The TS Optics M68 1.0x flattener for Ritchey-Chretien telescopes is compatible with GSO and other RC telescopes with a focal ratio of f/8 and 2.5"+ focusers with a female M68 x 1 thread.
It offers excellent correction across full-frame and illuminates a 60mm image circle. The working distance between the flattener and the sensor is generous at 109mm, enough to fit accessories such as rotators, off-axis guiders and filter wheels. The flattener features high quality multi-coating to eliminate reflections, even around bright stars.
For simple connection to common imaging equipment, an optional M69 to M68 adapter is available here.
|Connection telescope side
|M68 x 1 male thread
|Connection camera side
|M69 x 1 female thread
|89.5 mm +/- 2mm from M69 female thread
|Multi-coating on every glass-to-air surface
|All f/8 Ritchey-Chretiens with 2.5" and larger focusers