DFM Engineering, Inc.
1035 Delaware Ave. Unit D
Longmont, CO 80501
Phone: 303-678-8143
Fax: 303-772-9411

CCT-20 and CCT-24


• Our typical 0.5M & 0.6M Classical Cassegrains have an F/3 primary mirror with an effective ratio between F/8 and F/18. The 125mm field is fully shielded and unvignetted.

• Back focus is 28cm 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, 32mm focal length eyepiece and projection reticle


• 30 in. diameter friction drive in RA and 28 in. diameter friction drive in DEC

• Steel mirror cell with multiple 12-bolt patterns per KPNO standard

• Tracking accuracy: +/- 0.5 arc seconds in 5 minutes, +/- 5.0 arc seconds in 1 hour

• Pointing accuracy (with refraction and alignment correction) better than 30 arc seconds RMS

• Variable set, guide and tracking rates: 0 to 4 deg./sec.

• Supports 65kg instrument load with CG 36cm behind mounting surface



Standard Classical Cassegrain

Custom Telescopes

Telescope Control Systems (TCSGalil™)

Telescope Optics

Equatorial Fork Mount

Observatory Dome and Pier