INTES-MICRO TELESCOPES

Alter MH74

Clear Aperture : 174mm Focal ratio : f4 Focal length : 712mm � 20mm Back focus : More than 60mm Photographic field of View : 3� 20� Optical quality for wave length (lambda) : 0.63 mkm (P-V) : 1/6th wave or better CKO (RMS) : 0.041 Central obstruction : 35% Focusing : adjustment of the main mirror body parts : Aluminium primary and secondary mirrors : LK7, LK5 (Pyrex) with reflective Aluminium coating and SiO2 protected Tube (length, diameter) : 700mm, 220mm Tube weight : 8kg