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Baader's RCC Off-Axis Guider is matched specifically for the RCC-I Coma Corrector and Digital SLR cameras. The Guider's 36.5 mm body length sets the backfocus at the 91.5 mm nominal distance required for the RCC-I.
The RCC Off-Axis Guider Assembly by Baader incorporates convenient axial and radial guidestar adjustment, without loosening the main camera connection. For axial guidestar alignment, simply turn the small knurled thumbscrew either direction to shift the guidestar along the optical axis. For radial (side to side) adjustment, loosen the bottom knurled thumbscrew and rotate the body (140° range). Simple, precise, and robust. Accepts 1.25" autoguiders or guiding eyepieces.