Hercules S8225 SCT Male Thread to M42/T2 Male Thread Adapter, and a 20 mm T-2 extension ring between the adapter and an ASI290 mono camera. Focusing as normal by loosening the knurled ring behind the objective and rotating the objective cell.
The result is a serviceable lightweight guide scope for refractors to
Looking at the image in PHD2 I wondered how it would fair the primary in my red zone area. It is mounted as finder on the C-9.25 and next to it is a piggybacked 85mm refractor all on a CEM60.
Unguided, 13 exposures at 15s stacked in SharpCap. No flats and no darks. Minimal processing in the Windows Photo
Makes one rethink small scopes or take another look at the