The results are simply amazing: a telescope that offers a wide, flat focal plane (80 mm in diameter, with 198.5mm backfocus extraction after ESATTO 4" focuser). A wide focal plane that is diffraction limited over a wide spectral range. The corrector group is very close to the focal plane, so chromatic aberration is undetectable.
OfficinaStellare RiDK500 telescope has 294mm backfocus from the M120x1 female thread that is present in the rear cell. Since thickness of ESATTO 4” plus the adapter is 95.5mm, you still have 198.5mm of backfocus after the ESATTO 4". This allows you to add also the ARCO 3" camera rotator and field de-rotator and to add complex imaging trains composed by large format cameras and different accessories.
Officina Stellare RiDK 500 f7 with ESATTO 4" - scope of delivery:
- Officina Stellare RiDK 500 f7
- ESATTO 4" robotic focuser
- Adapter ESATTO 4" for Officina Stellare ProRC, RiDK, RiFAst
- TC-01 electronic
- 2 Losmandy bars (one bottom and one top)