CCT-50 and Larger
Our typical 1.3M Classical Cassegrain has an F/3 primary mirror with an effective focal ratio between
F/8 and F/18. The 100 mm field is fully shielded and unvignetted.
Both primary and secondary mirrors have near zero expansion substrates
Back Focus is 28 cm from mounting surface
2 variable, low voltage power outlets for reticles provided on optical tube assembly
2 AC power outlets on optical tube assembly
Finderscope: 5 in. F/9 with 2 in. dia, 32 mm focal length eye piece and projection reticle
47.5 in. diameter friction drive in RA and 42 in. diameter friction drive in DEC
Open structure optical tube assembly affords better
Steel mirror cell with multiple 12-bolt patterns per KPNO standard
Tracking accuracy: +/- 0.5 arc seconds in 5 minutes and +/- 3 arc seconds in 1 hour
Variable set, guide and tracking rates: 0 to 3 deg./sec.
Epoxy paint for durable, functional appearance
Supports 200 kg instrument load with CG 36 cm behind mounting surface