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C47280 Alignment Telescope
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Special barrel length telescope |
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The C47280 is similar to the 2062, and is excellent for
establishing and/or holding optical reference lines. The barrel
length, magnification, and field of view of this instrument are
different than other instruments in our family of alignment
telescopes. The barrel length of the C47280 is
specifically designed as 10" long. The instrument
has no built-in micrometers. It does have a built-in autoreflection
target and comes with an autocollimation illumination unit (our
508, operating at 110-220VAC).
The C47280 may be purchased without the autoreflection target
by specifying item number C47280-NAR. The C47280 is classified as National Stock Number NSN
6650-00-424-7237.
Additional general information about
our alignment telescopes is available on this website.
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Magnification:
30x at infinity, ±10%.
Focusing range:
Zero to infinity.
Resolving power: 3.4 c/mm (according to NIST
test procedure).
Straightness of line of sight: ±0.002" (0 to 50 ft.);
±0.004" (50 to 100 ft.); 0.5 arcseconds beyond 100 ft.
Field of view:
41 minutes, ±10% |
Effective aperture: 42 mm.
Optics: Fully coated optics used throughout.
Reticle: All-purpose, double glass, dustproof;
cross-pattern with single lines top and right, paired lines bottom and left.
Eyepiece: Fully erect image; diopter scale. Right-angle
eyepiece and complete projection accessories available.
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Focusing knob: Drum graduated to show focusing distance in feet.
Telescope barrel: Through-hardened stabilized stainless steel.
Barrel diameter:
2.2498" (+0" −0.0003")
Meets A.I.A. specifications.
Barrel length: 10"
Overall length: 19"
Weight: 11 lbs. |
- 187-S Coincidence Striding
Level
- 2230 Right Angle Eyepiece (discontinued)
- 2240 Combination Auto-Collimation,
Projection, Right Angle eyepiece
- 2302 Angle reading
attachment
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- 2410 Optical Square (discontinued)
- 2412 Double Optical Square (discontinued)
- 3205 Cross Level
- 3220 Coincidence Striding Level (discontinued)
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