WO2 Britse Bino prism No 3 MK4 verrekijker RAF Spotter binoculars - origineel
Article number: 5067860. F4Dit is een originele Wo2 Britse Bino prism No 3 MK 4 verrekijker in een gebruikte staat.
Hij is in Britse legergroen overgeschilderd, maar de oorspronkelijke laag zit er nog onder. Dat werd na de oorlog gedaan. Ook met de oorlogse verrekijkers.
Op de rechterkant staat
"GRATICULES 1/2°APART AND 1/4°1/2°AND1°HIGH"
Je ontvangt exact degene van de foto's.
The binoculars are in good working condition with correct collimation and reasonably nice images for their fixed focus design feature and age.
For further technical information, while these fixed focus spotter binoculars allow their users such as aircraft pilots to quickly find targets in different distances, their image clarity is not as high as the binoculars with fine focus adjustment. This is a design feature of those fixed focus spotters in the old days.
General wear and tear appropriate with age and services.
Manufacturer/Model: Ross BinoPrism No. 5 Mk 4 7X50
Field of View: 7.18 deg = 126 m/1,000 m; APFOV 50 deg
Weight: 1,082 gr
Exit Pupil: 7.14 mm
Serial #/Year of Manufacture: 50719
Notes: The Bino.Prism No. 5 7X50 made by Ross was adopted by the British Army in 1935.
The BinoPrism No. 5 was made in five Marks: Mk I (1935); Mk II (1938), same as the Mk I but with a graticule; Mk III (1941), has an improved objective assembly; Mk IV (1941) same as Mk III but with a modified prism mount to simplify manufacture; Mk V (1943) has improved sealing with gaps filled by molten metal, and it has ports for dry air purging. The various Marks may also have minor variations in IPD plate and front hinge cap design. In 1942 the vulcanized rubber covering was replaced with a painted crackle finish. Although most if not all BinopPrism No. 5's were made between 1935-1945, they remained in service until at least the 1980's undergoing numerous servicings and modifications. Some significant modifications were: in 1947 it was specified they be painted olive drab color; although none were originally made with anti-reflective coated optics, many post-war ones were retrofitted with coated optics; many were fitted with ports like the red screws on this example for dry air (not nitrogen) purging.
It has a graticule in the right eyepiece and the marking "GRATICULES 1/2°APART AND 1/4°1/2°AND1°HIGH" on the right prism plate references the graduations on the graticule. The marking “OS735GA” on the right prism plate references General Arrangement drawing 735 on the Optical Stores list showing a modification of an earlier model. Usually only optical instruments made for the Army showed OS numbers followed by an MA or GA suffix.
