Britsh Optics.

[behblc]

Not sure if this is the right section to put these in but here goes.
Two gunnery optics by Ross.
The smaller of the two, a 3.5 x 24 binocular gunsight (naval) , optics are uncoated , with a wide field of view.
Adjustment for eye width is by means of the handwheel on the top of the binocular, each ocular is adjusted individually.
A graticule / cross hair within a circle is set in the right side ocular , this can be illuminated and comes up as " white on a black background.
Clear optics Porro II ssytem and pleasing to use.
The circular filter housing contains yellow and grey filters which can be rotated into place via the brass slides / knobs .
Finished in green crinkle finished paint, comes in a wooden transit case.

Larger one is a 7x50 Gunnery directory sight (naval) for use in a directory control tower .
Eye scale and graticule ( right side) can be illuminated.
Four coloured filter system adjusted by slides , a polarising filter can be engaged via the knob on the top of th optic.
Optics are coated.
Several different models exist, this one haas been adapted for mounting on a tripod.

[Adrian Stevenson]

Hi there, what do you need to know about them? (not that I know anything about them )

Cheers, Ade.

[behblc]

AA Optic.

Ade,
I am most interetsed in the 3.5 x 24 sight , what gunnery system was this part of or linked to ?
Also would anyone have any ideas on this small optic by Ross brillant clear wee thing with a cross hair .
Possibly a quick sight for something but what ?

Britsih optics are not always flavour of the month in military collecting circles , not being considered as refined as Germany or American gear.
Having said that good sets of Ross and Barr and Stroud can be had for very reasonable money.

[behblc]

Another view

Two more views of the Ross 3.5 x 24 AA and the 7 x 50 Gunnery directory sights.
Any info on them , the AA sight in particular would be welcomed.

My thanks to Ade for reducing the "KB" value of the jpegs.

[behblc]

Barr and Stroud GK7 .

A Barr and Stroud GK7 a director telescope ( double) , 6x42 with coated optics.
As with all Barr and Stroud WW2 navay gear three colour filter sytem is present.
Graticules in right side ocular can be rotated against each other , I am told this allows bearing to be taken on targets being tracked relative to the positiopn of the director.
Inter pupilary distance is adjusted by way of a worm drive , about 750 sets made each set is numbered amtached to a transit case.
Dr. Hans Seeger rates optical preformance as being "good".
A heavy weight , base and objective constructions are of brass , tubes are alluminium.

[behblc]

GK7 barr and Stroud.

Another view of the GK7.

[behblc]

Gk7.

Top view of GK7 , also in the photograph American Sard Mk 21 7x50 ,
Japanese Navy 7x50 ( Powder Blue eye cups) and a Kriegsmarine Zeiss ( blc) 7 x 50 with bakalite rainguard.

[behblc]

Some time since this thread but a good deal of progress.
The 7x50 model, a variation on ot for control of searchlights on cruisers and King George V Class battlewagons.

[behblc]

Ross 7x50 and barr and Stroud GK7

I found this photo of a Ross 7x50 and a GK7 being used in radar direction for AA guns.
Copyright owned by IWM.

[behblc]

3.5 Wide angle AA layers sight.

Used in radar laying.
Attached directors are onboard Prince of Wales.