Central obstruction is 55%, but still smaller than similar designs, that simply can't compete under any point of view. The visual contrast is very good, thanks also to the special ultra-dark paints we use. The corrector group is very close to the focal plane, so chromatic aberration is undetectable. Fully corrected and illuminated field is 70mm and backfocus extraction is 145mm.
Officina Stellare RiFast 400 f3.8 with ESATTO 4"- scope of delivery:
- Officina Stellare RiFast 400 f3.8
- ESATTO 4" robotic microfocuser
- Adapter ESATTO 4" for Officina Stellare ProRC, RiDK, RiFAst
- TC-01 electronic
- 2 Losmandy bars (one bottom and one top)