The 76D RD reducer is dedicated to Takahashi FC refractors: FC-76DC/FC-76DS, FC-100DCU/FC-100DF and FC-100DZ. It is particularly suitable for telescopes equipped with a small-format focusing system similar to that of the FS-60CB.
The mechanical output of the reducer is a M52x0.75 male thread. The mounting of a DSLR is direct, via a brand specific wide field T-ring for FS-60. The classic 56.2 mm mechanical backfocus allows alternative mounting of CMOS and CCD cameras, with or without a filter wheel.
| Characteristic | Takahashi 76D RD focal reducer |
| Item number | TKA18580 |
| Image circle diameter | 30 mm/36 mm |
| Input mechanical interface | M56x0.75 thread, female |
| Output mechanical interface | M52x0.75 thread, male |
| Metal back distance | 56.2 mm |
| Length | 48 mm |
| Weight | 190 g |
Diagram of threads and focal point position of the Takahashi 76D RD focal reducer
