Tag Archive for 'telescope'

Battery Commanders Telescopes

Model 93, 8 x 6° 15′

Model 93 Battery Commanders Telescope

Model 93 Battery Commanders Telescope

This telescope is so constructed that the tubes can be used only in the vertical position. Its primary use is believed to be for observation and correction of artillery fire.

The eyepieces are of the multiple thread focusing type, and the diopter scale is graduated from +2 to -3. The reticle design consists of a vertical and horizontal mil scale graduated in increments of one mil from 0 to 30 on each side of 0. A light receptacle for artificial illumination of the reticle is provided.

The telescope is fitted with an angle of site mechanism. The hinge mechanism of the assembly consists of a simple hinge pin and a fitted yoke. The interpupillary mechanism is locked near the base and between the two tubes.

Telescope with Integral Tripod

Battery Commanders Telescope with Integral Tripod

Battery Commanders Telescope with Integral Tripod

The general purpose of this instrument is believed to be the observation and correction of fire, used with either machine guns or artillery. Unlike the instrument above, it employs a scissor movement and may, therefore, be used in either a vertical or horizontal position.

The reticle is the only angle measuring device provided. The limit for horizontal angles is 30 mils to the right and 10 mils to the left of zero. Vertical angles of plus and minus 20 mils can be measured. The 90° prisms are cemented. Minimum and maximum interpupillary distances are 60 mm and 70 mm.

The tripod is simply constructed, light in weight, and sturdy. It comprises an adapter or bracket for the telescope, a tripod head, and three tubular, fixed length legs with small metal shoes.


        Model 93       Tel. with Int. Tripod
Power8 diameters8 diameters
Field of view6° 15′
Interobjective distance3 3/4 ins. 
Interpupillary setting58 to 70 mm54 to 70 mm
Deviation of light in vertical plane10 ins.9 ins.
Diameter of Exit Pupil.2 ins..15 ins.
Overall length12 3/4 ins.12 ins.
Overall width6 1/4 ins. 
Weight6 lbs., 5 ozs.2 lbs., 2 ozs.
Length of tripod 11 13/16 ins.
Weight of tripod 11 ozs.

*The interobjective distance with the tubes horizontal, and the interpupillary scale set at 64 mm is 21 ins.; with the tubes vertical, and the interpupillary scale set at 64 mm, the interobjective distance is 5 ins.

Japanese: p. 178 (March 1, 1945)

Multiple Power Observation Telescope

Japanese Multiple Power Observation TelescopeThe Japanese multiple power observation telescope has three powers: 33X, 24X, and a third degree of magnification which has not been determined because of the absence of a third eyepiece in the instrument examined. Selection is made by rotating a dome-shaped holder in which the three eyepieces are mounted. This is somewhat similar to the turret head employed in motion picture cameras and to the selective eyepiece head of compound microscopes.

The objective is a compound lens with an air space between the crown and flint components. A modified porro prism is used for the erecting system. The reticle design used with the 24 power eyepiece is a simple cross. The 33 power eyepiece is not equipped with a reticle. No provision is made for an instrument light. An open line sight is provided for quick location of an object in the field of view.

The support which is made largely of machined brass castings has an upper and lower movement. The azimuth scale is graduated from 0 to 360 degrees in 1/2 degree steps; a vernier indicator allows readings of one minute to be made. Leveling is accomplished by adjusting the length of the tripod legs. The elevation arc is graduated in increments of 1/2 degrees to + and -30 degrees from 0. The tripod is of wood with brass fittings.


Length of telescopes         24 ins.
Weight of telescopes 12 lbs., 8 ozs.
Height of support 11 1/2 ins.
Distance between trunnions 5 1/4 ins.
Weight of support 13 lbs., 4 ozs.
Length of tripod 38 1/4 ins.
Length of tripod (legs extended) 55 1/2 ins.
Weight of telescope 8 lbs., 8 ozs.

Japanese: p. 177 (March 1, 1945)

Rundblickfernrohr 32 (Rbl. F. 32): Panoramic Telescope 32

Rundblickfernrohr 32 (Rbl. F. 32): Panoramic Telescope 32

Rundblickfernrohr 32 (Rbl. F. 32): Panoramic Telescope 32This panoramic telescope is used on all standard field equipment. It is a 4-power, fixed-focus type with a field of view of 10 degrees. The line of sight may be raised or lowered by rotation of the angle of site knob. The angle of site scale is graduated from 100 mils to 500 mils (300 mils in normal). The angle of site micrometer is graduated in mils from 0 to 100 mils. The azimuth scales on the vertical barrel of the telescope are graduated in 100-mil intervals; the upper scale, 0 to 64, is fixed in relation to the rotating head. The lower has two semi-circular scales numbered 0 to 32 and can be rotated independently of the rotating head. A knurled portion permits adjustment. The azimuth micrometer includes two scales graduated in mils from 0 to 100 mils. The outer scale can be rotated independently of the azimuth worm. Evidently the fixed azimuth scale and micrometer are used for initial laying of the piece and the second scale and micrometer are then zeroed and used to measure base deflection. A throw-out lever is provided for rapid setting in azimuth. A locking lever locks the azimuth micrometer in any setting. The reticle pattern is shown above.

The existence of Panoramic Telescopes 36 and 37 has been confirmed. They are believed to be very similar to the Rbl. F. 32.


Power           4X
Field of view 10°
Weight 5 lbs.

German: p. 183 (June 1, 1945)

Rundblickfernrohr 16 (Rbl. F. 16) and Rundblickfernrohr 16/18 (Rbl. F. 16/18): Panoramic Telescopes 16 and 16/18

Rundblickfernrohr 16 (Rbl. F. 16) and Rundblickfernrohr 16/18 (Rbl. F. 16/18): Panoramic Telescopes 16 and 16/18The Panoramic Telescope Rbl. F. 16, which has been replaced by the Rbl. F. 32 and 36, is still used on the 7.5 cm l. I. G. 18. It is a 4-power, fixed-focus type with a cross level and longitudinal level for checking the alignment when the telescope and bracket are secure to the mount. Since the levels are not readily visible in this position, a mirror is provided on the telescope. The elevation scale and micrometer of the head resembles those of the standard telescope, Rbl. F. 32. The azimuth scale is graduated in 100-mil intervals and numbered from 0 to 64. The azimuth micrometer scale is graduated in units of one mil. The throwout and locking mechanism is the same as that of the usual type of panoramic telescope.

The Model 16/18, shown herewith, is very similar to the 16.

German: p. 182 (June 1, 1945)