OTA · 2016–
Takahashi Mewlon-250CRS
Key specifications
| Aperture | 250 mm |
|---|---|
| Focal length | 2500 mm |
| Focal ratio | f/10 |
| Optical design | Dall-Kirkham |
About
250 mm corrected Dall-Kirkham Cassegrain, 2500 mm focal length at f/10. Adds a 3-element ED-glass sub-aperture corrector for a flat field (40 mm image circle) plus ASCOM electronic focusing and 3-fan primary cooling — a Dall-Kirkham with Ritchey-Chrétien-like corrected performance.