Nikon 6D: Autocollimator for measurement of very small angular errors
Telescope's magnification: 38x
Objective f=700mm; effective aperture: 70mm
Measuring range: 30 arcmin
Measuring unvertainty: 0.5" arcsec within an area of 5 arcmin
1 arcsec within an area of 30 arcmin
Light source: LED