for "rangefinder") that serviced a captured 280mm gun


Gene Lucas      (17250)



Binocular List #257: 18 May 2003.


Subject: Fungus/Inst. Repair, etc,

From: "Osborn Optical Systems" <optical_repair@___net>

  An interesting note on fungus-proofing can be found in the Army TM9-1603, dated 1951.  It states, "Because the active fungicidal element employed tends to speed up corrosive action on metallic finishes and soften optical cements, fungicidal capsuls will be used only in those instruments which are being rendered unserviceable or which experience has shown will be rendered unserviceable by fungal growth."

  Repairs. I've been out of town for the last few binolist's (restoring several WWII,  13 1/2 ft. rangefinders) so I didn't drop the Osborn Optical Systems name in the repair & service pile.  Just a reminder, we perform any type of repair or restoration, to any type of optical instrumentation.  We have about a dozen different types of collimator systems ranging from 1" up to 12" and can hold accuracies to 1/10 arc second.  Our restoration and repair work has been unmatched, period.

  A quick note about the U.S.N. 9x63, a number of these were made from parts kits in the 1970's utilizing the Mk32, 7x50 bodies.

  A word of warning.  In the last few months, we have seen a number of the Russian 15x110 military mounted binoculars.  All of them had been purchased on eBay from sellers in Russia at about half the price of "new, in the store" instruments and upon reciept by the winners, were delivered to us for "not being right".  Upon inspection, they appear to have been assembled from floor sweepings at the factory or depot.  The insides have all had considerable rust and dirt, a wide variety of incorrect screws and poor fitting parts, not to mention the lack of proper optical assembly or collimation.  Unlike the earlier units that seemed to have been made for military contract, these, must be made of left-overs or reject parts.  They can be made workable, but by the time a technician is done, they cost as much as a full price unit!


  <I asked Earl about the rangefinders.  --Peter>

  These WWII 13 1/2 ft. rangefinders are at the Fort MacArthur museum in San Pedro, CA, which is actually a part of Long Beach these days. They are in storage until I am done with them, at which point they will indeed be on display.  I am trying to have one done by the 4th of July.

Document info
Document views521
Page views521
Page last viewedWed Jan 18 02:27:47 UTC 2017