Alignment
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Alignment telescopes

Alignment telescope with straight viewing

Article description Ord.-No.
Alignment telescope with straight viewing FFG 300/40/14.7 231 701

In alignment telescopes with straight viewing the image will appear mirrored an upside down. The eyepiece is orientated in a line with the alignment axis. For this reason straight viewing telescopes are mainly used in applications with horizontal reference line. Please consider if a right angle view could be more useful for your set up. For example this might be the case if used on an optical table.
Eyepiece and reticle are included. Other eyepieces with focal length f=10 or f=25 are available on request. By choosing between eyepieces with different focal lengths, the magnification and the field of view can be varied according to the needs of the application.

Alignment telescope with right angle viewing

Article description Ord.-No.
Alignment telescope with right angle viewing FFR 300/40/14.7 231 702

In alignment telescopes with right angle viewing the eyepiece is orientated on 90° towards the reference axis. Beside the ergonomically advantages you will get for some applications, the image will be transformed by the internal prism to be upright and not mirrored any more. The right angle type is manly used in vertical set-ups.
Eyepiece and reticle are included. Other eyepieces with focal length f=10 or f=25 are available on request. By choosing between eyepieces with three different focal lengths, the magnification and the field of view can be varied according to the needs of the application. Please specify the orientation of reticles if they contain text elements or co-ordinates.

Alignment telescope with straight viewing and double micrometer

Article description Ord.-No.
Alignment telescope with straight viewing and double micrometer
FFG 300/40/14.7		 231 711

Alignment telescopes with straight viewing and double micrometer give the possibility to measure the lateral displacement of the target in horizontal and vertical direction in the image plane. The real displacement of the target can be calculated by multiplying with the image magnification.
Eyepiece and reticle are included. Other eyepieces with focal length f=10 or f=25 are available on request. By choosing between eyepieces with three different focal lengths, the magnification and the field of view can be varied according to the needs of the application.

Technical Data
Focusing range 0 to infinity
Accuracy of line of sight* 10 µm
Magnification of reticle image (approximate values)
at 0,5 m
at 1 m
at 5 m
at 10 m
at 20 m		 5,8x
8,2x
24x
42x
77x
Eyepiece f = 10 mm f = 14,7 mm f = 25 mm
Total magnification (approximate values)
at 0,5 m
at 1 m
at 5 m
at 10 m
at 20 m
infinity 		14,5x
16,2x
21,4x
23,6x
25,3x
28,9x		 9,9x
11,0x
14,64x
16,0x
17,2x
19,6x		 5,8x
6,4x
8,6 x
9 ,4 x
10,1x
11,5x
Field of view
at 0,5 m
at 1 m
at 5 m
at 10 m
at 20 m
infinty 		25 mm
35 mm
100 mm
180 mm
330 mm
1,4° 		60 mm
85 mm
250 mm
430 mm
800 mm
2,2° 		60 mm
85 mm
250 mm
430 mm
800 mm
2,2°
Objective
Focal length
Free diameter		 80 mm (at 0 m) to 289 mm (infinity)
26 mm
Barrel diameter 40f7
* The accuracy of the line of sight denotes the deviation to a straight line measured in the image plane