Barr & Stroud Binoculars. Historical interest

Barr & Stroud Binoculars

hewlett.packard@bigpond.com.au

Barr & Stroud Binoculars. Historical interest Barr and Stroud CF25 (7 x 42). This unit has been refurbished internally, stripped and cleaned, particularly to clean the fungus off the Prisms and Lenses, it is now in full working order. The low light performance of these Porro II H prisim type binoculars is excellent. Serial no 40583M.

Barr and Stroud CF25 filter wheel (left) left and right wheels are symetrical, not identical.

Barr and Stroud CF25 Porro II H prism, the ocular field lens can clearly be seen glued to the prism block.

Barr & Stroud CF41 (7 x 50) serial 53061. So many of these B&S binoculars are "bitsers" bits of this one and bits of that one, that the serial number can almost be meaningless.

A bit here about how to rebuild a pair of CF41 binoculars.

To remove the Barr and Stroud CF41 prism boxes. Remove the small locking screws, bind the bakellite with several layers of heavy duty tape, put a hose clamp around it and do it up as tight as you can. Put the pipe grips on it and heave-ho, these can be really tight.

How to unscrew the Bakelite end caps.

Prism box stripped down.

The rotary filters.

How to unscrew the rotary filters.

Beaut Aussie made special tool for unscrewing the rings .

Back off the collimation screws before trying to get the lenses out.

Beaut Aussie made binocular laser collimator .

Made in occupied Japan Binoculars.

"no name brand" binoculars made after the cessation of hostilities out of left over military components. Very good optics.

These are Fuji Optical Company, FOC. The quality of these is well above average, note the knurled alloy eyepices and machined alloy C.F. adjuster. Slightly heavier than most Japanese 7x50s.

Also the adjusting bridge between the eyepieces is thicker than normal, providing greater rigidity and more consistant left-right focus. Coating on the lenses, but not on the prisms, optics are excellent.